FEATURES

q LOW OFFSET VOLTAGE: 50

q LOW DRIFT: 0.5

q LOW INPUT BIAS CURRENT: 5nA max

q HIGH CMR: 120dB min

q INPUTS PROTECTED TO

q WIDE SUPPLY RANGE:

q LOW QUIESCENT CURRENT: 700

q 16-PIN PLASTIC DIP, SOL-16

DESCRIPTION

The INA2128 is a dual, low power, general purpose instrumen-

tation amplifier offering excellent accuracy. Its versatile

3-op amp design and small size make it ideal for a wide range

of applications. Current-feedback input circuitry provides wide

bandwidth even at high gain (200kHz at G = 100).

A single external resistor sets any gain from 1 to 10,000.

Internal input protection can withstand up to

±40V without

damage.

The INA2128 is laser-trimmed for very low offset voltage

(50

µV), drift (0.5µV/°C) and high common-mode rejection

(120dB at G

≥ 100). It operates with power supplies as low as

±2.25V, and quiescent current is only 700µA per IA—ideal for

battery-operated and multiple-channel systems.

The INA2128 is available in SOL-16 packages, specified

for the –40

°C to +85°C temperature range.

APPLICATIONS

q SENSOR AMPLIFIER

THERMOCOUPLE, RTD, BRIDGE

q MEDICAL INSTRUMENTATION

q MULTIPLE-CHANNEL SYSTEMS

q BATTERY OPERATED EQUIPMENT

Dual, Low Power

INSTRUMENTATION AMPLIFIER

40k

Ω

40k

Ω

40k

Ω

40k

Ω

1

3

4

2

16

14

13

15

7

6

5

10

11

12

V+

V–

INA2128

50k

Ω

–

+

Over-Voltage

Protection

25k

Ω

25k

Ω

Over-Voltage

Protection

40k

Ω

40k

Ω

8

9

40k

Ω

40k

Ω

50k

Ω

–

+

Over-Voltage

Protection

25k

Ω

25k

Ω

Over-Voltage

Protection

INA2128

INA2

128

INA2128

SBOS035A – DECEMBER 1995 – REVISED APRIL 2007

Copyright © 1995-2007, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

All trademarks are the property of their respective owners.