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LT1792IN8

Low Noise, Precision, JFET Input Op Amp

Linear Technology 

LT1792

TYPICAL APPLICATI S

Light Balance Detection Circuit

R1

1M

I1

PD1

I2

PD2

C1

2pF TO 8pF

–

LT1792

+

VOUT

1792 TA07

VOUT = 1M × (I1 – I2)

PD1,PD2 = HAMAMATSU S1336-5BK

WHEN EQUAL LIGHT ENTERS PHOTODIODES, VOUT < 3mV.

Unity-Gain Buffer with Extended

Load Capacitance Drive Capability

R2

1k

C1

–

LT1792

+

VIN

R1

33Ω

VOUT

CL

1792 TA08

C1 = CL ≤ 0.1µF

OUTPUT SHORT-CIRCUIT CURRENT

(∼ 30mA) WILL LIMIT THE RATE AT WHICH THE

VOLTAGE CAN CHANGE ACROSS LARGE CAPACITORS

( ) I = C

dV

dt

PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.

N8 Package

8-Lead PDIP (Narrow 0.300)

(LTC DWG # 05-08-1510)

0.400*

(10.160)

MAX

8

7

6

5

0.255 ± 0.015*

(6.477 ± 0.381)

0.300 – 0.325

(7.620 – 8.255)

12

0.045 – 0.065

(1.143 – 1.651)

34

0.130 ± 0.005

(3.302 ± 0.127)

0.009 – 0.015

(0.229 – 0.381)

+0.035

0.325 –0.015

( ) 8.255

+0.889

–0.381

0.065

(1.651)

TYP

0.100 ± 0.010

(2.540 ± 0.254)

0.125

(3.175)

MIN

0.018 ± 0.003

(0.457 ± 0.076)

0.020

(0.508)

MIN

N8 1197

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

S8 Package

8-Lead Plastic Small Outline (Narrow 0.150)

(LTC DWG # 05-08-1610)

0.189 – 0.197*

(4.801 – 5.004)

8

7

6

5

0.228 – 0.244

(5.791 – 6.197)

0.150 – 0.157**

(3.810 – 3.988)

0.010

(0.254

–

–

0.020

0.508)

×

45°

0.008 – 0.010

(0.203 – 0.254)

1

2

0.053 – 0.069

(1.346 – 1.752)

0°– 8° TYP

0.016 – 0.050

0.406 – 1.270

*DIMENSION DOES NOT INCLUDE MOLD FLASH.

0.014 – 0.019

(0.355 – 0.483)

MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH.

INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

34

0.004 – 0.010

(0.101 – 0.254)

0.050

(1.270)

TYP SO8 0996

RELATED PARTS

PART NUMBER

LT1113

LT1169

LT1793

DESCRIPTION

Low Noise Dual JFET Op Amp

Low Noise Dual JFET Op Amp

Low Noise Single Op Amp

12 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com

COMMENTS

Dual Version of LT1792, VNOISE = 4.5nV/√Hz

Dual Version of LT1793, IB = 10pA, VNOISE = 6nV/√Hz

Lower IB Version of LT1792, IB = 10pA, VNOISE = 6nV/√Hz

1792f LTTP 0599 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1999

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