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EVAL-AD5791SDZ User Guide UG-1152
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluation Board for the AD5791 1 ppm 20-Bit, ±1 LSB INL, Voltage Output DAC
with Single and Dual Supply
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. A | Page 1 of 26
FEATURES Full-featured evaluation board for the AD5791 with the
ADP5070 power solution Power Solution generated from single 3.3 V supply. PC control in conjunction with Analog Devices, Inc.,
EVAL-SDP-CB1Z SDP PC software for control
EVALUATION KIT CONTENTS EVAL-AD5791SDZ evaluation board EV-ADR445-REFZ reference board AD5791 evaluation software
GENERAL DESCRIPTION This user guide supports the EVAL-AD5791SDZ evaluation board, Revision B. UG-185 supports previous revisions of the evaluation board.
The EVAL-AD5791SDZ is a full-featured evaluation board, designed for the easy evaluation of all features of the AD5791 voltage output, 20-bit digital-to-analog converter (DAC). The AD5791 pins are accessible at on-board connectors for external connection. The evaluation board can be controlled by two means: via the on-board connector (J12) or via the system demonstration platform (SDP) connector (J14).
The evaluation board also integrates a power solution utilizing the ADP5070 switching regulator and linear regulators (ADP7118 and ADP7182) to generate a bipolar supply of up to −15 V and +15 V from a +3.3 V single supply. Alternatively, the DAC can be supplied with linear power supplies via the on-board connectors (J11 and J13).
A daughter board connected to the top right of the EVAL-AD5791SDZ includes a voltage reference to externally apply to the DAC.
The EVAL-SDP-CB1Z SDP board allows the EVAL-AD5791SDZ evaluation board to be controlled through the USB port of a Windows®-based PC featuring Windows XP or later when using the AD5791 evaluation software.
The AD5791 is a high precision, 20-bit DAC, designed to meet the requirements of precision control applications. The output range of the AD5791 is configured by two reference voltage inputs. The device is specified to operate with a dual power supply of up to 33 V.
Complete specifications for the AD5791 are available in the AD5791 data sheet available from Analog Devices, which must be consulted in conjunction with this user guide when using the evaluation board.
EVALUATION BOARD PHOTOGRAPH
Figure 1.
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TABLE OF CONTENTS Features .............................................................................................. 1 Evaluation Kit Contents ................................................................... 1 General Description ......................................................................... 1 Evaluation Board Photograph ......................................................... 1 Revision History ............................................................................... 2 Evaluation Board Hardware ............................................................ 3
Power Supplies and Default Link Options ................................ 3 Power Solution (ADP5070)—Single-Supply Option ............... 4 Bench Power Supply—Dual Supply Option ............................. 4 Voltage Reference Daughter Board ............................................ 4 On-Board Connectors ................................................................. 7
Evaluation Board Software .............................................................. 8
Software Installation .....................................................................8 Software Operation .......................................................................8 Main Window ................................................................................9
Evaluation Board Schematics and Artwork ................................ 11 AD5791 Carrier Board .............................................................. 11 ADR445 Reference Voltage Daughter Board ......................... 18 LTZ1000 Reference Voltage Daughter Board ......................... 20 LTC6655 Reference Voltage Daughter Board ......................... 22
Ordering Information .................................................................... 24 Bill of Materials ........................................................................... 24
REVISION HISTORY 6/2018—Rev. 0 to Rev. A Added Figure 5; Renumbered Sequentially .................................. 5 Changes to LTZ1000 and LTC6655 Reference Boards Section ....... 5 Added LTC6655 Reference Voltage Daughter Board Section and Figure 27 .......................................................................................... 22 Added Figure 28 to Figure 31 ....................................................... 23 Added Table 9 .................................................................................. 26 1/2018—Revision 0: Initial Version
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 3 of 26
EVALUATION BOARD HARDWARE POWER SUPPLIES AND DEFAULT LINK OPTIONS The EVAL-AD5791SDZ evaluation board can be powered using the on-board ADP5070 from a single voltage. The voltage sources available are an external single supply via the J11 connector and a supply sourced from the SDP controller board (EVAL-SDP-CB1Z).
Alternatively, the J13 connector can provide power to the board, instead of the ADP5070, and J13 is intended for use with well-regulated bench supplies. See Figure 2 for a functional block diagram.
With any of the possible options, set the link options on the evaluation board for the required operating setup first, before supplying the evaluation board.
Each supply is decoupled to the relevant ground plane with 10 µF and 0.1 µF capacitors. Each device supply pin is again decoupled with a 10 µF and 0.1 µF capacitor pair to the relevant ground plane.
The analog and digital planes are connected at one location close to the DAC. To avoid ground loop problems, do not connect AGND and DGND elsewhere in the system.
Table 1. Quick Start Jumper Configuration for ADP5070 and Bench Supply
Link No. ADP5070 with LDOs ADP5070 Bench Supply
LK2 Inserted Inserted Removed LK5 Removed Inserted Inserted LK6 Removed Inserted Not
applicable LK7 Removed Inserted Not
applicable LK8 B A A LK9 B B A LK10 B B A
Figure 2. Powering the EVAL-AD5791SDZ Evaluation Board
LK1
A
ADP5070
J13
VDDAGND
VSS
AD5791VDD
VSS
VCC
VREFVCC
DGND
LK9AB
A
B
ADP7118
LK8A
B
ADP7182
ADP7118
LK2LK7
LK6
LK5
IOVCC
LK10
J12 PIN10
J11
VOLTAGE REFERENCEDAUGHTER BOARD
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POWER SOLUTION (ADP5070)—SINGLE-SUPPLY OPTION The EVAL-AD5791SDZ board is populated with an ADP5070 switching regulator. This regulator is preceded by voltage regulators (ADP7118 and ADP7182) that can be bypassed if required. The supplies generated from the ADP5070 alone or with the addition of the voltage regulators are −15 V and +15 V from a +3.3 V single supply. Link LK6 and Link LK7 must be inserted when the voltage regulators are bypassed.
The circuit was designed using the ADIsimPower toolset, which selects the components, generates the schematic and bill of materials, and displays the performance specifications. Visit the ADP5070 product page to download the design tools.
The ADP5070 requires a minimum voltage supply of 3.3 V for correct operation. Following the jumper configuration in Table 1 for the ADP5070 alone or the ADP5070 with low dropout regulators (LDOs) options, the evaluation board is supplied via the on-board J11 connector with an external 3.3 V single supply.
The J11 connector can be supplied with a range of 3.3 V to 5.5 V when Link LK5 is inserted, or with a range of 3.3 V to 18 V when Link LK5 is removed.
Link LK1 must be inserted to Position A at all times. Refer to Table 3 for full link options.
BENCH POWER SUPPLY—DUAL SUPPLY OPTION The evaluation board can be powered using a bench supply to allow all output voltage ranges of the AD5791. A headroom and footroom of at least 2.5 V is required on the dual supply. It is important that the voltage across the negative analog supply (VSS) and positive analog supply (VDD) does not exceed the absolute maximum rating of 34 V. Otherwise, device reliability can be affected.
Following the jumper configuration in Table 1 for the bench supply configuration, supply the evaluation board with a dual supply of VSS = −15 V and VDD = +15 V via the J13 connector. The AD5791 also requires users to apply a 3.3 V single supply to the VCC and IOVCC pins that can be sourced via the J11 connector or the on-board J12 connector. Select the position of Link LK8 depending on the preferred source to supply the VCC pin and the IOVCC pin. Select the position of Link LK1 to Position A at all times. Refer to Table 3 for full link options.
VOLTAGE REFERENCE DAUGHTER BOARD The daughter board inserted into Connector J1, Connector J4, and Connector J9 (available at the top right corner of the EVAL-AD5791SDZ evaluation board) includes a voltage reference. The voltage supplied by the voltage reference is gained up and inverted to provide the positive and negative reference voltages required by the AD5791, which are routed to the EVAL-AD5791SDZ board via the J4 connector.
ADR445 Reference Board
The EVAL-AD5791SDZ evaluation kit provides the EV-ADR445- REFZ reference board to complete the hardware required to evaluate the AD5791.
The ADR445 is a 5 V low noise reference with 3 ppm/°C maximum temperature drift and 2.25 µV p-p noise specifications across the operating temperature range. Figure 3 shows the typical integral nonlinearity (INL) performance.
Figure 3. AD5791 with ADR445 INL Performance
Link JP1 selects the source of the reference voltage between the ADR445 and an external 5 V reference voltage applied at the VR_EXT connector. Refer to Table 2 for the link details.
Table 2. JP1 Link Reference Voltage Selection JP1 Link Position Reference Voltage Selection A ADR445 B 5 V external reference voltage applied at
VR_EXT connector
–2.5
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
0 200000 400000 600000 800000 1000000DAC CODE
INL
ERR
OR
(LSB
)
ADR445 REFERENCEEXTERNAL SUPPLY ON J13VDD = +15VVSS = –15V3458A DMM, NPLC = 10STEP SIZE = 1024TA = 25°C
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LTZ1000 and LTC6655 Reference Boards
The EV-LTZ1000-REFZ and EV-LT6655-REFZ reference boards, including the LTZ1000 and LTC6655 voltage references respectively, are also available to evaluate the AD5791.
The LTZ1000 reference board components maintain the 1 ppm accuracy of the AD5791. The LTZ1000 is a 7.2 V ultraprecision reference specified with 0.05 ppm/°C temperature drift and ultralow 1.2 µV p-p noise. The voltage reference is used in conjunction with low drift amplifiers (ADA4077-2) and a low drift, thermally matched resistor for the scaling and gain circuits. Place a cover over the reference board to reduce thermal errors due to air currents flowing over the reference board. Figure 4 shows the typical INL performance using the LTZ1000 reference.
The LTC6655 reference board offers improved noise and temperature drift performance over the ADR445 solution. The LTC6655 is a low noise, low drift precision reference with 2 ppm/°C temperature drift and 1.25 µV p-p noise. Figure 5 shows the typical INL performance of the AD5791 using the LTC6655 reference.
A minimum external unipolar supply of 3.3 V is required to supply the EVAL-AD5791SDZ with the EV-LTZ1000-REFZ board or with the EV-LT6655-REFZ board combination. Alternatively, external dual supplies can supply the motherboard and daughter board.
Figure 4. AD5791 with LTZ1000 INL Performance
Figure 5. AD5791 with LTC6655 INL Performance
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
0.5
0 200000 400000 600000 800000 1000000DAC CODE
INL
ERR
OR
(LSB
)
LTZ1000 REFERENCEEXTERNAL SUPPLY ON J13V = +15VV = –15V3458A DMM, NPLC = 10STEP SIZE = 1024T = 25°C
1601
0-10
4
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
0 200000 400000 600000 800000 1000000
INL
ERR
OR
(LSB
)
CODE 1601
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UG-1152 EVAL-AD5791SDZ User Guide
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Table 3. Link Options Link No. Description LK1 This link selects the source of the digital power supply from Connector J11. Position A must be selected at all times. Position A selects the source from the SDP board. Position B selects the source from Connector J12. LK2 This link selects whether or not the power solution on the board is used to supply the AD5791. When this link is inserted, the ADP5070 dc-to-dc switch is used to supply the AD5791 in single supply. When this link is removed, the ADP5070 dc-to-dc switch is bypassed. LK3 This link selects the state of the LDAC pin.
When this link is inserted, LDAC is at logic low.
When this link is removed, LDAC is at logic high.
LK4 This link selects the state of the RESET pin.
When this link is inserted, RESET is at logic low.
When this link is removed, RESET is at logic high.
LK5 This link selects the voltage source for the digital supply VCC pin. When this link is inserted, the digital supply is sourced from an external 3.3 V single supply (Connector J11) with Link LK1
on position A. Note that the J11 connector can be supplied with a range of 3.3 V to 5.5 V when Link LK5 is inserted. When this link is removed, the digital supply is sourced from the adjusted voltage generated by the ADP5070 and regulated by
the ADP7118. Note that the J11 connector can be supplied with a range of 3.3 V to 18 V when Link LK5 is removed. LK6 This link selects whether the ADP7118 regulator is included in the VDD source circuit. When this link is inserted, the ADP7118 regulator is bypassed. When this link is removed, the ADP7118 regulator adjusts the positive analog supply generated by the ADP5070 power solution. LK7 This link selects whether the ADP7182 regulator is included in the VSS source circuit. When this link is inserted, the ADP7182 regulator is bypassed. When this link is removed, the ADP7182 regulator adjusts the negative analog supply generated by the ADP5070 power
solution. LK8 This link selects the voltage source for the IOVCC pin. Position A selects an externally applied voltage at Pin 10 of Connector J12. Position B connects IOVCC to VCC. LK9 This link selects the voltage source for the negative analog supply VSS. Position A selects the source from the voltage externally applied at VSS of Connector J13. Position B selects the source from the negative voltage generated by the ADP5070 and adjusted by an ADP7182 regulator,
depending on the position of Link LK7. LK10 This link selects the voltage source for the positive analog supply VDD. Position A selects the source from the voltage externally applied at VDD of Connector J13. Position B selects the source from the positive voltage generated by the ADP5070 and adjusted by an ADP7118 regulator,
depending on the position of Link LK6. LK11 This link selects the state of the CLR pin.
When this link is inserted, CLR is at logic low.
When this link is removed, CLR is at logic high.
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 7 of 26
ON-BOARD CONNECTORS Table 4 shows the connectors on the EVAL-AD5791SDZ.
Table 4. On-Board Connectors Connector Function J1 to J9 Voltage reference daughter board connectors J11 Digital power supply connector J12 Digital interface pin header connector J13 Analog power supply connector J14 SDP board connector VO DAC output connector VO_BUF Buffered DAC output connector VR_EXT 5 V voltage reference input connector
Connector J12 Pin Descriptions
Figure 6 and Table 5 show the Connector J12 pins.
Figure 6. Connector J12 Pin Configuration
Table 5. Connector J12 Pin Descriptions Pin No. Description 1 CLR
2 LDAC
3 RESET
4 SCLK 5 SDIN 6 SDO 7 SYNC
8 DGND 9 DGND 10 IOVCC
2 4 6 8 10
1 3 5 7 9
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EVALUATION BOARD SOFTWARE SOFTWARE INSTALLATION The AD5791 evaluation kit includes self installing software on a CD. The software is compatible with Windows XP or later Windows-based PCs. If the setup file does not run automatically, you can run setup.exe from the CD.
Install the evaluation software before connecting the evaluation board and SDP board to the USB port of the PC to ensure that the evaluation system is correctly recognized when connected to the PC.
After installation from the CD is complete, power up the AD5791 evaluation board as described in the Power Supplies and Default Link Options section. Connect the SDP board to the AD5791 evaluation board and then to the USB port of your PC using the supplied cable.
When the evaluation system is detected, proceed through any dialog boxes that appear. This completes the installation.
SOFTWARE OPERATION To launch the software, complete the following steps:
1. From the Start menu, select Analog Devices – AD5791 > AD5791 Evaluation Software. The main window of the software displays (see Figure 8).
2. If the evaluation system is not connected to the USB port when the software is launched, a connectivity error displays (see Figure 7). Connect the evaluation board to the USB port of the PC, wait a few seconds, click Rescan, and follow the instructions.
Figure 7. Connectivity Error Alert
Figure 8. Main Window
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EVAL-AD5791SDZ User Guide UG-1152
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MAIN WINDOW The main window is divided into three tabs: Configure, Program Voltage, and Measure DAC Output.
Configure
The Configure tab allows access to the control register, clear code register, software control register, and DAC register, and also allows control of the RESET, CLR, and LDAC pins, as shown in Figure 8.
Program Voltage
The Program Voltage tab programs the DAC register with a value calculated from the three entered values: the positive voltage reference (VREFP), the negative voltage reference (VREFN), and the desired output voltage input to the Program Voltage field, as shown in Figure 9.
Figure 9. Program Output Voltage Window
Measure DAC Output
The Measure DAC Output section allows the PC to control an Agilent 3458A multimeter to measure and log the DAC output voltage.
The multimeter is controlled over a general-purpose interface bus (GPIB). Once connected to the PC, the multimeter must first be configured via its front panel before taking a measure-ment. Figure 11 shows the measurement options. The software runs through a sequence of steps, programming the DAC register and measuring the DAC output voltage. The sequence begins with the software programming the DAC with the Start Code value, incrementing the programmed value at each step by the Code Step value, and finishing when the programmed value reaches the Stop Code value. A delay between measurements can be inserted, if required. The GPIB address of the multimeter must be specified.
To begin the measurement, click START. Halt the measurement at any time by clicking STOP. When the measurement is completed, a dialog box appears to allow the data to be saved as a spreadsheet file with three columns of data. The first column is the DAC code, the second column is the DAC voltage in volts, and the third column is the INL error in least significant bits (LSBs), as shown in Figure 10. A graph of both DAC output voltage vs. DAC code and INL error vs. DAC code displays on screen. In the measurement example shown in Figure 11, measurements are taken in 1024 code steps beginning at Code 0 and finishing at Code 1,047,552, in total 1023 measurements. With the number of power line cycles (NPLC) setting on the multimeter set to 1, the measurement takes ~75 sec to complete. To complete an all codes measurement, requiring 1,048,576 measurement points, the measurement takes ~21 hours to complete.
Figure 10. Saved Data Format
If an Agilent 3458A multimeter is not connected to the PC, the software steps through the codes without taking any measurements.
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Figure 11. Measure DAC Output Window
16
010-
007
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 11 of 26
EVALUATION BOARD SCHEMATICS AND ARTWORK AD5791 CARRIER BOARD
Figure 12. Schematic of the Main AD5791 Circuitry
16010-010
VSS
AG
ND
VD
D
VDD
TO
REF
EREN
CE
BOA
RD
S
VSS
TO
RE
FER
EN
CE
BO
ARD
S
CO
NN
EC
T A
GN
D T
O D
NG
_EA
RTH
WIT
H A
STA
R C
ON
NEC
TIO
N
MIL
L-M
AX
HEA
DE
R (M
) CO
NN
EC
TOR
.ALI
GN
WIT
H V
RE
F C
ON
NEC
TOR
ON
REF
ERE
NC
E B
OA
RD
S
NC
PIN
S AR
E R
ESER
VED
FO
R F
UTU
RE
US
E
MIL
L-M
AX S
OC
KE
T (F
)
VCC
10
MIL
L-M
AX S
OC
KET
(F)
MIL
L-M
AX
SOC
KET
(F)
DG
ND
AG
ND
TO
REF
ER
ENC
E BO
ARD
S
MIL
L-M
AX
SOC
KET
(F)
1
NC
PIN
S A
RE
RE
SER
VED
FO
R F
UTU
RE
USE
MIL
L-M
AX
SO
CKE
T (F
)
NC
PIN
S A
RE
RE
SER
VED
FO
R F
UTU
RE
USE
MIL
L-M
AX S
OC
KET
(F)
AGN
D
0.1UF
M20
-999
0345
DN
I
10UF
600O
HM
M20
-999
0345
M20
-999
0345
0
AG
ND
600O
HM
DN
I
DN
I
600O
HM
0.1uF
10uF
0.1uF
10uF
AG
ND
AG
ND
AG
ND
AGN
D
AGND
DN
I DN
I
DN
I
AGN
D
DN
I
AG
ND
GN
D_E
AR
TH
M20
-999
0345
600O
HM
1727
023
LK1
J13
LK8
LK10
C5C3
LK9
J9
J8J7
J3J2
J1
J5 J6
TP10
R0
LK5
LK2
LK7
LK6
J4
VO
_BU
F
VO
TP9
C1
C6C4
L2L1
L4
J11
C2
L3
LK4
LK3
LK11
J12
IOV
CC
+3.3
V
VDD
VSS
VR
EFN
VSS
_LD
O
VSS
VDD
IOVC
C
LDAC_N
SCLKSDIN
CLR_N
VC
C
VR
EFP
RESET_N
SYNC_N
VO
UT2
VSS
_LD
O
VD
D_L
DO
VO
UT1
VO
UT2
+3.3
V
VO
UT1
SDO
VD
D_L
DO
VCC
32
1
321
3 21
32
1
NPNP
32
1
321
321321
321321
321
321 321
1
21
21
21
21
321
1
54
32
1
1
NP2
1
21
21
212
1
21
21
21
10987654321
IN
BA
BA
BABA
SD
P_B
LOC
K
+3.3
V
SC
LKSD
INSD
O
CLR
_NLD
AC
_NR
ESET
_N
SYN
C_N
AD
5791
_BLO
CK
IOVCC_DACVCC_DAC
SYN
C_N
SD
O
CLR
_NLD
AC
_N
SD
INS
CLK
RES
ET_N
VOU
T_BU
FVO
UT
REF
N
REF
P
VSS_DACVDD_DAC
AD57
91_P
OW
ER
SEC
TIO
N+5
V
VO
UT2
_FIL
TER
VO
UT1
_FIL
TER
AVC
CAV
DD
_LD
OA
VSS_
LDO
VOUT1VOUT2
54
32
UG-1152 EVAL-AD5791SDZ User Guide
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Figure 13. Schematic of the ADP5070 DC-to-DC Switch Circuitry
1601
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1
49.9K
10
4.7
30.1
K
30.1K
DNI0
DNI0
0DNI
00
0DNI
AGND
AGND
0V
2.2uH
0V
0V
AGND
0V0V
AGND
AGND
10uF
15uH
1.5uH
6.8u
H
DFLS130-7
BAT54LPS
54.9K
1uF
0V
4.7u
F
AGND
AGND 3.57K
63.4K
0V
4.7u
F
0.022uF
AGND
2.2u
F
ADP5070ACPZ-R7
2.2u
F
0.082uF
22PF
1uF
AGND
27PF
2.8K
18.7
K22K
C9
C8
R3 8 R41
R3 7 R40R39
R1
R26 C39
C38R25R42
R2
1R
20
C42
R29
C41
L7
L9
C37
R22
C36
D2
L6
L8
C34
C35
C40R27
R28
R24
R23
U5
D3 VOUT2
VREG
+5V
VOUT1A C
14
122
18
20
8
4
3
16 17 15
19
PA
D
1
11
5
9
7
10
6
13
A C
OUT
OUT
PA
D
SW2
PV
IN2
PV
INS
YS
PV
IN1
VREG
AG
ND
VREF
FB2
COMP2EN2
SS
EN1
COMP1
FB1
SLEW
SEQ
SYNC/FREQ
INBK
SW1
PG
ND
EVAL-AD5791SDZ User Guide UG-1152
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Figure 14. Schematic of the LDOs (ADP7118 and ADP7182) from the Power Solution Circuitry
105K
105K
10
100.
01uF
DN
IADP7118ARDZ
2.2u
F
AGND
AGND
AGND
2.2U
F
AGND
AGND
AGND
AGND
ADP7118ARDZ-3.3
AGND
AGNDAGND
1uF
2.2u
F
2.2U
F
AGND
1uF
AGND
1
10K
10K
ADP7182ACPZN
R35
R36
R33
R32C7
C47
C45
R34
R31
R30
C48
C46
C44
C43
U8
U6
U7
VOUT2_FILTER
AVDD_LDO
AVCC
+5V
VOUT2
VOUT1_FILTER
AVSS_LDO
VOUT1
16
45
PA
D
32
21
87
63
4 DAP
5
21
87
63
4 DAP
5
EPADVIN
GND NC
ENADJ
VOUT
VOUTVIN
PAD
VIN
SS
EN
GND
SENSE/ADJ
VOUT
VOUTVIN
PAD
VIN
SS
EN
GND
SENSE/ADJ
VOUT
IN
IN
IN
IN
INOUT
OUT
OUT
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Figure 15. Schematic of the AD5791 Circuitry
U2 U3 U3 U2
0
10U
F
10K
AD8676BRMZ
0.1U
F
AGND
DN
I
AGND
AD5791BRUZ_PRELIM
0.1U
F
0.1U
F
220P
F
10K
AGND
10PF
DN
I
AGND
0.1U
F
0.1U
F
AGND
AGND
AGND
0.1U
F0.
1UF
0.1U
F
10U
F10
UF
10U
F10
UF
10U
F
0
0
0
0
0.1U
F
10K
10K
DN
I 220P
F
0
0AD8675ARZ
10U
F
0.1U
F
10U
F
AGND
AD8676BRMZ
AD8676BRMZ
U2
U2
C29
C26
C24
C32
C30
C21
C18
C16
C14
R19
C25
C31
C33
C27
C28
U2
R18
R17
R16
R15
R14
R13
R9
R10
R11
R12
C20
C19
C17
C22
U1
C15
U3
C23
C13
RESET_N_TP
CLR_N_TP
LDAC_N_TP
SDIN_TP
SCLK_TP
SYNC_N_TP
SDOSDIN
SYNC_N
VDD_DAC
VSS_DAC
REFP
VOUT
VOUT_BUF
REFN
VDD_DAC
VSS_DAC
RESET_N
CLR_N
LDAC_N
SCLK
IOVCC_DACIOVCC_DAC
SDO_TP
VDD_DAC
VSS_DAC
VCC_DAC
13
2
75
6
NP
NP
NP
NP
NP
NP N
P
NP
4
8
18
34
1716
2
5 9
14
111213 20
6
8
10
1
15
7
19
4
76
812
3
OUT
OUT
V-V+
IN
IN
IN
IN
IN
IN
IN
IN
RFB
AG
ND
V SS
VREFNS
VREFNF
DG
ND
SYNCSCLKSDIN SDO
IOV
CC
V CC
LDACCLRRESET
V DD
VREFPF
VREFPS
VOUT
INV
N2N1
V+
V-OUT
IN
IN
IN
IN
IN
IN
IN
IN
IN
OUT
IN
OUT
IN
1601
0-01
3
IN
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 15 of 26
Figure 16. Schematic of the SDP Board Connector
AGND
FX8-120S-SV(21)
AGND
AGND
24LC64-I/SN
U4
J14
SCLK
+3.3V
SYNC_N
LDAC_N
TP_10
TP_11TP_1TP_2TP_3
CLR_N
SDIN
SDO
+3.3V
RESET_N
TP_12
TP_4 7
4
8
56321
65
116
1
5
6259
72497348
87
89
3029 92
9032
88
3191
3837
85
39
8483
3433
82
64
35
41 8042 79
57
60
1002199
26 9527
7 1148 1139 112
10 111110
1213 10814 10715 10616 105
18 10319 10220 101
22
94
24 9725 96
120119
70
68676655
5453
5150
2
7447
764577447843
118117
115
109
104
98
93
86
81
75
69
6358
52
46
40
36
28
23
17
11
6
43
56
71
61
IN
VSS
VCC
WP
A2A1A0
SCLSDA
OUT OUTOUTOUT
OUT
OUTOUT
IN
ININ
IN
IN
IN
IN
IN
SPI_SEL_A
CLKOUT
NCNC
GNDGND
VIO(+3.3V)GND
PAR_D22PAR_D20PAR_D18PAR_D16PAR_D15
GNDPAR_D12PAR_D10
PAR_D8PAR_D6
GNDPAR_D4PAR_D2PAR_D0
PAR_WR_NPAR_INT
GNDPAR_A2PAR_A0
PAR_FS2PAR_CLK
GNDSPORT_RSCLK
SPORT_DR0SPORT_RFSSPORT_TFSSPORT_DT0
SPORT_TSCLKGND
SPI_MOSISPI_MISO
SPI_CLKGND
SDA_0SCL_0GPIO1GPIO3GPIO5
GNDGPIO7
TMR_BTMR_D
NCGND
NCNCNC
WAKE_NSLEEP_N
GNDUART_TXBMODE1RESET_IN_N
UART_RXGNDRESET_OUT_NEEPROM_A0NCNCNCGNDNCNCTMR_CTMR_AGPIO6GNDGPIO4GPIO2GPIO0SCL_1SDA_1GNDSPI_SEL1/SPI_SS_NSPI_SEL_C_NSPI_SEL_B_NGNDSERIAL_INTSPI_D3SPI_D2SPORT_DT1SPORT_DR1SPORT_TDV1SPORT_TDV0GNDPAR_FS1PAR_FS3PAR_A1PAR_A3GNDPAR_CS_NPAR_RD_NPAR_D1PAR_D3PAR_D5GNDPAR_D7PAR_D9PAR_D11PAR_D13PAR_D14GNDPAR_D17PAR_D19PAR_D21PAR_D23GNDUSB_VBUSGNDGNDNCVIN
1601
0-01
4
UG-1152 EVAL-AD5791SDZ User Guide
Rev. A | Page 16 of 26
Figure 17. Component Placement Schematic
Figure 18. Top Printed Circuit Board (PCB) Layer Schematic
1601
0-01
516
010-
016
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 17 of 26
Figure 19. Bottom PCB Layer Schematic
1601
0-01
7
UG-1152 EVAL-AD5791SDZ User Guide
Rev. A | Page 18 of 26
ADR445 REFERENCE VOLTAGE DAUGHTER BOARD
Figure 20. Schematic of the EV-ADR445-REFZ
AG
ND
10kΩ
DN
I
DNI
0.1µF
DN
ID
NI
AD
A4
077-
2BRZ
10kΩ
DNI
DN
I
DN
I
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
DN
I
10kΩ
0.1
µF
DNI
DN
I
10µF
AD
A40
77-2
BR
Z
10kΩ
AG
ND
AG
ND
DN
I
AG
ND
10kΩ
AG
ND
AG
ND
AD
R4
45B
RZ
DN
I
AG
ND
0.1µF
0.1µF
10kΩ
DN
I
10kΩ
AD
A40
77-2
BR
Z10
kΩ
0.1µ
F
MIL
L-M
AX
HE
AD
ER
(M
) C
ON
NE
CT
OR
MIL
L-M
AX
SO
CK
ET
(F)
MIL
L-M
AX
SO
CK
ET
(F)
VD
D
MIL
L-M
AX
HE
AD
ER
(M
) C
ON
NE
CT
OR
VS
S
MIL
L-M
AX
SO
CK
ET
(F)
MIL
L-M
AX
HE
AD
ER
(M
) C
ON
NE
CT
OR
DN
I
MIL
L-M
AX
HE
AD
ER
(M
) C
ON
NE
CT
OR
M20
-99
9034
5
10kΩ
AG
ND
350-
10-1
03-
00-0
0600
0
MIL
L-M
AX
SO
CK
ET
(M
)
10µF
0.1µF
MIL
L-M
AX
HE
AD
ER
(M
) C
ON
NE
CT
OR
C6
J9
JP1
J2
R7
U2
U2
VR
_E
XT
J7
J1
J6J5
R25
R2
3
R20
R24
C8
C7
R8
R5
R4
R6
C5
C2
C1 C3
J4
R1
R2
2
U2
R21
R2
R3
U1
J8
C4
J3
VR
EF
N
VR
EF
P
VS
S
VD
D
VS
S
VD
D
1
6
4
2
21
3
21 3
248
1
2 3
5
54
2
1
32131
21
321
NP NP
321
2
57
3
31 2
8
7
3
6
3
1
3
NC
NC
TR
IM
VIN
GN
D
TP
TP
VO
UT
V–
V+
BA
16010-018
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 19 of 26
Figure 21. EV-ADR445-REFZ Component Placement Schematic
Figure 22. EV-ADR445-REFZ Top PCB Layer Schematic
Figure 23. EV-ADR445-REFZ Bottom PCB Layer Schematic
160
10-0
20
1601
0-0
211
60
10-0
22
UG-1152 EVAL-AD5791SDZ User Guide
Rev. A | Page 20 of 26
LTZ1000 REFERENCE VOLTAGE DAUGHTER BOARD
Figure 24. Schematic of the EV-LTZ1000-REFZ
SIN
GL
E G
ND
ST
AR
PO
INT
FO
R A
LL
CO
NN
EC
TIO
NS
HE
RE
MIL
L-M
AX
SO
CK
ET
(F
)
25K
10UF
10UF
10UF
10UF
10UF
0.1UF
0.1UF
0.1UF
0.1UF
0.1UF
1M
EG
DN
I
AG
ND
AG
ND
2N
39
04T
F
AD
A4
077
-2B
RZ
10K
/10
K
0.1
UF
1K
0.1
UF
LT
Z1
000
AC
H#P
BF
AG
ND
DN
I
1K
68K
68K
AD
A4
077
-2B
RZ
AD
A4
077
-2B
RZ
0.1
UF
DN
I
AG
ND
0.1UF
1N
270
AD
A40
77-
2B
RZ
AD
A40
77-
2B
RZ
0.1
UF
120
AD
A4
077
-2B
RZ
1.5
K
1N
270
15K
10
K
DN
ID
NI
DN
I
DN
I
DN
I
10K
MIL
L-M
AX
SU
PP
LY
SO
CK
ET
(M
) CO
NN
ET
OR
MIL
L-M
AX
HE
AD
ER
(M)
CO
NN
EC
TO
R
MIL
L-M
AX
HE
AD
ER
(M)
CO
NN
EC
TO
R
MIL
L-M
AX
SO
CK
ET
(F
)M
ILL
-MA
X S
OC
KE
T (
F)
VD
D
MIL
L-M
AX
HE
AD
ER
(M) C
ON
NE
CT
OR
VS
S
MIL
L-M
AX
HE
AD
ER
(M
) C
ON
NE
CT
OR
MIL
L-M
AX
HE
AD
ER
(M
) C
ON
NE
CT
OR
C5C1
Q1
C7C3
C2
4
R4
9
R4
4
C22
R42R41
D2
U5
R20
R40
R39
C23
C13
R8
C12
R4
8
D1
R4
3
R4
5
R46
C2
C4
C6
C8
J4
J5J6
J1
J2 J3
J7J8
C50
C51
U2
U2
U2
U1
U1
U1
J9
VD
D
VS
S
VD
D
VR
EF
N
VR
EF
P1
2
3 1
CA
1 2
3 4
5
67
8
P N
1
2
3
CA
P N
P N
P N
P N
2 3
1 2 3
1 2 3
1 2 3
1 2 3 1 2 3
1 2 3
1 2 35 67
321
8 4
8 4
5 67
3 21
1 2 3
IN
IN IN
V-
V+
V-
V+
16010-023
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 21 of 26
Figure 25. EV-LTZ1000-REFZ Component Placement Schematic
Figure 26. EV-LTZ1000-REFZ Top PCB Layer Schematic
Figure 27. EV-LTZ1000-REFZ Bottom PCB Layer Schematic
1601
0-0
24
16
010
-02
51
601
0-0
26
UG-1152 EVAL-AD5791SDZ User Guide
Rev. A | Page 22 of 26
LTC6655 REFERENCE VOLTAGE DAUGHTER BOARD
Figure 28. Schematic of the EV-LT6655-REFZ
MIL
L-M
AX
SOC
KET
(F)
MIL
L-M
AX
HEA
DER
(M) C
ON
NEC
TOR
MIL
L-M
AX
SOC
KET
(F)
MIL
L-M
AX
HEA
DER
(M) C
ON
NEC
TOR
MIL
L-M
AX
HEA
DER
(M) C
ON
NEC
TOR
MIL
L-M
AX
SOC
KET
(F)
MIL
L-M
AX
HEA
DER
(M) C
ON
NEC
TOR
MIL
L-M
AX
HEA
DER
(M) C
ON
NEC
TOR
MIL
L-M
AX
SOC
KET
(M)
C13
C12
R11
C9
R10
R9
C10
C11
2187 63
PAD
4
5
U1
6721
8 53 4
U3
48U
2
12 3
U2
765
U2
321J9
321J7
321J8
321J3
321J2
321J1
321J6
321J5
R22
R25
R23
R20
R24
R21
C8
C7
R8
R7
R3
R5
R2
R1
R4
R6
C6
C5
NPC2
NPC4
C1 C3
321J4
AG
ND
AD
A40
77-2
BR
Z
VREF
P
DN
I
10K
AG
ND
AG
ND
DNI
0.1u
F
2.2u
F
AG
ND
VREF
N
10K
1uF
1uF
LTC
6655
BH
MS8
-5#P
BF
10K
AD
A40
77-2
BR
Z
DN
I
AG
ND D
NI
10K
DN
I
0.1u
F
DN
I
10K
DN
I
10K
10K
10K
10K
10K
DNI
10K
DNI
AG
ND
10K
AG
ND
10K
10K
AD
A40
77-2
BR
Z
10uF
VDD
10K
0.1u
F AG
ND
100K
10K
AG
ND
VSS
10uF10uF
0.1uF 0.1uF
AG
ND
DN
I
AD
P711
8AR
DZ
DN
I
AG
ND
AG
ND
1000
0PF
AG
ND
VDD
VSS
1uF
AG
ND
DN
I
DN
I
DN
I
350-
10-1
03-0
0-00
6000
VOU
TVI
N
PAD
VIN
SSEN
GN
D
SEN
SE/A
DJ
VOU
TG
ND
V OU
T_F
V OU
T_S
GN
DG
ND
GN
DV I
N
SHD
N
V-V+
16010-128
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 23 of 26
Figure 29. EV-LT6655-REFZ Component Placement Schematic
Figure 30. EV-LT6655-REFZ Top PCB Layer Schematic
Figure 31. EV-LT6655-REFZ Bottom PCB Layer Schematic
1601
0-12
916
010-
130
1601
0-13
1
UG-1152 EVAL-AD5791SDZ User Guide
Rev. A | Page 24 of 26
ORDERING INFORMATION BILL OF MATERIALS
Table 6. AD5791 Carrier Board Reference Designator Part Description Part Number C1, C3, C5, C14, C16, C18, C21, C24,
C26, C30, C32 Capacitors, 3528, 10 μF TAJB106K016RNJ
C2, C4, C6, C13, C15, C17, C22, C25, C27 to C29, C31, C33
Capacitors, 0603, 25 V, 0.1 μF, ±10% C1608X8R1E104K
C34, C40 Capacitors, 0603, 6.3 V, 1 μF, ±20% JMK107B7105MA C35 Capacitor, 0805, 10 V, 10 μF, ±20% TACH106M010XTA C36, C37 Capacitors, 1206, 50 V, 4.7 μF, ±20% C3216X7R1H475M160AC C38 Capacitor, 0603, 16 V, 0.022 μF, ±10% 0603YC223KAT2A C39 Capacitor, 0603, 16 V, 0.082 μF, ±10% CL10B823KO8NNNC C41, C42 Capacitors, 1206, 25 V, 2.2 μF, ±10% C3216X7R1E225K C43, C44 Capacitors, 0603, 10 V, 2.2 μF, ±10% GRM188R71A225KE15D C45, C47 Capacitors, 0603, 16 V, 1 μF, ±10% GRM188R61C105KA93D C46, C48 Capacitors, 0805, 25 V, 2.2 μF, ±10% GRM21BR71E225KA73L C8 Capacitor, 0603, 50 V, 27 pF, ±5% 2238 867 15279 C9 Capacitor, 0603, 50 V, 22 pF, ±5% CC0603JRNP09BN220 D2 Schottky diode DFLS130-7 D3 Schottky diode BAT54LPS J1 to J9 3-position female headers, single-row connectors, 2.54 mm pitch 310-13-103-41-001000 J11 2-position terminal block (3.81 mm pitch) 1727010 J12 10-position male header connector (3.81 mm pitch) M20-9980546 J13 3-pin terminal block (3.81 mm pitch) 1727023 J14 120-way connector, 0.6 mm pitch FX8-120S-SV(21) J4 3-position male header single row connector, 2.54 mm pitch 350-10-103-00-006000 L1, L2, L3 Surface-mount power inductors 7427920415 L6 Surface-mount power inductor LPS6235-153MRB L7 Surface-mount power inductor XFL4020-152MEB L8 Surface-mount power inductor LPS4018-222MRB L9 Surface-mount power inductor LPS6235-682MRB LK1, LK8, LK9, LK10 3-pin single-inline (SIL) header and shorting links M20-9990345 + M7567-05 LK2 to LK7, LK11 2-contact headers, two rows, through hole 69157-102 R0, R13 to R19, R37, R39 Resistors, 0 Ω, 0.0625 W, 1%, 0603 MC0603WG00000T5E-TC R9 to R12 Resistors, 10 kΩ, 0.0625 W, 1%, 0603 MC0063W0603110K R20, R26 Resistors, 30.1 kΩ, 0.1 W, 1%, 0603 ERJ-3EKF3012V R21 Resistor, 18.7 kΩ, 0.1 W, 1%, 0603 ERJ-3EKF1872V R22 Resistor, 4.7 Ω, 0.1 W, 1%, 0603 ERJ-3RQF4R7V R23 Resistor, 63.4 kΩ, 0.0625 W, 1%, 0402 ERJ-2RKF6342X R24 Resistor, 3.57 kΩ, 0.1 W, 1%, 0402 ERJ-2RKF3571X R25 Resistor, 22 kΩ, 0.1 W, 1%, 0603 CRCW060322K0FKEA R27 Resistor, 2.8 kΩ, 0.1 W, 1%, 0402 ERJ-2RKF2801X R28 Resistor, 54.9 kΩ, 0.1 W, 1%, 0402 ERJ-2RKF5492X R29, R31, R34 Resistors, 10 Ω, 0.1 W, 1%, 0603 ERJ-3EKF10R0V R30 Resistor, 1 Ω, 0.0625 W, 5%, 0402 CRCW04021R00JNED R32, R35 Resistors, 105 kΩ, 0.1 W, 1%, 0603 ERJ-3EKF1053V R33, R36 Resistors, 10 kΩ, 0.1 W, 1%, 0603 ERJ-3EKF1002V R42 Resistor, 49.9 kΩ, 0.1 W, 1%, 0603 ERJ-3EKF4992V TP1 to TP7, TP9, TP10 Red test points TP-104-01-02 U1 1 ppm 20-bit, ±1 LSB INL, voltage output DAC AD5791BRUZ U2 Ultraprecision, 36 V, 2.8 nV/√Hz dual rail-to-rail output op amp AD8676BRMZ U3 36 V precision, 2.8 nV/√Hz rail-to-rail output op amp AD8675ARZ
EVAL-AD5791SDZ User Guide UG-1152
Rev. A | Page 25 of 26
Reference Designator Part Description Part Number U4 64 kb I2C serial electrically erasable programmable read only memory
(EEPROM) 24LC64-I/SN
U5 1 A/0.6 A dc to dc switching regulator with independent positive and negative outputs
ADP5070ACPZ-R7
U6 20 V, 200 mA, low noise, complementary metal-oxide-semiconductor (CMOS) LDO linear regulator, 3.3 V fixed output voltage
ADP7118ARDZ-3.3
U7 20 V, 200 mA, low noise, CMOS LDO linear regulator ADP7118ARDZ U8 −200 mA, low noise linear regulator ADP7182ACPZN VO, VO_BUF Straight PCB mount Subminiature Version B (SMB) jacks, 50 Ω 1-1337482-0
Table 7. ADR445 Daughter Board Reference Designator Part Description Part Number C1, C3, C5, C6 Capacitors, 0603, X8R, 25 V, 0.1 μF, ±10% C1608X8R1E104K C2, C4 Capacitors, 3528, 16 V, 10 μF, ±10% TAJB106K016RNJ J1 to J9 3-position male header, single-row connectors, 2.54 mm pitch 350-10-103-00-006000 J4 3-position female header, single-row connector, 2.54 mm pitch 310-13-103-41-001000 JP1 3-position header connector M20-9990345 + M7567-05 R1 to R8 Resistors, 10 kΩ, 0.125 W, 0.01%, 0805 ERA-6AEB103V U1 Ultralow noise 5 V voltage reference ADR445BRZ U2 High precision dual amplifier ADA4077-2BRZ VR_EXT Straight PCB mount SMB jack, 50 Ω 1-1337482-0
Table 8. LTZ1000 Daughter Board Reference Designator Part Description Part Number C1, C3, C5, C7, C13, C22, C23, C24 Capacitors, 0603, 25 V, 0 μF, ±10% C1608X8R1E104K C2, C4, C6, C8, C12 Capacitors, 3528, 16 V, 1 μF, ±10% TAJB106K016RNJ D1, D2 Radio frequency (RF)/pin diodes 1N270 J1 to J9 3-position male header single row connectors, 2.54 mm pitch 350-10-103-00-006000 J4 3-position female header single row connector, 2.54 mm pitch 310-13-103-41-001000 Q1 Single bipolar junction transistor 2N3904TF R20 Resistor, 120 Ω, 0.6 W, 0.01%, through hole Y1453120R000T9 R39, R40 Resistors, 68 kΩ, 0.1 W, 0.1%, 0805 PCF0805-13-68K-B-T1 R41 Resistor, 15 kΩ, 0.6 W, 0.01%, through hole Y145315K0000T9 R42 Resistor, 1 kΩ, 0.6 W, 0.01%, through hole Y14531K00000T9 R43 Resistor, 10 kΩ, 0.6 W, 1%, through hole MRS25000C1002FRP00 R44 Resistor, 1 MΩ, 0.6 W, 1%, through hole MRS25000C1004FCT00 R45 Resistor, 10 kΩ, 0.6 W, 0.005%, through hole Y145310K0000V9L R46 Resistor, 25 kΩ, 0.6 W, 0.01%, through hole Y145325K0000T9 R48 Resistor, 10 kΩ/10 kΩ, 0.1W, 0.01%, 1505 Y1685V0001TT9 R49 Resistor, 1 kΩ, 0.6 W, 1%, through hole MRS25000C1001FRP00 R8 Resistor, 1.5 kΩ, 0.25 W, 1%, through hole CMF-551501FT-1 U1, U2 High precision dual amplifiers ADA4077-2BRZ U5 Ultraprecision reference LTZ1000ACH#PBF
UG-1152 EVAL-AD5791SDZ User Guide
Rev. A | Page 26 of 26
Table 9. LTC6655 Daughter Board Reference Designator Part Description Part Number C1, C3, C11 Capacitors, 0603, 25 V, 0.1 μF, ±10% C1608X8R1E104K080AA C2,C4 Capacitors, 3528, 16 V, 10 μF, ±10% TAJB106K016RNJ C5 Capacitor, 0603, 16 V, 1 μF, ±10% GRM188R61C105KA93D C6 Capacitor, 0805, 10 V, 1 μF, ±10% CL21B106KPQNNNE C9 Capacitor, 0603, 25 V, 1 nF, ±10% C1608X7R1E103K C10 Capacitor, 0805, 25 V, 2.2 μF, ±10% GRM21BR71E225KA73L C12, C13 Capacitors, 0603, 10 V, 1 μF, ±10% GRM188R71A105KA61D J1 to J9 3-position male headers, single-row connectors, 2.54 mm pitch 350-10-103-00-006000 J4 3-position female header, single-row connector, 2.54 mm pitch 310-13-103-41-001000 R1, R2, R3, R4, R5, R6, R7, R8 Resistors, 0805, 10 kΩ, 0.125 W, 0.1% ERA-6AEB103V R10, R11 Resistors, 0603, 10 kΩ, 0.1 W, 1% ERJ-3EKF1002V R9 Resistor, 0603, 100 kΩ, 0.1 W, 1% ERJ-3EKF1003V U1 Low dropout regulator ADP7118ARDZ U2 High precision dual amplifiers ADA4077-2BRZ U3 Low noise, low drift precision reference LTC6655BHMS8-5#PBF
I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors).
ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
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