High-Speed, Precision

DIFFERENCE AMPLIFIER

©1999 Burr-Brown Corporation

PDS-1483B

Printed in U.S.A. March, 1999

®

FEATURES

q DESIGNED FOR LOW COST

q LOW OFFSET VOLTAGE:

±500µV max

q LOW OFFSET DRIFT:

±2µV/°C

q LOW GAIN ERROR:

±0.05% max

q WIDE BANDWIDTH: 3MHz

q HIGH SLEW RATE: 14V/

µs

q FAST SETTLING TIME: 3

µs to 0.01%

q WIDE SUPPLY RANGE:

±4V to ±18V

q LOW QUIESCENT CURRENT: 2.4mA

q SO-8 SURFACE-MOUNT PACKAGE

INA157

DESCRIPTION

The INA157 is a high slew rate, G = 1/2 or G = 2

difference amplifier consisting of a precision op amp

with a precision resistor network. The on-chip resis-

tors are laser trimmed for accurate gain and high

common-mode rejection. Excellent TCR tracking of

the resistors maintains gain accuracy and common-

mode rejection over temperature. The input common-

mode voltage range extends beyond the positive and

negative supply rails. It operates on

±4V to ±18V

supplies.

The difference amplifier is the foundation of many

commonly used circuits. The INA157 provides this

circuit function without using an expensive precision

resistor network. The INA157 is available in a SO-8

surface-mount package and is specified for operation

over the extended industrial temperature range, –40

°C

to +85

°C.

APPLICATIONS

q DIFFERENTIAL INPUT AMPLIFIER

q INSTRUMENTATION AMPLIFIER

BUILDING BLOCK

q G = 1/2 AMPLIFIER

q G = 2 AMPLIFIER

q DIFFERENTIAL CURRENT RECEIVER

q VOLTAGE-CONTROLLED CURRENT SOURCE

q GROUND LOOP ELIMINATOR

q CURRENT SHUNT MONITOR

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

2

3

4

–In

+In

V–

6k

Ω

12k

Ω

6k

Ω

12k

Ω

5

1

Sense

Ref

6

Output

7

V+

INA157

For most current data sheet and other product

information, visit www.burr-brown.com

SBOS105