FEATURES

q LOW QUIESCENT CURRENT: 175

q WIDE SUPPLY RANGE:

q LOW OFFSET VOLTAGE: 250

q LOW OFFSET DRIFT: 3

q LOW NOISE: 35nV/

√Hz

q LOW INPUT BIAS CURRENT: 25nA max

q 8-PIN DIP, SO-8, MSOP-8 SURFACE- MOUNT

DUAL: 16-Pin DIP, SO-16, SSOP-16

Micro

POWER INSTRUMENTATION AMPLIFIER

Single and Dual Versions

DESCRIPTION

The INA126 and INA2126 are precision instrumentation ampli-

fiers for accurate, low noise differential signal acquisition. Their

two-op-amp design provides excellent performance with very

low quiescent current (175

µA/channel). This, combined with a

wide operating voltage range of

±1.35V to ±18V, makes them

ideal for portable instrumentation and data acquisition sys-

tems.

Gain can be set from 5V/V to 10000V/V with a single

external resistor. Laser trimmed input circuitry provides low

offset voltage (250

µV max), low offset voltage drift (3µV/°C

max) and excellent common-mode rejection.

Single version package options include 8-pin plastic DIP,

SO-8 surface mount, and fine-pitch MSOP-8 surface-mount.

Dual version is available in the space-saving SSOP-16 fine-

pitch surface mount, SO-16, and 16-pin DIP. All are specified

for the –40

°C to +85°C industrial temperature range.

APPLICATIONS

q INDUSTRIAL SENSOR AMPLIFIER:

Bridge, RTD, Thermocouple

q PHYSIOLOGICAL AMPLIFIER:

ECG, EEG, EMG

q MULTI-CHANNEL DATA ACQUISITION

q PORTABLE, BATTERY OPERATED SYSTEMS

INA1

26

INA2

126

INA2126

INA126

INA2126

INA126

INA2126

SBOS062A – JANUARY 1996 – REVISED AUGUST 2005

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.

Copyright © 1996-2005, 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.

All trademarks are the property of their respective owners.

40k

Ω

10k

Ω

10k

Ω

40k

Ω

INA126

5

4

2

1

8

3

7

6

R

G

V

IN

–

V

IN

+

V+

V–

V

–

+

80k

Ω

R

G

G = 5 +

40k

Ω

10k

Ω

10k

Ω

40k

Ω

INA2126

5

7

8

1

4

3

2

9

6

–

+

V+

V–

–

+

G = 5 +

–

+

G = 5 +

40k

Ω

10k

Ω

10k

Ω

40k

Ω

12

16

13

14

15

11

10

–

+

80k

Ω

R

G

80k

Ω

R

G