lt1195 - low power, high speed operational amplifier · the lt ®1195 is a video operational...

1

LT1195

1195fa

FEATURES DESCRIPTIO

U

APPLICATIO SU

TYPICAL APPLICATIO

U

Low Power, High SpeedOperational Amplifier

Gain-Bandwidth Product: 50MHz Unity-Gain Stable Slew Rate: 165V/µs Output Current: ±20mA Low Supply Current: 12mA High Open-Loop Gain: 7.5V/mV Low Cost Single Supply 5V Operation Industry Standard Pinout Output Shutdown

Video Cable Drivers Video Signal Processing Fast Peak Detectors Fast Integrators Video Cable Drivers Pulse Amplifiers

The LT®1195 is a video operational amplifier optimized foroperation on single 5V and ±5V supplies. Unlike manyhigh speed amplifiers, the LT1195 features high open-loop gain, over 75dB, and the ability to drive heavy loadsto a full power bandwidth of 8.5 MHz at 6VP-P. The LT1195has a unity-gain stable bandwidth of 50MHz, a 60° phasemargin and consumes only 12mA of supply current,making it extremely easy to use.

Because the LT1195 is a true operational amplifier, it is anideal choice for wideband signal conditioning, fastintegrators, peak detectors, active filters, and applicationsrequiring speed, accuracy, and low cost.

The LT1195 is a low power version of the popular LT1190,and is available in 8-pin miniDIPs and SO packages withstandard pinouts. The normally unused Pin 5 is used for ashutdown feature that shuts off the output and reducespower dissipation to a mere 15mW.

Fast Pulse Detector Pulse Detector Response

–

+LT1195RS

50ΩVIN

D21N5712

D11N5712

RL10k

–5V

–5V

RB10k

–5V

5V

CL1000pF

CI60pF

RI1k

1195 TA01

3

24

7

6

1195TAO2

OUTPUT

INPUT

, LTC and LT are registered trademarks of Linear Technology Corporation

www.BDTIC.com/Linear

2

LT1195

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LT1195M/CSYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITSVOS Input Offset Voltage J8, N8 Package 3.0 8.0 mV

S8 Package 3.0 10.0 mVIOS Input Offset Current 0.2 1.0 µAIB Input Bias Current ±0.5 ±2.0 µAen Input Noise Voltage fO = 10kHz 70 nV√Hzin Input Noise Current fO = 10kHz 2 pA√HzRIN Input Resistance Differential Mode 230 kΩ

Common Mode 20 MΩ

CIN Input Capacitance AV = 1 2.2 pFInput Voltage Range (Note 4) –2.5 3.5 V

CMRR Common Mode Rejection Ratio VCM = –2.5 to 3.5V 60 85 dBPSRR Power Supply Rejection Ratio VS = ±2.375V to ±8V 60 85 dBAVOL Large-Signal Voltage Gain RL = 1k, VOUT = ±3V 2.0 7.5 V/mV

RL = 150Ω, VOUT = ±3V 0.5 1.5 V/mVVS = ±8V, RL = 1k, VOUT = ±5V 11.0 V/mV

VOUT Output Voltage Swing VS = ±5V, RL = 1k ±3.8 ±4.0 VVS = ±8V, RL = 1k ±6.7 ±7.0 V

SR Slew Rate AV = –1, RL = 1k (Note 5, 10) 110 165 V/µsFPBW Full Power Bandwidth VOUT = 6VP-P (Note 6) 8.75 MHzGBW Gain-Bandwidth Product 50 MHztr1, tf1 Rise Time, Fall Time AV = 50, VOUT = ±1.5V, 20% to 80% (Note 10) 125 170 285 nstr2, tf2 Rise Time, Fall Time AV = 1, VOUT = ±125mV, 10% to 90% 3.4 nstPD Propagation Delay AV = 1, VOUT = ±125mV, 50% to 50% 2.5 ns

Overshoot AV = 1, VOUT = ±125mV 22 %tS Settling Time 3V Step, 0.1% (Note 7) 220 nsDiff AV Differential Gain RL = 150Ω, AV = 2 (Note 8) 1.25 %Diff Ph Differential Phase RL = 150Ω, AV = 2 (Note 8) 0.86 DEGP-P

S8 PART MARKING

Total Supply Voltage (V+ to V–) ............................... 18VDifferential Input Voltage ......................................... ±6VInput Voltage ........................................................... ±VSOutput Short-Circuit Duration (Note 2) .........ContinuousOperating Temperature Range LT1195M (OBSOLETE) ................... –55°C to 125°C LT1195C ................................................ 0°C to 70°CJunction Temperature (Note 3)

Plastic Package (CN8, CS8) ............................ 150°CCeramic Package (CJ8, MJ8) (OBSOLETE) ..... 175°C

Storage Temperature Range ................. –65°C to 150°CLead Temperature (Soldering, 10 sec).................. 300°C

ORDER PARTNUMBER1

2

3

4

8

7

6

5

TOP VIEW

BAL

–IN

+IN

V–

BAL

V+

OUT

S/D

S8 PACKAGE8-LEAD PLASTIC SO

J8 PACKAGE8-LEAD CERDIP

N8 PACKAGE8-LEAD PDIP

TJMAX = 150°C, θJA = 100°C/ W (J8)

VS = ±5V, CL ≤ 10pF, Pin 5 open circuit, unless otherwise noted.

LT1195CN8LT1195CS8

TJMAX = 150°C, θJA = 100°C/ W (N8)TJMAX = 150°C, θJA = 150°C/ W (S8)

Consult LTC Marketing for parts specified with wider operating temperature ranges.

OBSOLETE PACKAGEConsider the N8 or S8 Package for Alternate Source

LT1195MJ8LT1195CJ8

1195ORDER PART

NUMBER

(Note 1)

TA = 25°C

ABSOLUTE AXI U RATI GS

W WW U

PACKAGE/ORDER I FOR ATIOU UW

5V ELECTRICAL CHARACTERISTICS+–


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LT1195

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LT1195M/CSYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VOS Input Offset Voltage J8, N8 Package 3.0 9.0 mVS8 Package 3.0 11.0 mV

IOS Input Offset Current 0.2 1.0 µAIB Input Bias Current ±0.5 ±2.0 µA

Input Voltage Range (Note 4) 2.0 3.5 VCMRR Common Mode Rejection Ratio VCM = 2V to 3.5V 60 85 dBAVOL Large-Signal Voltage Gain RL = 150Ω to Ground, VOUT = 1V to 3V 0.5 3.0 V/mVVOUT Output Voltage Swing RL = 150Ω to Ground VOUT High 3.5 3.8 V

VOUT Low 0.25 0.4 VSR Slew Rate AV = –1, VOUT = 1V to 3V 140 V/µsGBW Gain-Bandwidth Product 45 MHzIS Supply Current 11 15 mA

Shutdown Supply Current Pin 5 at V – 0.8 1.5 mAIS/D Shutdown Pin Current Pin 5 at V – 5 25 µA

LT1195M/CSYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITSIS Supply Current 12 16 mA

Shutdown Supply Current Pin 5 at V – 0.8 1.5 mAIS/D Shutdown Pin Current Pin 5 at V – 5 25 µAtON Turn-On Time Pin 5 from V– to Ground, RL = 1k 160 nstOFF Turn-Off Time Pin 5 from Ground to V–, RL = 1k 700 ns

VS = ±5V, CL ≤ 10pF, Pin 5 open circuit, unless otherwise noted.

VS+ = 5V, VS

–, = OV, VCM = 2.5V, CL ≤ 10pF, Pin 5 open circuit, unless otherwise noted.

LT1195MSYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITSVOS Input Offset Voltage 3.0 15.0 mV∆VOS/∆T Input VOS Drift 17 µV/°CIOS Input Offset Current 0.2 2.0 µAIB Input Bias Current ±0.5 ±2.5 µACMRR Common Mode Rejection Ratio VCM = –2.5V to 3.5V 55 85 dBPSRR Power Supply Rejection Ratio VS = ±2.375V to ±8V 55 80 dBAVOL Large-Signal Voltage Gain RL = 1k, VOUT = ±3V 1.50 5.0 V/mV

RL = 150Ω, VOUT = ±3V 0.25 0.8 V/mVVOUT Output Voltage Swing RL = 1k ±3.7 ±3.9 VIS Supply Current 12 18 mA

Shutdown Supply Current Pin 5 at V –, (Note 9) 0.8 2.5 mAIS/D Shutdown Pin Current Pin 5 at V – 5 25 µA

VS = ±5V, Pin 5 open circuit, unless otherwise noted.

–55°C ≤ TA ≤ 125°C, (Note 11)

TA = 25°C

TA = 25°C



5V ELECTRICAL CHARACTERISTICS


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LT1195CSYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VOS Input Offset Voltage J8, N8 Package 1.0 10.0 mVS8 Package 1.0 15.0 mV

∆VOS/∆T Input VOS Drift 15 µV/°CIOS Input Offset Current 0.2 1.7 µAIB Input Bias Current ±0.5 ±2.5 µA

Input Voltage Range (Note 4) 2.0 3.5 VCMRR Common Mode Rejection Ratio VCM = 2V to 3.5V 60 85 dBVOUT Output Voltage Swing RL = 150Ω to Ground VOUT High 3.5 3.75 V

VOUT Low 0.15 0.4 VIS Supply Current 12 16 mA

Shutdown Supply Current Pin 5 at V– (Note 9) 0.9 2.0 mAIS/D Shutdown Pin Current Pin 5 at V– 5 25 µA

LT1195CSYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITSVOS Input Offset Voltage J8, N8 Package 3.0 10.0 mV

S8 Package 3.0 15.0 mV∆VOS/∆T Input VOS Drift 12 µV/°CIOS Input Offset Current 0.2 1.7 µAIB Input Bias Current ±0.5 ±2.5 µACMRR Common Mode Rejection Ratio VCM = –2.5V to 3.5V 60 85 dBPSRR Power Supply Rejection Ratio VS = ±2.375V to ±5V 60 90 dBAVOL Large-Signal Voltage Gain RL = 1k, VOUT = ±3V 2.0 7.5 V/mV

RL = 150Ω, VOUT = ±3V 0.3 1.5 V/mVVOUT Output Voltage Swing RL = 1k ±3.7 ±3.9 VIS Supply Current 12 17 mA

Shutdown Supply Current Pin 5 at V – (Note 9) 0.9 2.0 mAIS/D Shutdown Pin Current Pin 5 at V – 5 25 µA

0°C ≤ TA ≤ 70°CVS = ±5V, Pin 5 open circuit, unless otherwise noted.

0°C ≤ TA ≤ 70°CVS

+ = 5V, VS– = OV, Pin 5 open circuit, unless otherwise noted.

Note 1: Absolute Maximum Ratings are those values beyond which the lifeof a device may be impaired.Note 2: A heat sink may be required to keep the junction temperaturebelow absolute maximum when the output is shorted continuously.Note 3: TJ is calculated from the ambient temperature TA and powerdissipation PD according to the following formats:

LT1195MJ8/LT1195CJ8: TJ = TA + (PD • 100°C/W)LT1195N: TJ = TA + (PD • 100°C/W)LT1195CS: TJ = TA + (PD • 150°C/W)

Note 4: Exceeding the input common mode range may cause the outputto invert.Note 5: Slew rate is measured between ±1V on the output, with ±3V inputstep.

Note 6: Full power bandwidth is calculated from the slew ratemeasurement: FPBW = SR/2πVP.Note 7: Settling time measurement techniques are shown in “Take theGuesswork Out of Settling Time Measurements,” EDN, September 19, 1985.Note 8: NTSC (3.58MHz). For RL = 1k, Diff AV = 0.3%, Diff Ph = 0.35°.Note 9: See Applications Information section for shutdown at elevatedtemperatures. Do not operate the shutdown above TJ > 125°C.Note 10: AC parameters are 100% tested on the ceramic and plastic DIPpackaged parts (J8 and N8 suffix) and are sample tested on every lot ofthe SO packaged parts (S8 suffix).Note 11: Do not operate at AV < 2 for TA < 0°C.


5V ELECTRICAL CHARACTERISTICS


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LT1195

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TYPICAL PERFOR A CE CHARACTERISTICS

UW

TEMPERATURE (°C)–50

COM

MON

MOD

E RA

NGE

(V)

V+

–0.5

–1.0

–1.5

–2.0

2.0

1.5

1.0

0.5

V–

0 25 75 125

1195 G03

–25 50 100

V+ = 1.8V TO 9V

V+ = –1.8V TO –9V

Common Mode Voltage vsTemperature

Equivalent Input Noise Voltagevs Frequency

Equivalent Input Noise Currentvs Frequency

Output Voltage Swing vsLoad Resistance

COMMON MODE VOLTAGE (V)–5

INPU

T BI

AS C

URRE

NT (

A)

3.0

2.5

2.0

1.5

1.0

0.5

0

–0.5–2 0 2 4

1195 G01

µ

–4 –1 1 3–3 5

VS = ±5V

–55°C

25°C

125°C


INPU

T BI

AS C

URRE

NT (n

A)

100

0

–100

–200

–300

–4000 25 75 125

1195 G02

–25 50 100

+IB

–IB

IOS

VS = ±5V

Input Bias Current vsTemperature

Input Bias Current vsCommon Mode Voltage

FREQUENCY (Hz)

EQUI

VALE

NT IN

PUT

NOIS

E VO

LTAG

E (n

V/√H

z) 600

500

400

300

200

100

010 1k 10k 100k

1195 G04

100

VS = ±5VTA = 25°CRS = 0Ω

FREQUENCY (Hz)

EQUI

VALE

NT IN

PUT

NOIS

E CU

RREN

T (p

A/√H

z) 14

12

10

8

6

4

210 1k 10k 100k

1195 G05

100

VS = ±5VTA = 25°CRS = 100k

±SUPPLY VOLTAGE (V)0

SUPP

LY C

URRE

NT (m

A)

16

14

12

10

82 4 6 10

1195 G06

8

–55°C

125°C

25°C

Supply Current vs Supply Voltage

Shutdown Supply Currentvs Temperature

LOAD RESISTANCE (Ω)10

OUTP

UT V

OLTA

GE S

WIN

G (V

)

5

3

1

–1

–3

–5100 1k

1195 G08

TA = –55°C

TA = 125°CTA = 25°C

VS = ±5V

TA = 125°C

TA = 25°C

TA = –55°C


OPEN

-LOO

P GA

IN (V

/V)

10k

8k

6k

4k

2k

00 25 75 125

1195 G09

–25 50 100

RL = 1kVS = ±5VVO = ±3V

RL = 150Ω

Open-Loop Gain vs Temperature


SHUT

DOW

N SU

PPLY

CUR

RENT

(mA)

6

5

4

3

2

1

00 25 75 125

1195 G07

–25 50 100

VS = ±5VVS/D = –VEE + 0.6V

VS/D = –VEE + 0.2V

VS/D = –VEE + 0.4V

VS/D = –VEE


6

LT1195

1195fa

FREQUENCY (Hz)100k

VOLT

AGE

GAIN

(dB)

1M 10M 100M

1195 G10

100

80

60

40

20

0

–20

PHASE MARGIN (DEG)

100

80

60

40

20

0

–20

VS = ±5VTA = 25°CRL = 1k

PHASE

GAIN


UW

Gain-Bandwidth Product vsSupply Voltage

Common Mode Rejection Ratiovs Frequency

Power Supply Rejection Ratiovs Frequency

Gain and Phase vs Frequency

±SUPPLY VOLTAGE (V)0

GAIN

-BAN

DWID

TH P

RODU

CT (M

Hz)

60

50

40

30

202 4 6 10

1195 G12

8

TA = –55°C

TA = 125°C

TA = 25°C

AV = 20dB

Open-Loop Voltage Gain vsLoad Resistance

LOAD RESISTANCE (Ω)100

OPEN

-LOO

P VO

LTAG

E GA

IN (V

/V)

20k

16k

12k

8k

4k

01k 10k

1195 G11

VS = ±5VVO = ±3VTA = 25°C


100

90

80

70

60

50

40

3025 75

1195 G13

–25 0 50 100 125

UNIT

Y-GA

IN F

REQU

ENCY

(MHz

)

90

80

70

60

50

40

30

20

PHASE MARGIN (DEG)

UNITY-GAINFREQUENCY

VS = ±5VRL = 1k

UNITY-GAINPHASE MARGIN

FREQUENCY (Hz)

OUTP

UT IM

PEDA

NCE

(Ω)

100

10

1

0.1

0.011k 100k 10M

1195 G14

10k 1M 100M

VS = ±5VTA = 25°C

AV = 10

AV = 1

FREQUENCY (Hz)100k

COM

MON

MOD

E RE

JECT

ION

RATI

O (d

B)

1M 10M 100M

1195 G15

60

50

40

30

20

10

0

VS = ±5VTA = 25°CRL = 1k

FREQUENCY (Hz)

POW

ER S

UPPL

Y RE

JECT

ION

RATI

O (d

B)

80

60

40

20

0

–20100M10k 100k 10M

1195 G16

1k 1M

VS = ±5VTA = 25°CVRIPPLE = ±300mV

+PSRR–PSRR


OUTP

UT S

HORT

-CIR

CUIT

CUR

RENT

(mA)

36

35

34

33

32

31

300 25 75 125

1195 G17

–25 50 100

VS = ±5V

Unity-Gain Frequency and PhaseMargin vs Temperature Output Impedance vs Frequency

Output Short-Circuit Currentvs Temperature

SUPPLY VOLTAGE (V)0

OUTP

UT S

ATUR

ATIO

N VO

LTAG

E (V

)

–0.7

–0.8

–0.9

–1.0

–1.1

0.5

0.4

0.3

0.2

0.1V– 2 4 10

1195 G18

6 8

V+

25°C

125°C

–55°C

25°C

125°C

–55°C

RL = RFB±1.8V ≤ VS ≤ ±9V

±Output Swing vs Supply Voltage


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LT1195

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UW

Output Voltage Step vsSettling Time, AV = –1

Output Voltage Step vsSettling Time, AV = 1


SLEW

RAT

E (V

/µs)

250

200

1500 25 75 125

1195 G19

–25 50 100

+SLEW RATE

–SLEW RATE

VS = ±5VRFB = 1kVO = ±2VAV = –1

SETTLING TIME (ns)0

OUTP

UT V

OLTA

GE S

TEP

(V)

400

1195 G20

100 200 300

4

2

0

–2

–4

VS = ±5VTA = 25°CRL = 1k

10mV

10mV

1mV

1mV

SETTLING TIME (ns)0

OUTP

UT V

OLTA

GE S

TEP

(V)

400

1195 G21

100 200 300

4

2

0

–2

–4

VS = ±5VTA = 25°CRL = 1k

10mV

10mV

1mV

1mV

Slew Rate vs Temperature

1195 G25

–

+LT1195

3

28

1

4

7

6

INPUT OFFSET VOLTAGE CAN BE ADJUSTED OVER A±150mV RANGE WITH A 1k to 10k POTENTIOMETER.

5V

Large-Signal Transient Response

AV = –1, RL = 1k

Large-Signal Transient Response

AV = 1, RL = 1k

Overload Recovery

1195 G22

AV = 1, VIN = 11VP-P1195 G24

1195 G23


8

LT1195

1195fa

receiving end (75Ω to ground) to absorb unwanted en-ergy. The best performance can be obtained by doubletermination (75Ω in series with the output of the amplifier,and 75Ω to ground at the other end of the cable). Thistermination is preferred because reflected energy is ab-sorbed at each end of the cable. When using the doubletermination technique it is important to note that the signalis attenuated by a factor of 2, or 6dB. This can be compen-sated for by taking a gain of 2, or 6dB in the amplifier.

Using the Shutdown Feature

The LT1195 has a unique feature that allows the amplifierto be shut down for conserving power, or for multiplexingseveral amplifiers onto a common cable. The amplifier willshutdown by taking Pin 5 to V –. In shutdown, the amplifierdissipates 15mW while maintaining a true high impedanceoutput state of 15k in parallel with the feedback resistors.The amplifiers must be used in a noninverting configura-tion for MUX applications. In inverting configurations theinput signal is fed to the output through the feedbackcomponents. The following scope photos show that withvery high RL, the output is truly high impedance; theoutput slowly decays toward ground. Additionally, whenthe output is loaded with as little as 1k the amplifier shutsoff in 700ns. This shutoff can be under the control of HCCMOS operating between 0V and –5V.

APPLICATIO S I FOR ATIO

WU UU

Power Supply Bypassing

The LT1195 is quite tolerant of power supply bypassing.In some applications a 0.1µF ceramic disc capacitorplaced 0.5 inches from the ampifier is all that is required.In applications requiring good settling time, it is importantto use multiple bypass capacitors. A 0.1µF ceramic disc inparallel with a 4.7µF tantalum is recommended.

Cable Terminations

The LT1195 operational amplifier has been optimized as alow cost video cable driver. The ±20mA guaranteed outputcurrent enables the LT1195 to easily deliver 6VP-P into150Ω, while operating on ±5V supplies.

–

+LT1195

75ΩRFB

–5V

5V

CABLE

1195 AI01

3

2

7

4

6 75Ω

RG

FREQUENCY (Hz)100k

VOLT

AGE

GAIN

(dB)

1M 10M 100M

1195 AI02

8

6

4

2

0

–2

–4

–6

–8

–10

–12

AV = 2RFB = 1kRG = 330Ω

AV = 1RFB = 1kRG = 1k

VS = ±5VTA = 25°C

Cable Driver Voltage Gain vs Frequency

Double-Terminated Cable Driver

Output Shutdown

1MHz SINE WAVE GATED OFF WITH SHUTDOWN PIN

AV = 1, RL = SCOPE PROBE

When driving a cable it is important to terminate the cableto avoid unwanted reflections. This can be done in one oftwo ways: single termination or double termination. Withsingle termination, the cable must be terminated at the

1195 AI03


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LT1195

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Output Shutdown

–

+LT1195

75ΩRFB1k

5V

1195 AI05

3

2

7

4

6 75Ω1000µF

10k

10µF

1k

5V

RG1k

VIN

R22k

100µF

R13k

Video Multiburst at Pin 6 of Amplifier

Detecting Pulses

The front page shows a circuit for detecting very fastpulses. In this open-loop design, the detector diode is D1and a level shifting or compensating diode is D2. A loadresistor RL is connected to –5V, and an identical biasresistor RB is used to bias the compensating diode. Equalvalue resistors ensure that the diode drops are equal. Avery fast pulse will exceed the amplifier slew rate andcause a long overload recovery time. Some amount ofdV/dt limiting on the input can help this overload condi-tion, however too much will delay the response. Alsoshown is the response to a 4VP-P input that is 150ns wide.The maximum output slew rate in the photo is 30V/µs. Thisrate is set by the 30mA current limit driving 1000pF.

Operation on Single 5V Supply

The LT1195 has been optimized for a single 5V supply.This circuit amplifies standard composite video (1VP-Pincluding sync) by 2 and drives a double-terminated 75Ωcable. Resistors R1 and R2 bias the amplifier at 2V,allowing the sync pulses to stay within the common moderange of the amplifier. Large coupling capacitors arerequired to pass the low frequency sidebands of thecomposite signal. A multiburst response and vector plotstandard color burst are shown.

Single 5V Video Amplifier

1195 AI04

1MHz SINE WAVE GATED OFF WITH SHUTDOWN PIN

AV = 1, RL = 1k

Vector Plot of Standard Color Burst

1195 AI06

3V

2V

1V

0V

1195 AI07


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Send Color Video Over Twisted-Pair

With an LT1195 it is possible to send and receive colorcomposite video signals more than 1000 feet on a low costtwisted-pair. A bidirectional “video bus” consists of theLT1195 op amp and the LT1187 video difference amplifier.A pair of LT1195s at TRANSMIT 1, is used to generatedifferential signals to drive the line which is back-termi-nated in its characteristic impedance. The LT1187twisted-pair receiver, converts signals from differential tosingle-ended. Topology of the LT1187 provides for cablecompensation at the amplifier’s feedback node as shown.In this case, 1000 feet of twisted-pair is compensated with1000pF and 50Ω to boost the 3dB bandwidth of thesystem from 750kHz to 4MHz. This bandwidth is adequateto pass a 3.58MHz chrome subcarrier and the 4.5MHzsound subcarrier. Attenuation in the cable can be compen-sated by lowering the gain set resistor RG. At TRANSMIT2, another pair of LT1195s serve the dual function toprovide cable termination via low output impedance andgenerate differential signals for TRANSMIT 2. Cable termi-nation is made up of 15Ω and 33Ω attentuators to reducethe differential input signal to the LT1187. Maximum inputsignal for the LT1187 is 760mVP-P.

1.5MHz Square Wave Input and EqualizedResponse Through 1000 Feet of Twisted-Pair

1.5MHz Square Wave Input and UnequalizedResponse Through 1000 Feet of Twisted-Pair

Multiburst Pattern Passed Through1000 Feet of Twisted-Pair

Vector Plot of Standard Color Burst Through1000 Feet of Twisted-Pair

1195 A109

1195 A110

1195 A111

1195 A108


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+

–VOUT

1195 SS

VBIAS

CM

CFF

V+V+

3

2

1 85BAL BALS/D

6

*

V+7

V–4

* SUBSTRATE DIODE, DO NOT FORWARD BIAS

VBIAS


WU UU

Bidirectional Video Bus

1195 AI12

–

+LT1195

75Ω

33Ω

3

2

6

1k

1k

1k

1k

1000pF

–

+

–

+

+–

S/D

5

6LT1187

15Ω

RFB300Ω

RG300Ω

75Ω

50Ω

2

3

6

33Ω

15Ω

LT1195

RECEIVE 2

33Ω

3

2

6

1k

1k1k

1k

1000pF

S/D

5

6

15Ω

RFB300Ω

RG300Ω

75Ω

50Ω

2

3

6

33Ω

15Ω

–

+

75Ω

–

+

–

+

+–

RECEIVE 1

3

2

1

8

3

2

1

8

TRANSMIT 1 TRANSMIT 2

LT1195

LT1195

LT1187

1000 FTTWISTED-PAIR

SIWPLIFIED SCHEWATIC

W W

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.www.BDTIC.com/Linear

12

LT1195

1195fa

Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417(408) 432-1900 FAX: (408) 434-0507 www.linear.com

LW/TP 1002 1K REV A • PRINTED IN USA

LINEAR TECHNOLOGY CORPORATION 1993

U

PACKAGE DESCRIPTIO

.016 – .050(0.406 – 1.270)

.010 – .020(0.254 – 0.508)

× 45°

0°– 8° TYP.008 – .010

(0.203 – 0.254)

SO8 0502

.053 – .069(1.346 – 1.752)

.014 – .019(0.355 – 0.483)

TYP

.004 – .010(0.101 – 0.254)

.050(1.270)

BSC

1

N

2 3 4

N/2

.150 – .157(3.810 – 3.988)

NOTE 3

8 7 6 5

.189 – .197(4.801 – 5.004)

NOTE 3

.228 – .244(5.791 – 6.197)

.245MIN

N

1 2 3 N/2

.160 ±.005

RECOMMENDED SOLDER PAD LAYOUT

.045 ±.005 .050 BSC

.030 ±.005 TYP

INCHES(MILLIMETERS)

NOTE:1. DIMENSIONS IN

2. DRAWING NOT TO SCALE3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)

S8 Package8-Lead Plastic Small Outline (Narrow .150 Inch)

(Reference LTC DWG # 05-08-1610)

N8 0502

.100(2.54)BSC

.065(1.651)

TYP

.045 – .065(1.143 – 1.651)

.130 ± .005(3.302 ± 0.127)

.020(0.508)

MIN.018 ± .003(0.457 ± 0.076)

.125(3.175)

MIN

1 2 3 4

8 7 6 5

.255 ± .015*(6.477 ± 0.381)

.400*(10.160)

MAX

.009 – .015(0.229 – 0.381)

.300 – .325(7.620 – 8.255)

.325+.035–.015+0.889–0.3818.255( )

NOTE:1. DIMENSIONS ARE

INCHESMILLIMETERS

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)

N8 Package8-Lead PDIP (Narrow .300 Inch)(Reference LTC DWG # 05-08-1510)

J8 0801

.014 – .026(0.360 – 0.660)

.015 – .060(0.381 – 1.524)

.1253.175MIN

.100(2.54)BSC

.300 BSC(7.62 BSC)

.008 – .018(0.203 – 0.457)

0° – 15°

.045 – .065(1.143 – 1.651)

.045 – .068(1.143 – 1.650)

FULL LEADOPTION

.023 – .045(0.584 – 1.143)

HALF LEADOPTION

CORNER LEADS OPTION (4 PLCS)

.200(5.080)

MAX

.005(0.127)

MIN

.405(10.287)

MAX

.220 – .310(5.588 – 7.874)

1 2 3 4

8 7 6 5

.025(0.635)

RAD TYP

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS

J8 Package8-Lead CERDIP (Narrow .300 Inch, Hermetic)

(Reference LTC DWG # 05-08-1110)

OBSOLETE PACKAGE


lt1195 - low power, high speed operational amplifier · the lt ®1195 is a video operational...

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