INA131

Precision G = 100

INSTRUMENTATION AMPLIFIER

DESCRIPTION

The INA131 is a low cost, general purpose G = 100

instrumentation amplifier offering excellent accuracy.

Its 3-op amp design and small size make it ideal for

a wide range of applications.

On-chip laser trimmed resistors accurately set a fixed

gain of 100. The INA131 is laser trimmed to achieve

very low offset voltage (50

µV max), drift (0.25µV/°C

max), and high CMR (110dB min). Internal input

protection can withstand up to

±40V inputs without

damage.

The INA131 is available in a 8-pin plastic DIP. They

are specified over the –40

°C to +85°C temperature

range.

FEATURES

q LOW OFFSET VOLTAGE: 50

µV max

q LOW DRIFT: 0.25

µV/

°C max

q LOW INPUT BIAS CURRENT: 2nA max

q HIGH COMMON-MODE REJECTION:

110dB min

q INPUT OVERVOLTAGE PROTECTION:

±40V

q WIDE SUPPLY RANGE:

±2.25 to ±18V

q LOW QUIESCENT CURRENT: 3mA

q 8-PIN PLASTIC DIP

APPLICATIONS

q BRIDGE AMPLIFIER

q THERMOCOUPLE AMPLIFIER

q RTD SENSOR AMPLIFIER

q MEDICAL INSTRUMENTATION

q DATA ACQUISITION

®

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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

Over-Voltage

Protection

A

1

A

2

A

3

6

25k

Ω

5k

Ω

25k

Ω

25k

Ω

25k

Ω

5k

Ω

7

4

3

8

1

2

V

IN

V

IN

V+

V–

INA131

DIP

Ref

V

O = 100 (VIN – VIN)

–

+

+–

5

2.63k

Ω

Over-Voltage

Protection

INA131

©1992 Burr-Brown Corporation

PDS-1144E

Printed in U.S.A. March, 1998

SBOS016