PDS-1388B

Printed in U.S.A. October, 1997

100k

Ω

25k

Ω

25k

Ω

100k

Ω

INA122

5

4

2

1

8

3

7

6

R

G

V

IN

–

V

IN

+

V+

V

O

Ref

V–

200k

R

G

G = 5 +

V

–

+

®

INA122

INSTRUMENTATION AMPLIFIER

FEATURES

q LOW QUIESCENT CURRENT: 60

q WIDE POWER SUPPLY RANGE

Single Supply: 2.2V to 36V

Dual Supply: –0.9/+1.3V to

q COMMON-MODE RANGE TO (V–)–0.1V

q RAIL-TO-RAIL OUTPUT SWING

q LOW OFFSET VOLTAGE: 250

q LOW OFFSET DRIFT: 3

q LOW NOISE: 60nV/

√ Hz

q LOW INPUT BIAS CURRENT: 25nA max

q 8-PIN DIP AND SO-8 SURFACE-MOUNT

APPLICATIONS

q PORTABLE, BATTERY OPERATED

SYSTEMS

q INDUSTRIAL SENSOR AMPLIFIER:

Bridge, RTD, Thermocouple

q PHYSIOLOGICAL AMPLIFIER:

ECG, EEG, EMG

q MULTI-CHANNEL DATA ACQUISITION

INA122

INA122

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

DESCRIPTION

The INA122 is a precision instrumentation amplifier

for accurate, low noise differential signal acquisition.

Its two-op-amp design provides excellent performance

with very low quiescent current, and is ideal for

portable instrumentation and data acquisition systems.

The INA122 can be operated with single power sup-

plies from 2.2V to 36V and quiescent current is a mere

60

µA. It can also be operated from dual supplies. By

utilizing an input level-shift network, input common-

mode range extends to 0.1V below negative rail (single

supply ground).

A single external resistor sets gain from 5V/V to

10000V/V. Laser trimming provides very low offset

voltage (250

µV max), offset voltage drift (3µV/°C

max) and excellent common-mode rejection.

Package options include 8-pin plastic DIP and SO-8

surface-mount packages. Both are specified for the

–40

°C to +85°C extended industrial temperature range.