mcp6n11 instrumentation amplifier
TRANSCRIPT
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MCP6N11
Features
Rail-to-Rail Input and Output
Gain Set by 2 External Resistors
Minimum Gain (GMIN) Options:
1, 2, 5, 10 or 100 V/V
Common Mode Rejection Ratio (CMRR): 115 dB
(typical, GMIN = 100)
Power Supply Rejection Ratio (PSRR): 112 dB
(typical, GMIN = 100)
Bandwidth: 500 kHz (typical, Gain = GMIN)
Supply Current: 800A/channel (typical)
Single Channel
Enable/VOSCalibration pin: (EN/CAL)
Power Supply: 1.8V to 5.5V
Extended Temperature Range: -40C to +125C
Typical Applications
High Side Current Sensor
Wheatstone Bridge Sensors
Difference Amplifier with Level Shifting
Power Control Loops
Design Aids
Microchip Advanced Part Selector (MAPS)
Demonstration Board
Application Notes
Block Diagram
Description
Microchip Technology Inc. offers the single MCP6N11
instrumentation amplifier (INA) with Enable/VOSCali-
bration pin (EN/CAL) and several minimum gain
options. It is optimized for single-supply operation with
rail-to-rail input (no common mode crossover distor-
tion) and output performance.
Two external resistors set the gain, minimizing gain
error and drift-over temperature. The reference voltage
(VREF) shifts the output voltage (VOUT).
The supply voltage range (1.8V to 5.5V) is low enough
to support many portable applications. All devices arefully specified from -40C to +125C.
These parts have five minimum gain options (1, 2, 5, 10
and 100 V/V). This allows the user to optimize the input
offset voltage and input noise for different applications.
Typical Application Circuit
Package Types
RF VFG
VOUT
Low Power
VSSVDD
EN/CAL
VOUT
VOS Calibration
VREF
RM4
GM2 I2VREF
I4
GM3
I3
VTR
RG
VIP
VIM
GM1
I1VIP
VIM
POR
10VDD
IDD
VBAT+1.8V
to+5.5V
VOUT
VREF
VFG
RF
RG
200 k
10 k
U1
MCP6N11
MCP6N11
SOIC
VIP
VIM
VSS
VDD
VOUT
1
2
3
4
8
7
6
5 VREF
EN/CALVFG
MCP6N11
23 TDFN *
VIP
VIM
VSS
VDD
VOUT
1
2
3
4
8
7
6
5 VREF
EN/CALVFG
* Includes Exposed Thermal Pad (EP); see Table 3-1.
EP
9
500 kHz, 800 A Instrumentation Amplifier
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Minimum Gain Options
Table 1 shows key specifications that differentiate
between the different minimum gain (GMIN) options.
See Section 1.0 Electrical Characteristics,
Section 6.0 Packaging Information and Product
Identification Systemfor further information on GMIN.
TABLE 1: KEY DIFFERENTIATING SPECIFICATIONS
Part No.
GMIN(V/V)
Nom.
VOS(mV)
Max.
VOS/TA(V/C)
Typ.
CMRR (dB)
Min.
VDD = 5.5V
PSRR
(dB)
Min.
VDMH(V)
Max.
GBWP
(MHz)
Nom.
Eni(VP-P)
Nom.
(f = 0.1 to 10 Hz)
eni(nV/Hz)
Nom.
(f = 10 kHz)
MCP6N11-001 1 3.0 90 70 62 2.70 0.50 570 950
MCP6N11-002 2 2.0 45 78 68 1.35 1.0 285 475
MCP6N11-005 5 0.85 18 80 75 0.54 2.5 114 190
MCP6N11-010 10 0.50 9.0 81 81 0.27 5.0 57 95
MCP6N11-100 100 0.35 2.7 88 86 0.027 35 18 35
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MCP6N11
1.0 ELECTRICALCHARACTERISTICS
1.1 Absolute Maximum Ratings
VDD VSS .......................................................................6.5V
Current at Input Pins ...............................................2 mA
Analog Inputs (VIPand VIM) ..... VSS 1.0V to VDD + 1.0V
All Other Inputs and Outputs ......... VSS 0.3V to VDD + 0.3V
Difference Input Voltage....................................... |VDD VSS|
Output Short Circuit Current .............. ................ ..Continuous
Current at Output and Supply Pins ............................30 mA
Storage Temperature .............. ............... ...... -65C to +150C
Max. Junction Temperature ...................... ............... ... +150C
ESD protection on all pins (HBM, CDM, MM) . 2 kV, 1.5 kV, 300V
Notice:Stresses above those listed under Absolute
Maximum Ratings may cause permanent damage to
the device. This is a stress rating only and functional
operation of the device at those or any other
conditions above those indicated in the operational
listings of this specification is not implied. Exposure to
maximum rating conditions for extended periods may
affect device reliability. See Section 4.2.1.2 Input Voltage Limits and
Section 4.2.1.3 Input Current Limits.
1.2 Specifications
TABLE 1-1: DC ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise indicated, TA = +25C, VDD = 1.8V to 5.5V, VSS= GND, EN/CAL = VDD,
VCM = VDD/2, VDM = 0V, VREF = VDD/2, VL = VDD/2, RL = 1 0 kto VLand GDM = GMIN; see Figure 1-6and Figure 1-7.
Parameters Sym Min Typ Max Units GMIN Conditions
Input Offset
Input Offset Voltage,
Calibrated
VOS -3.0 +3.0 mV 1 (Note 2)
-2.0 +2.0 mV 2
-0.85 +0.85 mV 5
-0.50 +0.50 mV 10
-0.35 +0.35 mV 100
Input Offset Voltage
Trim Step
VOSTRM 0.36 mV 1
0.21 mV 2
0.077 mV 5
0.045 mV 10
0.014 mV 100
Input Offset Voltage
Drift
VOS/TA 90/GMIN V/C 1 to 10 TA= -40C to +125C(Note 3) 2.7 V/C 100
Power Supply
Rejection Ratio
PSRR 62 82 dB 1
68 88 dB 2
75 96 dB 5
81 102 dB 10
86 112 dB 100
Note 1: VCM= (VIP+ VIM) / 2, VDM= (VIP VIM) and GDM= 1 + RF/RG.
2: The VOSspec limits include 1/f noise effects.
3: This is the input offset drift without VOS re-calibration; toggle EN/CAL to minimize this effect.4: These specs apply to both the VIP, VIMinput pair (use VCM) and to the VREF, VFGinput pair (VREFtakes VCMs place).
5: This spec applies to the VIP, VIM, VREFand VFGpins individually.
6: Figure 2-11and Figure 2-19show the VIVRand VDMRvariation over temperature.
7: See Section 1.5 Explanation of DC Error Specs.
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Input Current and Impedance (Note 4)
Input Bias Current IB 10 pA all
Across Temperature 80 pA TA= +85C
Across Temperature 0 2 5 nA TA= +125C
Input Offset Current IOS 1 pA
Across Temperature 5 pA TA= +85C
Across Temperature -1 0.05 +1 nA TA= +125C
Common Mode Input
Impedance
ZCM 1013||6 ||pF
Differential Input
Impedance
ZDIFF 1013||3 ||pF
Input Common Mode Voltage (VCMor VREF) (Note 4)
Input Voltage Range VIVL VSS 0.2 V all (Note 5, Note 6)
VIVH VDD + 0.15 V
Common Mode
Rejection Ratio
CMRR 62 79 dB 1 VCM= VIVLto VIVH,
VDD = 1.8V69 87 dB 2
75 101 dB 5
79 107 dB 10
86 119 dB 100
70 94 dB 1 VCM= VIVLto VIVH,
VDD = 5.5V78 100 dB 2
80 108 dB 5
81 114 dB 10
88 115 dB 100
Common ModeNon-Linearity
INLCM -1000 115 +1000 ppm 1 VCM= VIVLto VIVH,VDM = 0V,
VDD = 1.8V (Note 7)-570 27 +570 ppm 2
-230 11 +230 ppm 5
-125 6 +125 ppm 10
-50 2 +50 ppm 100
-400 42 +400 ppm 1 VCM= VIVLto VIVH,
VDM = 0V,
VDD = 5.5V (Note 7)-220 10 +220 ppm 2
-100 4 +100 ppm 5
-50 2 +50 ppm 10
-30 1 +30 ppm 100
TABLE 1-1: DC ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Unless otherwise indicated, TA = +25C, VDD = 1.8V to 5.5V, VSS= GND, EN/CAL = VDD,
VCM = VDD/2, VDM = 0V, VREF = VDD/2, VL = VDD/2, RL = 1 0 kto VLand GDM = GMIN; see Figure 1-6and Figure 1-7.
Parameters Sym Min Typ Max Units GMIN Conditions
Note 1: VCM= (VIP+ VIM) / 2, VDM= (VIP VIM) and GDM= 1 + RF/RG.
2: The VOSspec limits include 1/f noise effects.3: This is the input offset drift without VOS re-calibration; toggle EN/CAL to minimize this effect.
4: These specs apply to both the VIP, VIMinput pair (use VCM) and to the VREF, VFGinput pair (VREFtakes VCMs place).
5: This spec applies to the VIP, VIM, VREFand VFGpins individually.
6: Figure 2-11and Figure 2-19show the VIVRand VDMRvariation over temperature.
7: See Section 1.5 Explanation of DC Error Specs.
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MCP6N11
Input Differential Mode Voltage (VDM) (Note 4)
Differential Input
Voltage Range
VDML -2.7/GMIN V all VREF= (VDD GDMVDM)/2
(Note 6)VDMH +2.7/GMIN V
Differential Gain Error gE -1 0.13 +1 % VDM= VDMLto VDMH,
Differential Gain Drift gE/TA 0.0006 %/C VREF= (VDD GDMVDM)/2
Differential
Non-Linearity
INLDM -500 30 +500 ppm 1 (Note 7)
-800 40 +800 ppm 2, 5
-2000 100 +2000 ppm 10, 100
DC Open-Loop Gain AOL 61 84 dB 1 VDD = 1.8V,
68 90 dB 2 VOUT = 0.2V to 1.6V
76 98 dB 5
78 104 dB 10
86 116 dB 100
70 94 dB 1 VDD = 5.5V,
77 100 dB 2 VOUT = 0.2V to 5.3V
84 108 dB 5
90 114 dB 10
97 125 dB 100
Output
Minimum Output
Voltage Swing
VOL VSS + 15 mV all VDM = -VDD/(2GDM),
VDD = 1.8V,
VREF= VDD/2 1V
VSS + 25 mV VDM = -VDD/(2GDM),
VDD = 5.5V,
VREF= VDD/2 1VMaximum Output
Voltage Swing
VOH VDD 15 mV VDM = VDD/(2GDM),VDD = 1.8V,
VREF= VDD/2 + 1V
VDD 25 mV VDM = VDD/(2GDM),VDD = 5.5V,
VREF= VDD/2 + 1V
Output Short Circuit
Current
ISC 8 mA VDD= 1.8V
30 mA VDD= 5.5V
Power Supply
Supply Voltage VDD 1.8 5.5 V all
Quiescent Current
per Amplifier
IQ 0.5 0.8 1.1 mA IO= 0
POR Trip Voltage VPRL 1.1 1.4 V
VPRH 1.4 1.7 V
TABLE 1-1: DC ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Unless otherwise indicated, TA = +25C, VDD = 1.8V to 5.5V, VSS= GND, EN/CAL = VDD,
VCM = VDD/2, VDM = 0V, VREF = VDD/2, VL = VDD/2, RL = 1 0 kto VLand GDM = GMIN; see Figure 1-6and Figure 1-7.
Parameters Sym Min Typ Max Units GMIN Conditions
Note 1: VCM= (VIP+ VIM) / 2, VDM= (VIP VIM) and GDM= 1 + RF/RG.
2: The VOSspec limits include 1/f noise effects.
3: This is the input offset drift without VOS re-calibration; toggle EN/CAL to minimize this effect.
4: These specs apply to both the VIP, VIMinput pair (use VCM) and to the VREF, VFGinput pair (VREFtakes VCMs place).
5: This spec applies to the VIP, VIM, VREFand VFGpins individually.
6: Figure 2-11and Figure 2-19show the VIVRand VDMRvariation over temperature.
7: See Section 1.5 Explanation of DC Error Specs.
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TABLE 1-2: AC ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise indicated, TA = 25C, VDD = 1.8V to 5.5V, VSS= GND,
EN/CAL = VDD, VCM = VDD/2, VDM = 0V, VREF = VDD/2, VL = VDD/2, RL = 1 0 kto VL, CL = 60 pF and GDM = GMIN;
see Figure 1-6and Figure 1-7.
Parameters Sym Min Typ Max Units GMIN Conditions
AC ResponseGain Bandwidth
Product
GBWP 0.50 GMIN MHz 1 to 10
35 MHz 100
Phase Margin PM 70 all
Open-Loop Output
Impedance
ROL 0.9 k 1 to 10
0.6 k 100
Power Supply
Rejection Ratio
PSRR 94 dB all f < 10 kHz
Common Mode
Rejection Ratio
CMRR 104 dB 1 to 10 f < 10 kHz
94 dB 100 f < 10 kHz
Step Response
Slew Rate SR 3 V/s 1 to 10 VDD = 1.8V 9 V/s VDD = 5.5V
2 V/s 100 VDD = 1.8V
6 V/s VDD = 5.5V
Overdrive Recovery,
Input Common Mode
tIRC 10 s all VCM = VSS 1V (or VDD + 1V) to VDD/2,
GDMVDM = 0.1V, 90% of VOUTchange
Overdrive Recovery,
Input Differential
Mode
tIRD 5 s VDM = VDML (0.5V)/GMIN(or VDMH + (0.5V)/GMIN) to 0V,
VREF = (VDD GDMVDM)/2,
90% of VOUTchange
Overdrive Recovery,
Output
tOR 8 s GDM = 2GMIN, GDMVDM = 0.5VDDto 0V,
VREF = 0.75VDD(or 0.25VDD),
90% of VOUT
change
Noise
Input Noise Voltage Eni 570/GMIN VP-P 1 to 10 f = 0.1 Hz to 10 Hz
18 VP-P 100
Input Noise Voltage
Density
eni 950/GMIN nV/Hz 1 to 10 f = 100 kHz
35 nV/Hz 100
Input Current Noise
Density
ini 1 fA/Hz all f = 1 kHz
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TABLE 1-3: DIGITAL ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise indicated, TA = 25C, VDD = 1.8V to 5.5V, VSS= GND, EN/CAL = VDD,
VCM= VDD/2, VDM = 0V, VREF = VDD/2, VL = VDD/2, RL = 1 0 kto VL, CL = 60 pF and GDM = GMIN;see Figure 1-6and Figure 1-7.
Parameters Sym Min Typ Max Units GMIN Conditions
EN/CAL Low SpecificationsEN/CAL Logic
Threshold, Low
VIL VSS 0.2 VDD V all
EN/CAL Input Current,
Low
IENL -0.1 nA EN/CAL = 0V
GND Current ISS -7 -2.5 A EN/CAL = 0V, VDD = 5.5V
Amplifier Output Leakage IO(LEAK) 10 nA EN/CAL = 0V
EN/CAL High Specifications
EN/CAL Logic
Threshold, High
VIH 0.8 VDD VDD V all
EN/CAL Input Current,
High
IENH -0.01 nA EN/CAL = VDD
EN/CAL Dynamic Specifications
EN/CAL Input Hysteresis VHYST 0.2 V all
EN/CAL Low to Amplifier
Output High-Z Turn-off
Time
tOFF 3 10 s EN/CAL = 0.2VDDto VOUT= 0.1(VDD/2),
VDMGDM= 1 V, VL = 0V
EN/CAL High to
Amplifier Output
On Time
tON 12 20 28 ms EN/CAL = 0.8VDDto VOUT= 0.9(VDD/2),
VDMGDM= 1 V, VL = 0V
EN/CAL Low to
EN/CAL High low time
tENLH 100 s Minimum time before externally
releasing EN/CAL (Note 1)
Amplifier On to
EN/CAL Low Setup Time
tENOL 100 s
POR Dynamic Specifications
VDDto Output Off tPHL 10 s all VL = 0V, VDD = 1.8V toVPRL 0.1V step,
90% of VOUTchange
VDDto Output On tPLH 140 250 360 ms VL = 0V, VDD = 0V to VPRH + 0.1V step,90% of VOUTchange
Note 1: For design guidance only; not tested.
TABLE 1-4: TEMPERATURE SPECIFICATIONS
Electrical Characteristics: Unless otherwise indicated, all limits are specified for: VDD = 1.8V to 5.5V, VSS = GND.
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Specified Temperature Range TA -40 +125 C
Operating Temperature Range TA -40 +125 C (Note 1)
Storage Temperature Range TA -65 +150 C
Thermal Package Resistances
Thermal Resistance, 8L-SOIC JA 150 C/W
Thermal Resistance, 8L-TDFN (23) JA 53 C/W
Note 1: Operation must not cause TJto exceed the Absolute Maximum Junction Temperature specification (+150C).
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1.3 Timing Diagrams
FIGURE 1-1: Common Mode Input
Overdrive Recovery Timing Diagram.
FIGURE 1-2: Differential Mode Input
Overdrive Recovery Timing Diagram.
FIGURE 1-3: Output Overdrive Recovery
Timing Diagram.
FIGURE 1-4: POR Timing Diagram.
FIGURE 1-5: EN/CAL Timing Diagram.
VOUT
tIRC
VDM
VCM
(1V)/GDM
VOUT
tIRD
VCM
VDM
VDD/2
VOUT
tOR
VCM
VDM
VDD/2
1.8V
VPRL 0.1V
High-ZVOUT
VDD
tPHLtPLH
VPRH + 0.1V
0V
High-ZVOUT
EN/CAL
tOFFtON
tENLH
tENOL
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1.4 DC Test Circuits
1.4.1 INPUT OFFSET TEST CIRCUIT
Figure 1-6 is used for testing the INAs input offset
errors and input voltage range (VE, VIVLand VIVH; see
Section 1.5.1 Input Offset Related Errors and
Section 1.5.2 Input Offset Common Mode Non-
linearity). U2is part of a control loop that forces VOUTto equal VCNT; U1can be set to any bias point.
FIGURE 1-6: Test Circuit for Common
Mode (Input Offset).
When MCP6N11 is in its normal range of operation, theDC output voltages are (where VEis the sum of input
offset errors and gEis the gain error):
EQUATION 1-1:
Table 1-5gives the recommended RFand RGvalues
for different GMINoptions.
1.4.2 DIFFERENTIAL GAIN TEST CIRCUIT
Figure 1-7is used for testing the INAs differential gain
error, non-linearity and input voltage range (gE, INLDM,
VDMLand VDMH; see Section 1.5.3 Differential Gain
Error and Non-linearity). RFand RGare 0.01% for
accurate gain error measurements.
FIGURE 1-7: Test Circuit for Differential
Mode.
The output voltages are (where VEis the sum of input
offset errors and gEis the gain error):
EQUATION 1-2:
To keep VREF, VFGand VOUTwithin their ranges, set:
EQUATION 1-3:
Table 1-6shows the recommended RFand RG. They
produce a 10 kload; VLcan usually be left open.
TABLE 1-5: SELECTING RFAND RGGMIN(V/V)
Nom.
RF()
Nom.
RG()
Nom.
GDM(V/V)
Nom.
GDMVOS(V)
Max.
BW
(kHz)
Nom.
1 100k 499 201.4 0.60 2.5
2 0.40 5.0
5 100k 100 1001 0.85 2.5
10 0.50 5.0
100 0.35 35
RL
VCM 100 nF
VDD
2.2 F
VREF
VL
12.7 kVM
100 nF CCNT
U1
MCP6N11
U2
MCP6H01
VCNT
63.4 k
RG
RF
RCNT63.4 k
VOUT
10 nF
1 k
1 k
GDM 1 RF RG+=
VOU T VCN T=
VM VRE F GDM1 gE+( )VE+=
TABLE 1-6: SELECTING RFAND RG
GMIN(V/V)
Nom.
RF()Nom.
RG()Nom.
GDM(V/V)
Nom.
1 0 Open 1.000
2 4.99k 4.99k 2.000
5 8.06k 2.00k 5.030
10 9.09k 1.00k 10.09
100 10.0k 100 101.0
RL
6.34 k
1 k
1 k
VCM + VDM/2
+
100 nF
VOUT
RF
RG
VM
100 nF
VDD
2.2 F
6.34 k
VREF
VFG
VL
VCM VDM/2
0.01%
0.01%
U1
MCP6N11
GDM 1 RF RG+=
VM
VOU T
VRE F
=
VOU T VRE F GDM1 gE+( ) VDM VE+( )+=
GDM1 gE+( ) VDM VE+( )=
VRE F VDD GDMVDM( ) 2=
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1.5 Explanation of DC Error Specs
1.5.1 INPUT OFFSET RELATED ERRORS
The input offset error (VE) is extracted from input offset
measurements (see Section 1.4.1 Input Offset Test
Circuit), based on Equation 1-1:
EQUATION 1-4:
VEhas several terms, which assume a linear response
to changes in VDD, VSS, VCM, VOUTand TA(all of which
are in their specified ranges):
EQUATION 1-5:
Equation 1-2shows how VEaffects VOUT.
1.5.2 INPUT OFFSET COMMON MODE
NON-LINEARITY
The input offset error (VE) changes non-linearly with
VCM. Figure 1-8shows VEvs. VCM, as well as a linearfit line (VE_LIN) based on VOSand CMRR. The op amp
is in standard conditions (VOUT = 0, VDM = 0, etc.).VCM is swept from VIVL to VIVH. The test circuit is in
Section 1.4.1 Input Offset Test Circuitand VE is
calculated using Equation 1-4.
FIGURE 1-8: Input Offset Error vs.
Common Mode Input Voltage.
Based on the measured VE data, we obtain the
following linear fit:
EQUATION 1-6:
The remaining error (VE) is described by the CommonMode Non-Linearity spec:
EQUATION 1-7:
The same common mode behavior applies to VEwhen
VREFis swept, instead of VCM, since both input stages
are designed the same:
EQUATION 1-8:
1.5.3 DIFFERENTIAL GAIN ERROR ANDNON-LINEARITY
The differential errors are extracted from differential
gain measurements (see Section 1.4.2 Differential
Gain Test Circuit), based on Equation 1-2. These
errors are the differential gain error (gE) and the input
offset error (VE, which changes non-linearly with VDM):
EQUATION 1-9:
These errors are adjusted for the expected output, then
referred back to the input, giving the differential input
error (VED) as a function of VDM:
EQUATION 1-10:
VEVM VRE F
GDM1 gE+( )---------------------------------=
Where:
PSRR, CMRRandAOLare in units of V/V
TAis in units of C
VDM= 0
VE VOS
VDD VSS
PSRR---------------------------------
VCM
CMRR-----------------
VRE F
CMRR-----------------+ + +=
VOU TAOL
----------------- TAVOSTA
-------------+ +
V1
V3
VE, VE_LIN(V)
VCM(V)
VIVL VIVHVDD/2
V2
VE_LIN
VE
VE
Where:
VE_ LI N VOS
VCM VDD 2
CMRR-----------------------------------+=
VOS V2=
1
CMRR-----------------
V3 V1
VIV H VIV L------------------------------=
Where:
INLCM
max VE
VIV H VIV L------------------------------=
VE VE VE_ LI N
=
VE_ LI N VOSVRE F VDD 2
CMRR-------------------------------------+=
INLCMma x VE
VIV H VIV L------------------------------=
GDM 1 RF RG+=
VM GDM1 gE+( ) VDM V+ E( )=
VEDVM
GDM------------ VDM=
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Figure 1-9shows VEDvs. VDM, as well as a linear fit
line (VED_LIN) based on VEand gE. The op amp is in
standard conditions (VOUT = 0, etc.). VDM is sweptfrom VDMLto VDMH.
FIGURE 1-9: Differential Input Error vs.
Differential Input Voltage.
Based on the measured VED data, we obtain the
following linear fit:
EQUATION 1-11:
Note that the VE value measured here is not asaccurate as the one obtained in Section 1.5.1 Input
Offset Related Errors.
The remaining error (VED) is described by theDifferential Mode Non-Linearity spec:
EQUATION 1-12:
V1
V3
VED, VED_LIN(V)
VDM(V)
VDML VDMH0
V2
VED_LIN
VED
VED
Where:
VED _L IN 1 gE+( )VE gEVDM+=
gE
V3 V1
VDM H VDM L----------------------------------- 1=
VEV2
1 gE+----------------=
Where:
INLDM
max VED
VDM H VDM L-----------------------------------=
VED VED VED _L IN=
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NOTES:
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MCP6N11
2.0 TYPICAL PERFORMANCE CURVES
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
2.1 DC Voltages and Currents
FIGURE 2-1: Normalized Input Offset
Voltage, with GMIN= 1 to 10.
FIGURE 2-2: Normalized Input Offset
Voltage, with GMIN= 100.
FIGURE 2-3: Normalized Input Offset
Voltage Drift, with GMIN= 1 to 10.
FIGURE 2-4: Normalized Input Offset
Voltage Drift, with GMIN= 100.
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
30%
35%
es
330 SamplesTA =
25%
30%
rrence TA +25C
VDD = 1.8V and 5.5VRTO
20%fOccu
GMIN = 1=
10%
15%
tageof MIN
5%
10%
Percent
0%
P
-2.
-1.
-1.
-0.
-0.
0.
0.
0.
1.
1.
2.
Normalized Input Offset Voltage; GMINVOS(mV)
14%
s330 SamplesGMIN = 100
10%rrence
MIN
TA = +25CVDD = 1.8V and 5.5VRTO
8%Occu
6%
ageo
2%
4%
erce
n
0%
-18
-16
-14
-12
-10 -8 -6 -4 -2 0 2 4 6 81
012141618
Normalized Input Offset Voltage; GMINVOS(mV)
25%
es No VOS Re-calibration
330 Samples
20%
urren GMIN = 1 to 10
VDD = 5.5VRTO
15%
ofOc
10%
ntage
5%
Perce
0%
600
500
400
300
200
100 0
100
200
300
400
500
600
- - - - - -Normalized Input Offset Voltage Drift;
GMIN(VOS/TA) (V/C)
16%
18%
ces No VOS Re-calibration
330 Samples
12%
14%
curren GMIN = 100
VDD = 5.5VRTO
8%
10%
ofOc
6%ntage
2%Per
c
1200
1000
-800
-600
-400
-200 0
200
400
600
800
1000
1200
- -Normalized Input Offset Voltage Drift;
GMIN(VOS/TA) (V/C)
-
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DS25073A-page 14 2011 Microchip Technology Inc.
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
FIGURE 2-5: Normalized Input Offset
Voltage vs. Power Supply Voltage, with
VCM= 0V and GMIN= 1 to 10.
FIGURE 2-6: Normalized Input Offset
Voltage vs. Power Supply Voltage, withVCM= 0V and GMIN= 100.
FIGURE 2-7: Normalized Input Offset
Voltage vs. Power Supply Voltage, with
VCM= VDDand GMIN= 1 to 10.
FIGURE 2-8: Normalized Input Offset
Voltage vs. Power Supply Voltage, with
VCM= VDDand GMIN= 100.
FIGURE 2-9: Normalized Input Offset
Voltage vs. Output Voltage, with GMIN= 1 to 10.
FIGURE 2-10: Normalized Input Offset
Voltage vs. Output Voltage, with GMIN= 100.
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
dInputOffsetVoltage;
GMINV
OS(m
V)
-40C
-2.5
-2.0
-1.5
-1.0
0.00.51.01.52.02.53.03.54.04.55.05.56.06.5
NormalizedG
Power Supply Voltage
Representative PartVCM = VSSGMIN = 1 to 10RTO
+25C+85C
+125C
20
25
ge
;
15
tVolt
5
tOffse
S
(mV)
-5dInpu
MIN
VO
-15
-10
malize
Representative PartVCM = VSS
-40C25C
-25
-20Nor GMIN = 100
RTO
85C125C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Power Supply Voltage
-
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
dInputOffsetVoltage;
MINV
OS
(mV)
Representative PartVCM = VDDGMIN = 1 to 10RTO
-40C+25C+85C+125C
-1.2
-1.0
-0.8
-0.6
- .
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
Normalize
Power Supply Voltage
-2
0
2
4
6
8
10
dInputOffsetVoltage;
GMINV
OS(m
V)
Representative PartVCM = VDDGMIN = 100RTO
-10
-8
-6
-4
0.00.51.01.52.02.53.03.54.04.55.05.56.06.5
NormalizedG
Power Supply Voltage
-40C+25C+85C+125C
-0.5
0.0
0.5
1.0
1.5
2.0
dInputOffsetVoltage;
MINV
OS
(mV)
Representative PartGMIN = 1 to 10RTO
VDD = 5.5V
VDD = 1.8V
-2.0
-1.5
-1.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Normalize
Output Voltage (V)
-1
0
1
2
3
4
5
6
dInputOffsetVoltage;
MINV
OS
(mV)
Representative PartGMIN = 100RTO
VDD = 5.5V
VDD = 1.8V
-6
-5
-4
-3
-
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Normalize
Output Voltage (V)
-
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MCP6N11
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
FIGURE 2-11: Input Common Mode
Voltage Headroom vs. Ambient Temperature.
FIGURE 2-12: Normalized Input Offset
Voltage vs. Common Mode Voltage, withVDD = 1.8V and GMIN= 1 to 10.
FIGURE 2-13: Normalized Input Offset
Voltage vs. Common Mode Voltage, with
VDD = 1.8V and GMIN= 100.
FIGURE 2-14: Normalized Input Offset
Voltage vs. Common Mode Voltage, with
VDD = 5.5V and GMIN= 1 to 10.
FIGURE 2-15: Normalized Input Offset
Voltage vs. Common Mode Voltage, withVDD = 5.5V and GMIN= 100.
FIGURE 2-16: Normalized CMRR and
PSRR vs. Ambient Temperature.
0.4
0.5
m1 Wafer Lot
VIVH VDD
0.2
0.3
eadro
0.1
.
nge
H
) VDD = 1.8V
-0.1
.
ageR( VDD = 5.5V
-0.3
-0.2
utVolt
-0.5
-0.4Inp VIVL VSS
-50 -25 0 25 50 75 100 125
Ambient Temperature (C)
-0.5
0.0
0.5
1.0
1.5
2.0
dInputOffsetVoltage;
GMINV
OS
(mV)
VDD = 1.8VRepresentative PartGMIN = 1 to 10RTO
-2.0
-1.5
-1.0
-0.5 0.0 0.5 1.0 1.5 2.0 2.5
NormalizedG
Input Common Mode Voltage (V)
+125C+85C+25C-40C
-5
0
5
10
15
dInputOffsetVoltage;
GMINV
OS
(mV)
VDD = 1.8VRepresentative PartGMIN = 100RTO
-15
-10
-5
-0.5 0.0 0.5 1.0 1.5 2.0 2.5
NormalizedG
Input Common Mode Voltage (V)
+125C+85C+25C-40C
-0.5
0.0
0.5
1.0
1.5
2.0
dInputOffsetVoltage;
GMINV
OS(m
V)
VDD = 5.5VRepresentative PartGMIN = 1 to 10RTO
+125C+85
-2.0
-1.5
-1.0
-0.50.00.51.01.52.02.53.03.54.04.55.05.56.0
NormalizedG
Input Common Mode Voltage (V)
+85C+25C-40C
-5
0
5
10
15
dInputOffsetVoltage;
GMINV
OS
(mV)
VDD = 5.5VRepresentative PartGMIN = 100RTO
-15
-10
-5
-0.50.00.51.01.52.02.53.03.54.04.55.05.56.0
NormalizedG
Input Common Mode Voltage (V)
+125C+85C+25C-40C
105
110
B) CMRR / GMIN, VDD = 1.8V:
G = 1 100
CMRR / GMIN, VDD = 5.5V:G = 1 to 10
100
PSRR;
MIN
(d,
GMIN = 2 to 10 GMIN = 100
90MRR,
RR/
80izedC
MIN,P
70
75
ormal
RR/
PSRR / G :
60
65NCM GMIN = 1 to 10
GMIN = 100
-50 -25 0 25 50 75 100 125Ambient Temperature (C)
-
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Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
FIGURE 2-17: Normalized DC Open-Loop
Gain vs. Ambient Temperature.
FIGURE 2-18: The MCP6N11 Shows No
Phase Reversal vs. Common Mode Voltage.
FIGURE 2-19: Normalized Differential
Mode Voltage Range vs. Ambient Temperature.
FIGURE 2-20: Normalized Differential Input
Error vs. Differential Voltage, with GMIN= 1.
FIGURE 2-21: Normalized Differential Input
Error vs. Differential Voltage, with
GMIN= 2 to 100.
FIGURE 2-22: The MCP6N11 Shows No
Phase Reversal vs. Differential Voltage, with
VDD = 5.5V.
105
110
in;
100
oopG
)
VDD = 5.5VVDD = 1.8V
90pen
-L
IN(d
B
80DC
OL/G
70
75
alize
GMIN = 1 to 10
60
65Nor MIN
-50 -25 0 25 50 75 100 125
Ambient Temperature (C)
5.5
6.0Representative PartV = 5.5V
4.55.0
(V)
G = 100
3.5
.
ltage GDM = 1
2.0
2.5
.
tputV
VIM = -0.20V
1.0
1.5
.
Ou VIM = VDD + 0.15V
0.0
0.5
-1.0-0.50.00.51.01.52.02.53.03.54.04.55.05.56.06.5
Non-inverting Input Voltage; VIP(V)
3.8
4.0
ut)
1 Wafer LotGMINVDMH = -GMINVDML
3.4
3.6
ialInp
DMH
( RTO
3.2
.
ferenti
;G
MIN
2.8
.
edDi
Rang
2.4
2.6
rmali
ltage
2.0
2.2NV Note: For GMIN = 1,VDMH = minimum of plot value and VDD
-50 -25 0 25 50 75 100 125
Axis Title
-2
-1
01
2
3
4
5
izedDiffer
entialInput
ror;G
MINVE
D
(mV)
Representative PartVED = (VOUT VREF)/GDM VDMGMIN = 1RTO
VDD = 1.8V
VDD = 5.5V
-5
-4
-3
-5 -4 -3 -2 -1 0 1 2 3 4 5
NormalEr
Normalized Differential Input Voltage;GMINVDM(V)
4
5
ut Representative Part
V = V V /G V
2
3
tialIn
mV) GMIN = 2 to 100
RTO
0
1
ifferen
INV
ED
(
-2
-1
izedD
ror;G
M
-
-3ormalEr
-5
- - - - -
N
Normalized Differential Input Voltage;GMINVDM(V)
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
putVoltage(V)
Representative PartVDD = 5.5VVREF = (VDD GDMVDM)/2
0.0
0.5
1.0
1.5
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7
Ou
Differential Input Voltage (V)
GMIN = 1GMIN = 2GMIN = 5GMIN = 10GMIN = 100
-
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MCP6N11
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
FIGURE 2-23: Input Bias and Offset
Currents vs. Ambient Temperature, with
VDD = +5.5V.
FIGURE 2-24: Input Bias Current vs.
Input Voltage (below VSS).
FIGURE 2-25: Input Bias and Offset
Currents vs. Common Mode Input Voltage, with
TA = +85C.
FIGURE 2-26: Input Bias and Offset
Currents vs. Common Mode Input Voltage, with
TA = +125C.
FIGURE 2-27: Output Voltage Headroom
vs. Output Current.
FIGURE 2-28: Output Voltage Headroom
vs. Ambient Temperature.
1.E-10
1.E-09
1.E-08
,OffsetCurrents(A) VDD = 5.5V
VCM = VDD
IB100p
1n
10n
1.E-12
1.E-11
25 45 65 85 105 125
InputBia
Ambient Temperature (C)
| IOS |
1p
10p
1 E 09
1.E-08
1.E-07
1.E-06
1.E-05
1.E-04
1.E-03
urrentMagnitude(A)
+125C+85C+25C-40
1m
100
10
1
100n
10n
1n
1.E-12
1.E-11
1.E-10
1.E-09
-1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0
InputCu
Input Voltage (V)
-40 C1n
100p
10p
1p
-20
0
20
40
60
80
100
s,OffsetCurrents(pA) Representative Part
TA = +85CVDD = 5.5V
IB
IOS
-100
-80
-60
-40
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
InputBias
Common Mode Input Voltage (V)
1 0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
s,OffsetCurrents(nA) Representative Part
TA = +125CVDD = 5.5V
IB
IOS
-2.5
-2.0
-1.5
-1.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
InputBias
Common Mode Input Voltage (V)
1000
V)
om(
VDD = 5.5V
eadr DD
= .
ltage VDD VOH
putVo VOL VSS
10
Out
0.1 1 10Output Current Magnitude (mA)
9
10
8
(mV)
VDD VOH
6room VDD = 5.5V
4tHea
2
3
Outpu VDD = 1.8V
0
1VOL VSS
-50 -25 0 25 50 75 100 125
Ambient Temperature (C)
-
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DS25073A-page 18 2011 Microchip Technology Inc.
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
FIGURE 2-29: Output Short Circuit Current
vs. Power Supply Voltage.
FIGURE 2-30: Supply Current vs. Power
Supply Voltage.
FIGURE 2-31: Supply Current vs. Common
Mode Input Voltage.
-10
0
10
20
30
40
50
ortCircuitCurrent(mA)
+125C+85C+25C-40C
-50
-40
-30
-20
0.00.51.01.52.02.53.03.54.04.55.05.56.06.5
OutputSho
Power Supply Voltage (V)
400
500
600
700
800
900
1000
1100
plyCurrent(A)
+125C+85C+25C40
0
100
200
300
0.00.51.01.52.02.53.03.54.04.55.05.56.06.5
Sup
Power Supply Voltage (V)
-40C
1000
1100
800
900
A) VDD = 5.5V
600
700
rren
t(
VDD = 1.8V
400
500
plyCu
200
300Sup
0
100
-0.50.00.51.01.52.02.53.03.54.04.55.05.56.0
Common Mode Input Voltage (V)
-
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MCP6N11
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
2.2 Frequency Response
FIGURE 2-32: CMRR vs. Frequency.
FIGURE 2-33: PSRR vs. Frequency.
FIGURE 2-34: Normalized Open-Loop
Gain vs. Frequency.
FIGURE 2-35: Normalized Gain Bandwidth
Product and Phase Margin vs. Ambient
Temperature.
FIGURE 2-36: Closed-Loop Output
Impedance vs. Frequency.
FIGURE 2-37: Gain Peaking vs.
Normalized Capacitive Load.
40
50
60
70
80
90
100
CMRR(dB)
G = 1
VDD = 5.5V
0
10
20
30
1.E+03 1.E+04 1.E+05 1.E+06
Frequency (Hz)
GMIN = 2GMIN = 5
GMIN = 10GMIN = 100
1k 10k 100k 1M
110
120VDD = 5.5V
90
100
70
80
(dB)
50PSR
20
30GMIN = 1GMIN = 2G = 5
0
10GMIN = 10
GMIN = 100
1.E+03 1.E+04 1.E+05 1.E+06
Frequency (Hz)
1k 10k 100k 1M
-90
-60
100
120
nn
-
-12080pGai
()p
Gai
N
(dB)
AOL/GMIN
-18040en-Lo
L/G
MIN
en-Lo
OL/G
MI
| AOL/GMIN |
-240
-
0edO
se;A
edO
ude;
-300
-270
-40
-20
rmaliPh
rmali
Magnit
GMIN = 1GMIN = 2
=
-360
-330
-80
-60 NNMIN
GMIN = 10
GMIN = 100
1.E+4 1.E+5 1.E+6 1.E+7
Frequency (Hz)
10k 100k 1M 10M
140
150
0.45
0.50
)
1300.40
)ndwith
(MHz
1100.30
.
argin(
ainBa
P/G
MI
GMIN = 1GMIN = 2 GBWP
900.20
.
aseM
izedG
;GB
GMIN = 5GMIN = 10
GMIN = 100 PM
70
80
0.10
0.15 Ph
ormal
roduc
50
60
0.00
0.05NP
-50 -25 0 25 50 75 100 125
Ambient Temperature (C)
1.E+04
ce
10k
pedan
G /G = 10 GMIN = 1 to 10
1.E+03
putIm
)
1k
opOu( GMIN = 100
. +
ed-Lo
+Clo
GDM/GMIN = 1.
1.E+03 1.E+04 1.E+05 1.E+06 1.E+07
Frequency (Hz)
1k 10k 100k 1M 10M
7
G = G = 1 GMIN = 10
5B)
= 2= 5
= 10
GDM = 20= 50
4ing(d = 100
3nPea GMIN = 100
GDM = 200= 500
2Gai
1
1.E+1 1.E+2 1.E+3Normalized Capacitive Load; CL(GMIN/GDM) (F)
10p 100p 1n
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DS25073A-page 20 2011 Microchip Technology Inc.
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
2.3 Noise
FIGURE 2-38: Normalized Input Noise
Voltage Density vs. Frequency.
FIGURE 2-39: Normalized Input NoiseVoltage Density vs. Input Common Mode
Voltage, with f = 100 Hz.
FIGURE 2-40: Normalized Input Noise
Voltage Density vs. Input Common Mode
Voltage, with f = 10 kHz.
FIGURE 2-41: Normalized Input Noise
Voltage vs. Time, with GMIN= 1 to 10.
FIGURE 2-42: Normalized Input NoiseVoltage vs. Time, with GMIN= 100.
1000
ge
1mRTO
100eVolt
/Hz)
100
tNois
Neni(V GMIN = 100
dInpu
ty;G
MI
1
maliz
Densi
1GMIN = 10
GMIN = 5G = 2
0.1Nor
100n
GMIN = 1
1.E-1 1.E+0 1.E+1 1.E+2 1.E+3 1.E+4 1.E+5 1.E+6
Frequency (Hz)
0.1 100 1k1 10 100k 1M10k
14
e
10Voltag
Hz)
=
8Noise
ni(V/
VDD = 1.8VVDD = 5.5V
MIN GMIN = 10GMIN = 5
=
6Input
;G
MINe MIN
GMIN = 1
4
alized
ensity
0NorD f = 100 Hz
RTO
-0.50.00.51.01.52.02.53.03.54.04.55.05.56.0
Common Mode Input Voltage (V)
4.0
e
3.0
.
Voltag
Hz)
2.5
Noise
ni(V/
VDD = 1.8VVDD = 5.5V
GMIN = 100GMIN = 10GMIN = 5
1.5
.
Input
;G
MINe GMIN = 2
GMIN = 1
1.0
alized
ensity
0.0
.
No
rD f = 10 kHz
RTO
-0.50.00.51.01.52.02.53.03.54.04.55.05.56.0
Common Mode Input Voltage (V)
0.4
0.5Representative PartGMIN = 1 to 10
Analog NPBW = 0.1 HzSample Rate = 4 SPS
0.3
oise;
)
RTO
0.1
.
nput
t)(mV
-0.1
.
lizedI
MINeni(
-0.3
-0.2
Norm
-0.5
-0.4
0 5 10 15 20 25 30 35
Time (min)
2.0Representative PartGMIN = 100
Analog NPBW = 0.1 HzSample Rate = 4 SPS
1.0
.
oise;
)
RTO
0.5
nput
t)(mV
-0.5
.
lizedI
MINeni(
-1.0
Norm
-2.0
-1.5
0 5 10 15 20 25 30 35
Time (min)
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MCP6N11
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
2.4 Time Response
FIGURE 2-43: Small Signal Step
Response.
FIGURE 2-44: Large Signal StepResponse.
FIGURE 2-45: Slew Rate vs. Ambient
Temperature.
FIGURE 2-46: Maximum Output Voltage
Swing vs. Frequency.
FIGURE 2-47: Common Mode InputOverdrive Recovery Time vs. Normalized Gain.
FIGURE 2-48: Differential Input Overdrive
Recovery Time vs. Normalized Gain.
)
VDD = 5.5VGDM = GMIN
V/div RF + RG = 10 k
e(10
=
Voltag MIN
GMIN = 100
utput
0 2 4 6 8 10 12 14 16 18 20
Time (s)
5.0
5.5
)
VDD = 5.5VGDM = GMIN
4.0
4.5
V/div RF + RG = 10 k
3.0
3.5
e(10
2.0
2.5
Voltag GMIN = 1 to 10
GMIN = 100
1.0
1.5
utput
0.0
0.5
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Time (s)
9
10
8)
6e(V/
4ewRa GMIN = 1 to 1 0
GMIN = 100
DD .VDD = 1.8V
2
3Sl
0
1
-50 -25 0 25 50 75 100 125
Ambient Temperature (C)
10
ing
geSw VDD = 5.5V
tVolta
-P) VDD = 1.8V
Outpu(V
P
GMIN = 1 to 10GMIN = 100
imum
0Max
1.E+4 1.E+5 1.E+6Frequency (Hz)
10k 100k 1M
1000
es)
GDMVDM = 1V
Volta
tIRC
(
VDD = 5.5V
Mode
overy;
VDD = 1.8V
10mmon
eRec
putC
erdri
GMIN = 100
1
InOGMIN = 1
GMIN = 10
1 10 100Normalized Gain; GDM/GMIN
1000
ges)
eVolt
tIRD
(
V = 5.5V100
lMod
overy;
VDD = 1.8V
.
erenti
eRec
utDiff
verdri
GMIN = 100
1
InO
GMIN = 1
GMIN = 10
1 10 100
Normalized Gain; GDM/GMIN
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DS25073A-page 22 2011 Microchip Technology Inc.
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
FIGURE 2-49: Output Overdrive Recovery
Time vs. Normalized Gain.
FIGURE 2-50: The MCP6N11 Shows No
Phase Reversal vs. Common Mode InputOverdrive, with VDD = 5.5V.
FIGURE 2-51: The MCP6N11 Shows No
Phase Reversal vs. Differential Input Overdrive,
with VDD = 5.5V.
100
1000
tOverdriveRecovery;
tOR
(s
)
GMIN = 10
GDM = 2GMINVREF = 0.75VDD
GMIN = 1VDD = 1.8V
VDD = 5.5V
1
1 10 100
Outpu
Normalized Gain; GDM/GMIN
GMIN = 100
6
ut VDD = 5.5V
G V = +0.1VVCM
4,Outp
.f = 10 kHz
3Mode
es(V)
2
mmon
Voltag
1
putCo VOUT, GMIN = 1
VOUT, GMIN = 100
-1
In
0 10 20 30 40 50 60 70 80 90 100
Time (s)
4VDD = 5.5V VIP
2es(V)
1Volta V
OUT
, GMIN
= 1VOUT, GMIN = 100
-1utput
-2
nput,
-4
-3I
VIM
0 10 20 30 40 50 60 70 80 90 100
Time (s)
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MCP6N11
Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
2.5 Enable/Calibration and POR Responses
FIGURE 2-52: EN/CAL and Output Voltage
vs. Time, with VDD = 1.8V.
FIGURE 2-53: EN/CAL and Output Voltage
vs. Time, with VDD = 5.5V
FIGURE 2-54: EN/CALHysteresis vs.
Ambient Temperature.
FIGURE 2-55: EN/CAL Turn On Time vs.
Ambient Temperature.
FIGURE 2-56: Power Supply On and Off
and Output Voltage vs. Time.
FIGURE 2-57: POR Trip Voltages and
Hysteresis vs. Temperature.
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
,OutputVoltage(V
)VDD = 1.8VVL = 0V
INAturns off
CalibrationStarts
INAturns on
-0.2
0.0
0.2
0.4
0 10 20 30 40 50 60 70 80 90 100
EN/CAL
Time (ms)
EN/CAL VOUT
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
,OutputVoltage(V)
VDD = 5.5VVL = 0V
INAturns off
CalibrationStarts
INAturns on
-0.5
0.0
0.5
1.0
1.5
0 10 20 30 40 50 60 70 80 90 100
EN/CAL
Time (ms)
EN/CAL VOUT
0.55
0.60
0.45
0.50
s(V)
VDD = 5.5V
0.35
0.40
teresi
0.25
.
LHy
0.10
0.15
.
EN/C
VDD = 1.8V
0.00
0.05
.
-50 -25 0 25 50 75 100 125
Ambient Temperature (C)
30
s)
25
;tO
N(
VDD = 5.5V
20
Time
VDD = 1.8V
urnO
CALT
0
EN
-50 -25 0 25 50 75 100 125
Ambient Temperature (C)
1.6
1.8
(V)
VL = 0V
1 2
1.4
oltag
1.0
.
utput
On
0.6
.
ply,O
VDD VOUT
0.2
0.4
erSup
-0.2
0.0Pow Calibrating
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Time (s)
0.08
0.10
0.12
0.14
0.16
0.18
1.2
1.3
1.4
1.5
1.6
1.7
Hysteresis(V)
TripVoltages(V)
VPRH VPRL
VPRH
0.00
0.02
0.04
.
0.8
0.9
1.0
.
-50 -25 0 25 50 75 100 125
PO
POR
Ambient Temperature (C)
VPRL
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Note: Unless otherwise indicated, TA= +25C, VDD= 1.8V to 5.5V, VSS= GND, EN/CAL = VDD, VCM= VDD/2, VDM = 0V,
VREF = VDD/2, VL = VDD/2, RL= 10 kto VL, CL= 60 pF and GDM= GMIN; see Figure 1-6and Figure 1-7.
FIGURE 2-58: Quiescent Current in
Shutdown vs. Power Supply Voltage.
FIGURE 2-59: Output Leakage Current vs.
Output Voltage.
0.0
nt; EN/CAL = 0V
-0.5
Curr
-1.0Suppl
A)
-1.5owerIS
S
(
-2.0ative
+125C+85C
-2.5Neg
+25C-40C
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
Power Supply Voltage (V)
1.E-07
)EN/CAL = 0VVDD = 5.5V
100n
1.E-08
ent(A
+125C10n
1.E-09eC
ur
+85C1n
1.E-10eaka
100p
1.E-11utput
10p
1.E-12
O +25C
1
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Output Voltage (V)
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MCP6N11
3.0 PIN DESCRIPTIONS
Descriptions of the pins are listed in Table 3-1.
3.1 Analog Signal InputsThe non-inverting and inverting inputs (VIP, and VIM)
are high-impedance CMOS inputs with low bias
currents.
3.2 Analog Feedback Input
The analog feedback input (VFG) is the inverting input
of the second input stage. The external feedback
components (RFand RG) are connected to this pin. It is
a high-impedance CMOS input with low bias current.
3.3 Analog Reference Input
The analog reference input (VREF) is the non-invertinginput of the second input stage; it shifts VOUT to its
desired range. The external gain resistor (RG) is
connected to this pin. It is a high-impedance CMOS
input with low bias current.
3.4 Analog Output
The analog output (VOUT) is a low-impedance voltage
output. It represents the differential input voltage
(VDM = VIP VIM), with gain GDM and is shifted by
VREF. The external feedback resistor (RF) is connected
to this pin.
3.5 Power Supply PinsThe positive power supply (VDD) is 1.8V to 5.5V higher
than the negative power supply (VSS). For normal
operation, the other pins are between VSSand VDD.
Typically, these parts are used in a single (positive)
supply configuration. In this case, VSSis connected to
ground and VDD is connected to the supply; VDDwill
need bypass capacitors.
3.6 Digital Enable and VOSCalibration
Input
This input (EN/CAL) is a CMOS, Schmitt-triggered
input that controls the active, low power and VOScalibration modes of operation. When this pin goes low,
the part is placed into a low power mode and the output
is high-Z. When this pin goes high, the amplifiers input
offset voltage is corrected by the calibration circuitry,
then the output is re-connected to the VOUTpin, which
becomes low impedance, and the part resumes normal
operation.
3.7 Exposed Thermal Pad (EP)
There is an internal connection between the Exposed
Thermal Pad (EP) and the VSS pin; they must be
connected to the same potential on the Printed Circuit
Board (PCB).This pad can be connected to a PCB ground plane to
provide a larger heat sink. This improves the package
thermal resistance (JA).
TABLE 3-1: PIN FUNCTION TABLE
MCP6N11Symbol Description
SOIC TDFN1 1 VFG Feedback Input
2 2 VIM Inverting Input
3 3 VIP Non-inverting Input
4 4 VSS Negative Power Supply
5 5 VREF Reference Input
6 6 VOUT Output
7 7 VDD Positive Power Supply
8 8 EN/CAL Enable/VOSCalibrate Digital Input
9 EP Exposed Thermal Pad (EP); must be connected to VSS
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NOTES:
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MCP6N11
4.0 APPLICATIONS
The MCP6N11 instrumentation amplifier (INA) is
manufactured using Microchips state of the art CMOS
process. It is low cost, low power and high speed,
making it ideal for battery-powered applications.
4.1 Basic Performance
4.1.1 STANDARD CIRCUIT
Figure 4-1shows the standard circuit configuration for
these INAs. When the inputs and output are in their
specified ranges, the output voltage is approximately:
EQUATION 4-1:
FIGURE 4-1: Standard Circuit.
For normal operation, keep:
VIP, VIM, VREFand VFGbetween VIVLand VIVH
VIP VIM(i.e., VDM) between VDMLand VDMH VOUTbetween VOLand VOH
4.1.2 ARCHITECTURE
Figure 4-2shows the block diagram for these INAs.
FIGURE 4-2: MCP6N11 Block Diagram.
The input offset voltage (VOS) is corrected by the
voltage VTR. Each time a VOSCalibration event occurs,
VTR is updated to the best value (at that moment).
These events are triggered by either powering up
(monitored by the POR) or by toggling the EN/CAL pin
high. The current out of GM3(I3) is constant and very
small (assumed to be zero in the following discussion).
The input signal is applied to GM1. Equation 4-2shows
the relationships between the input voltages (VIPand
VIM) and the common mode and differential voltages
(VCMand VDM).
EQUATION 4-2:
The negative feedback loop includes GM2, RM4, RFand
RG. These blocks set the DC open-loop gain (AOL) and
the nominal differential gain (GDM):
EQUATION 4-3:
AOLis very high, so I4is very small and I1+ I20. Thismakes the differential inputs to GM1and GM2equal in
magnitude and opposite in polarity. Ideally, this gives:
EQUATION 4-4:
For an ideal part, changing VCM, VSSor VDDproduces
no change in VOUT. VREFshifts VOUTas needed.
The different GMINoptions change GM1, GM2and the
internal compensation capacitor. This results in the
performance trade-offs shown in Table 1.
VOUT VREF + GDMVDMWhere:
GDM = 1 + RF / RG
VOUT
VIP
VDD
VIM
VREF
VFGRF
RG
U1
MCP6N11
RF VFG
VOUT
Low Power
VSSVDD
EN/CAL
VOUT
VOS Calibration
VREF
RM4
GM2 I2VREF
I4
GM3
I3
VTR
RG
VIP
VIM
GM1
I1VIP
VIM
POR
VIP VCM VDM 2+=
VIM VCM VDM 2=
VCM VIP VIM+( ) 2=
VDM VIP VIM=
AOL GM2RM4=
GDM 1 RF RG+=
VFG VRE F( ) VDM=
VOU T VDMGDM VRE F+=
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4.1.3 DC ERRORS
Section 1.5 Explanation of DC Error Specs
defines some of the DC error specifications. These
errors are internal to the INA, and can be summarized
as follows:
EQUATION 4-5:
The non-linearity specs (INLCM and INLDM) describe
errors that are non-linear functions of VCMand VDM,
respectively. They give the maximum excursion from
linear response over the entire common mode and
differential ranges.
The input bias current and offset current specs (IBand
IOS), together with a circuits external input resistances,
give an additional DC error. Figure 4-3 shows the
resistors that set the DC bias point.
FIGURE 4-3: DC Bias Resistors.
The resistors at the main input (RIPand RIM) and its
input bias currents (IBP
and IBM
) give the following
changes in the INAs bias voltages:
EQUATION 4-6:
The best design results when RIPand RIMare equal
and small:
EQUATION 4-7:
The resistors at the feedback input (RR, RFand RG)
and its input bias currents (IBR and IBF) give the
following changes in the INAs bias voltages:
EQUATION 4-8:
The best design results when GDMRRand RFare equaland small:
EQUATION 4-9:
Where:
VOU T VRE F GDM1 gE+( ) VDM VED+( )+=
GDM1 gE+( ) VE VE+( )+
Where:
PSRR, CMRRandAOLare in units of V/V
TAis in units of C
VE VOS
VDD VSS
PSRR---------------------------------
VCM
CMRR-----------------
VRE F
CMRR-----------------+ + +=
VOU T
AOL----------------- TA
VOS
TA-------------+ +
VED INLDMVDM H VDM L( )
VE INLCMVIV H VIV L( )
VOUT
VIP
VDD
VIM
VREF
RF
RG
RIP
RIM
RR
IBP
IBM VFG
IBF
IBR
U1
MCP6N11
Where:
CMRR is in units of V/V
VIP IBPRIP IBIOS
2--------
RIP= =
VIM IBMRIM IBIOS
2--------+
RIM= =
VCM
VIP VIM+
2---------------------------------=
IBRIP RIM+
2-------------------------
I OS2
-----------R IP RIM+
2----------------------------
+=
VDM VIP VIM=
IB R IP RIM+( ) IOS
2-------- RIP RIM+( )=
VOU T GDM VDM
VCM
CMRR-----------------+
=
Where:
RIP= RIM
RTOL = tolerance of RIPand RIM
VOU T GDMVDM
GDM 2IBRT OL IOS( )RIP
Where:
IB2meets the IBspec, but is not equal to IB
IOS2meets the IOSspec, but is not equal to IOS
VRE F IBRRR IB2IOS2
2----------
RR= =
VFG VRE F,
VOU T IB2 RF GDMRR( ) IOS2
2---------- RF GDMRR+( )+
due to highAOL
Where:
GDMRR= RF
RTOL = tolerance of RR, RFand RG
VOU T 2IB2RT OL IOS2+( )( )RF
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MCP6N11
4.1.4 AC PERFORMANCE
The bandwidth of these amplifiers depends on GDMand GMIN:
EQUATION 4-10:
The bandwidth at the maximum output swing is called
the Full Power Bandwidth (fFPBW). It is limited by the
Slew Rate (SR) for many amplifiers, but is close to fBWfor these parts:
EQUATION 4-11:
CMRR is constant from DC to about 1 kHz.
4.1.5 NOISE PERFORMANCE
As shown in Figures 2-41 and 2-42, the 1/f noise
causes an apparent wander in the DC output voltage.Changing the measurement time or bandwidth has little
effect on this noise.
We recommend re-calibrating VOS periodically, to
reduce 1/f noise wander. For example, VOScould be
re-calibrated at least once every 15 minutes; more
often when temperature or VDDchange significantly.
4.2 Functional Blocks
4.2.1 RAIL-TO-RAIL INPUTS
Each input stage uses one PMOS differential pair at the
input. The output of each differential pair is processed
using current mode circuitry. The inputs show no
crossover distortion vs. common mode voltage.
With this topology, the inputs (VIP and VIM) operate
normally down to VSS 0.2V and up to VDD + 0.15V at
room temperature (see Figure 2-11). The input offset
voltage (VOS) is measured at VCM = VSS 0.2V and
VDD + 0.15V (at +25C), to ensure proper operation.
4.2.1.1 Phase Reversal
The input devices are designed to not exhibit phase
inversion when the input pins exceed the supply
voltages. Figures 2-18and 2-50show an input voltage
exceeding both supplies with no phase inversion.
The input devices also do not exhibit phase inversion
when the differential input voltage exceeds its limits;
see Figures 2-22and 2-51.
4.2.1.2 Input Voltage Limits
In order to prevent damage and/or improper operation
of these amplifiers, the circuit must limit the voltages at
the input pins (see Section 1.1 Absolute Maximum
Ratings ). This requirement is independent of the
current limits discussed later on.
The ESD protection on the inputs can be depicted as
shown in Figure 4-4. This structure was chosen to
protect the input transistors against many (but not all)
overvoltage conditions, and to minimize input bias
current (IB).
FIGURE 4-4: Simplified Analog Input ESDStructures.
Where:
fBW= -3 dB bandwidth
fGBWP= Gain bandwidth product
fBW
fGBWP
GDM---------------
0.50 MHz( ) GMI N GDM( ),
0.35 MHz( ) GMI N GDM( ),
GMIN= 1, , 10
GMIN= 100
Where:
VO = Maximum output voltage swing
VOH VOL
fFP BWSR
VO----------
fBW , for these parts
Bond
Pad
Bond
Pad
Bond
Pad
VDD
VIP
VSS
InputStage
Bond
PadVIM
ofINA Input
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The input ESD diodes clamp the inputs when they try
to go more than one diode drop below VSS. They also
clamp any voltages that go too far above VDD; their
breakdown voltage is high enough to allow normal
operation, but not low enough to protect against slow
overvoltage (beyond VDD) events. Very fast ESD
events (that meet the spec) are limited so that damage
does not occur.
In some applications, it may be necessary to prevent
excessive voltages from reaching the op amp inputs.
Figure 4-5 shows one approach to protecting these
inputs. D1and D2may be small signal silicon diodes,
Schottky diodes for lower clamping voltages or diode-
connected FETs for low leakage.
FIGURE 4-5: Protecting the Analog Inputs
Against High Voltages.
4.2.1.3 Input Current Limits
In order to prevent damage and/or improper operation
of these amplifiers, the circuit must limit the currents
into the input pins (see Section 1.1 Absolute Maxi-
mum Ratings ). This requirement is independent of
the voltage limits previously discussed.
Figure 4-6 shows one approach to protecting theseinputs. The resistors R1 and R2 limit the possible
current in or out of the input pins (and into D1and D2).
The diode currents will dump onto VDD.
FIGURE 4-6: Protecting the Analog Inputs
Against High Currents.
It is also possible to connect the diodes to the left of the
resistor R1and R2. In this case, the currents through
the diodes D1and D2need to be limited by some other
mechanism. The resistors then serve as in-rush current
limiters; the DC current into the input pins (VIPand VIM)
should be very small.
A significant amount of current can flow out of the
inputs (through the ESD diodes) when the common
mode voltage (VCM) is below ground (VSS); see
Figure 2-25.
4.2.1.4 Input Voltage Ranges
Figure 4-7 shows possible input voltage values
(VSS = 0V). Lines with a slope of +1 have constant VDM(e.g., the VDM = 0 line). Lines with a slope of -1 have
constant VCM(e.g., the VCM = VDD/2 line).
For normal operation, VIPand VIMmust be kept within
the region surrounded by the thick blue lines. The
horizontal and vertical blue lines show the limits on the
individual inputs. The blue lines with a slope of +1 show
the limits on VDM; the larger GMINis, the closer they areto the VDM = 0 line.
The input voltage range specs (VIVLand VIVH) change
with the supply voltages (VSSand VDD, respectively).
The differential input range specs (VDML and VDMH)
change with minimum gain (GMIN). Temperature also
affects these specs.
To take full advantage of VDML and VDMH, set VREF(see Figure 1-6 and Figure 1-7) so that the output
(VOUT) is centered between the supplies (VSS and
VDD).
FIGURE 4-7: Input Voltage Ranges.
VDD
V1
D1
V2
D2
U1
MCP6N11
min(R1, R2) >VSS min(V1, V2)
2 mA
VDD
V1R1
D1
V2R2
D2
U1
MCP6N11
min(R1, R2) >max(V1, V2) VDD
2 mA
VIP
VIM
VDM=0
VIVH
VIVL
0
VIVH
VIVL
0
VDM=VD
MH
VCM=
VDD/2
VDM=VD
MH
VDD
VDD
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MCP6N11
4.2.2 ENABLE/VOSCALIBRATION
(EN/CAL)
These parts have a Normal mode, a Low Power mode
and a VOSCalibration mode.
When the EN/CAL pin is high and the internal POR
(with delay) indicates that power is good, the part
operates in its Normal mode.When the EN/CAL pin is low, the part operates in its
Low Power mode. The quiescent current (at VSS) drops
to -2.5 A (typical), the amplifier output is put into a
high-impedance state. Signals at the input pins can
feed through to the output pin.
When the EN/CAL pin goes high and the internal POR
(with delay) indicates that power is good, the amplifier
internally corrects its input offset voltage (VOS) with the
internal common mode voltage at mid-supply (VDD/2)
and the output tri-stated (after tOFF). Once VOSCalibra-
tion is completed, the amplifier is enabled and normal
operation resumes.
The EN/CAL pin does not operate normally when leftfloating. Either drive it with a logic output, or tie it high
so that the part is always on.
4.2.3 POR WITH DELAY
The internal POR makes sure that the input offset
voltage (VOS) is calibrated whenever the supply
voltage goes from low voltage (< VPRL) to high voltage
(> VPRH). This prevents corruption of the VOStrim reg-
isters after a low-power event.
After the POR goes high, the internal circuitry adds a
fixed delay (tPLH), before telling the VOS Calibration
circuitry (see Figure 4-2) to start. If the EN/CAL pin is
toggled during this time, the fixed delay is restarted(takes an additional time tPLH).
4.2.4 PARITY DETECTOR
A parity error detector monitors the memory contents
for any corruption. In the rare event that a parity error is
detected (e.g., corruption from an alpha particle), a
POR event is automatically triggered. This will cause
the input offset voltage to be re-corrected, and the op
amp will not return to normal operation for a period of
time (the POR turn on time, tPLH).
4.2.5 RAIL-TO-RAIL OUTPUT
The Minimum Output Voltage (VOL
) and Maximum
Output Voltage (VOH) specs describe the widest output
swing that can be achieved under the specified load
conditions.
The output can also be limited when VIPor VIMexceeds
VIVLor VIVH, or when VDMexceeds VDMLor VDMH.
4.3 Applications Tips
4.3.1 MINIMUM STABLE GAIN
There are different options for different Minimum Stable
Gains (1, 2, 5, 10 and 100 V/V; see Table 1-1). The
differential gain (GDM) needs to be greater than or
equal to GMINin order to maintain stability.
Picking a part with higher GMINhas the advantages of
lower Input Noise Voltage Density (eni), lower Input
Offset Voltage (VOS) and increased Gain Bandwidth
Product (GBWP); see Table 1. The Differential Input
Voltage Range (VDMR) is lower for higher GMIN, but the
output voltage range would limit VDMRanyway, when
GDM 2.
4.3.2 CAPACITIVE LOADS
Driving large capacitive loads can cause stability
problems for amplifiers. As the load capacitance
increases, the feedback loops phase margin
decreases, and the closed-loop bandwidth is reduced.
This produces gain peaking in the frequency response,with overshoot and ringing in the step response. Lower
gains (GDM) exhibit greater sensitivity to capacitive
loads.
When driving large capacitive loads with these
instrumentation amps (e.g., > 100 pF), a small series
resistor at the output (RISOin Figure 4-8) improves the
feedback loops phase margin (stability) by making the
output load resistive at higher frequencies. The
bandwidth will be generally lower than the bandwidth
with no capacitive load.
FIGURE 4-8: Output Resistor, RISO
stabilizes large capacitive loads.
Figure 4-9 gives recommended RISO values for
different capacitive loads and gains. The x-axis is the
normalized load capacitance (CL GMIN/GDM), where
GDMis the circuits differential gain (1 + RF / RG) and
GMINis the minimum stable gain.
RISOVOUT
CL
V1
VDD
V2
VREF
VFGRF
RG
U1
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FIGURE 4-9: Recommended RISOValues
for Capacitive Loads.
After selecting RISOfor your circuit, double check the
resulting frequency response peaking and step
response overshoot on the bench. Modify R ISOs value
until the response is reasonable.
4.3.3 GAIN RESISTORS
Figure 4-10shows a simple gain circuit with the INAs
input capacitances at the feedback inputs (VREF and
VFG). These capacitances interact with RGand RFto
modify the gain at high frequencies. The equivalent
capacitance acting in parallel to RGis CG = CDM + CCMplus any board capacitance in parallel to RG. CGwill
cause an increase in GDMat high frequencies, which
reduces the phase margin of the feedback loop (i.e.,
reduce the feedback loop's stability).
FIGURE 4-10: Simple Gain Circuit with
Parasitic Capacitances.
In this data sheet, RF + RG = 10 kfor most gains (0for GDM = 1); see Table 1-6. This choice gives good
Phase Margin. In general, RF (Figure 4-10) needs to
meet the following limits to maintain stability:
EQUATION 4-12:
4.3.4 SUPPLY BYPASS
With these INAs, the power supply pin (VDDfor single
supply) should have a local bypass capacitor (i.e.,
0.01 F to 0.1 F) within 2 mm for good high frequency
performance. Surface mount, multilayer ceramic
capacitors, or their equivalent, should be used.
These INAs require a bulk capacitor (i.e., 1.0 F or
larger) within 100 mm, to provide large, slow currents.
This bulk capacitor can be shared with other nearby
analog parts as long as crosstalk through the supplies
does not prove to be a problem.
1.E+03
1.E+04
m
mendedR
ISO
()
10k
1k
1.E+02
1.E-10 1.E-09 1.E-08 1.E-07 1.E-06
Rec
Normalized Load Capacitance;CL GMIN/GDM(F)
100
100p 1n 10n 100n 1
GMIN = 1 to 10GMIN = 100
VOUT
V1
VDD
V2
VREF
VFGRF
RGCDMCCM
CCM
U1
MCP6N11
Where:
0.25
GDM GMIN
fGBWP= Gain Bandwidth Product
CG = CDM+ CCM+ (PCB stray capacitance)
RF 0=For GDM= 1:
RF
GDM2
2fGBWPCG------------------------------ 1:
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4.4 Typical Applications
4.4.1 HIGH INPUT IMPEDANCE
DIFFERENCE AMPLIFIER
Figure 4-11shows the MCP6N11 used as a difference
amplifier. The inputs are high impedance and give good
CMRR performance.
FIGURE 4-11: Difference Amplifier.
4.4.2 DIFFERENCE AMPLIFIER FOR
VERY LARGE COMMON MODE
SIGNALS
Figure 4-12 shows the MCP6N11 INA used as a
difference amplifier for signals with a very large
common mode component. The input resistor dividers
(R1and R2) ensure that the voltages at the INAs inputs
are within their range of normal operation. The
capacitors C1, with the parasitic capacitances C2(the
resistors parasitic capacitance plus the INAs input
common mode capacitance, CCM), set the same
division ratio, so that high-frequency signals (e.g., a
step in voltage) have the same gain. Select the INA
gain to compensate for R1and R2s attenuation. SelectR1and R2s tolerances for good CMRR.
FIGURE 4-12: Difference Amplifier with
Very Large Common Mode Component.
4.4.3 HIGH SIDE CURRENT DETECTOR
Figure 4-13shows the MCP6N11 INA used as to detect
and amplify the high side current in a battery powered
design. The INA gain is set at 21 V/V, so VOUTchanges
210 mV for every 1 mA of IDDcurrent. The best GMINoption to pick would be a gain of 10 (MCP6N11-010).
FIGURE 4-13: High Side Current Detector.
4.4.4 WHEATSTONE BRIDGE
Figure 4-14 shows the MCP6N11 single
instrumentation amp used to condition the signal from
a Wheatstone bridge (e.g., strain gage). The overall
INA gain is set at 201 V/V. The best GMINoption to pick,
for this gain, is 100 V/V (MCP6N11-100).
FIGURE 4-14: Wheatstone BridgeAmplifier.
VOUT
VIP
VDD
VIM
VREF
VFGRF
RG
U1
MCP6N11
VOUT
VDD
VREF
VFGRF
RG
R2R1
V2
C1 C2
R2R1V1
C1 C2
U1
MCP6N11
IDD = (VBAT VDD)(10)
=(VOUT VREF)
(10) (21.0 V/V)
10VDD
IDD
VBAT+1.8V
to+5.5V
VOUT
VREF
VFG
RF
RG
200 k
10 k
U1
MCP6N11
VOUT
VREF
VFG
RF
RG
200 k
1 k
VDD
RW1RW2
RW2RW1U1
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5.0 DESIGN AIDS
Microchip provides the basic design aids needed for
the MCP6N11 instrumentation amplifiers.
5.1 Microchip Advanced Part Selector
(MAPS)
MAPS is a software tool that helps efficiently identify
Microchip devices that fit a particular design
requirement. Available at no cost from the Microchip
website at www.microchip.com/maps, the MAPS is an
overall selection tool for Microchips product portfolio
that includes Analog, Memory, MCUs and DSCs. Using
this tool, a customer can define a filter to sort features
for a parametric search of devices and export
side-by-side technical comparison reports. Helpful links
are also provided for Data sheets, Purchase and
Sampling of Microchip parts.
5.2 Analog Demonstration Board
Microchip offers a broad spectrum of Analog
Demonstration and Evaluation Boards that are
designed to help customers achieve faster time
to market. For a complete listing of these boards
and their corresponding users guides and technical
information, visit the Microchip web site at
www.microchip.com/analog tools.
5.3 Application Notes
The following Microchip Application Notes are
available on the Microchip web site at www.microchip.
com/appnotesand are recommended as supplemental
reference resources. AN884:Driving Capacitive Loads With Op
Amps, DS00884
AN990:Analog Sensor Conditioning Circuits
An Overview, DS00990
AN1228:Op Amp Precision Design: Random
Noise, DS01228
Some of these application notes, and others, are listed
in the design guide:
Signal Chain Design Guide, DS21825
http://www.microchip.com/mapshttp://www.microchip.com/mapshttp://www.microchip.com/mapshttp://www.microchip.com/mapshttp://www.micro%20chip.com/analog%20toolshttp://www.micro%20chip.com/analog%20toolshttp://www.micro%20chip.com/analog%20toolshttp://www.micro%20chip.com/analog%20toolshttp://www.micro%20chip.com/analog%20toolshttp://www.micro%20chip.com/analog%20toolshttp://www.microchip.%20com/appnoteshttp://www.microchip.%20com/appnoteshttp://www.microchip.%20com/appnoteshttp://www.microchip.%20com/appnoteshttp://www.micro%20chip.com/analog%20toolshttp://www.micro%20chip.com/analog%20toolshttp://www.microchip.com/mapshttp://www.microchip.com/maps -
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MCP6N11
6.0 PACKAGING INFORMATION
6.1 Package Marking Information
Legend: XX...X Customer-specific information
Y Year code (last digit of calendar year)
YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week 01)
NNN Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
* This package is Pb-free. The Pb-free JEDEC designator ( )can be found on the outer packaging for this package.
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
3e
3e
8-Lead SOIC (150 mil) (MCP6N11)
8-Lead TDFN (23) (MCP6N11) Example
Device Code
MCP6N11-001 AAQ
MCP6N11-002 AAR
MCP6N11-005 AAS
MCP6N11-010 AAT
MCP6N11-100 AAU
Note: Applies to 8-Lead 2x3 TDFN
Note: The example is for a
MCP6N11-001 part.
NNN
6N11001E
SN^^ 1121
256
3e
AAQ
121
25
Example
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Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
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Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
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Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
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Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
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MCP6N11
APPENDIX A: REVISION HISTORY
Revision A (October 2011)
Original Release of this Document.
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MCP6N11
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
Device: MCP6N11 Single Instrumentation Amplifier MCP6N11T Single Instrumentation Amplifier
(Tape and Reel)
Gain Option: 001 = Minimum gain of 1 V/V002 = Minimum gain of 2 V/V005 = Minimum gain of 5 V/V010 = Minimum gain of 10 V/V100 = Minimum gain of 100 V/V
Temperature Range: E = -40C to +125C
Package: MNY = 23 TDFN, 8-lead *SN = Plastic SOIC (150mil Body), 8-lead
* Y = nickel palladium gold manufacturing designator. Onlyavailable on the TDFN package.
Examples:
a) MCP6N11T-001E/MNY: Tape and Reel,Minimum gain = 1,Extended temperature,
8LD 23 TDFN.
b) MCP6N11-002E/SN: Minimum gain = 2,Extended temperature,8LD SOIC.
PART NO. X /XX
PackageGainOption
Device
X
TemperatureRange
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Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyers risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
KEELOQ, KEELOQlogo, MPLAB, PIC, PICmicro, PICSTART,
PIC32logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, chipKIT,
chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net,
dsPICworks, dsSPEAK, ECAN, ECONOMONITOR,FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP,
Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB,
MPLINK, mTouch, Omniscient Code Generation, PICC,
PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE,
rfLAB, Select Mode, Total Endurance, TSHARC,
UniWinDriver, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
2011, Microchip Technology Incorporated, Pr inted in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-61341-685-3
Note the following details of the code protection feature on Microchip devices:
Microchip products meet the specification contained in their particular Microchip Data Sheet.
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchips DataSheets. Most likely, the person doing so is engaged in theft of intellectual property.
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as unbreakable.
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchips code protect ion feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2009 certification for its worldwideheadquarters, design and wafer fabrication facilities in Chandler andTempe, Arizona; Gresham, Oregon and design centers in Californiaand India. The Companys quality system processes and proceduresare for its PICMCUs and dsPICDSCs, KEELOQcode hoppingdevices, Serial EEPROMs, microperipherals, nonvolatile mem