INA166

Copyright © 2000, Texas Instruments Incorporated

SBOS178

Printed in U.S.A. December, 2000

Low-Noise, Low-Distortion, G = 2000

INSTRUMENTATION AMPLIFIER

DESCRIPTION

The INA166 is a very low-noise, low-distortion, mon-

olithic instrumentation amplifier. Its current-feedback

circuitry achieves very wide bandwidth and excellent

dynamic response over a wide range of gain. It is ideal

for low-level signals such as microphones or hydro-

phones. Many industrial, instrumentation, and medical

applications also benefit from its low noise and wide

bandwidth.

APPLICATIONS

q MOVING-COIL TRANSDUCER AMPLIFIERS

q DIFFERENTIAL RECEIVERS

q BRIDGE TRANSDUCER AMPLIFIERS

q MICROPHONE AND HYDROPHONE

PREAMPS

www.ti.com

FEATURES

q LOW NOISE: 1.3nV/

√Hz at 1kHz

q LOW THD+N: 0.09% at 1kHz

q WIDE BANDWIDTH: 450kHz

q WIDE SUPPLY RANGE:

±4.5V to ±18V

q HIGH CMR: > 100dB

q GAIN SET WITH EXTERNAL RESISTOR

q SO-14 SURFACE-MOUNT PACKAGE

INA166

Unique distortion cancellation circuitry reduces dis-

tortion to extremely low levels, even in high gain.

The INA166 provides near-theoretical noise perfor-

mance for 200

Ω source impedance. Its differential

input, low noise, and low distortion provide superior

performance as a low-level signal amplifier.

The INA166 is available in a space-saving SO-14

surface-mount package, specified for operation over

the –40

°C to +85°C temperature range.

A1

A2

A3

6k

Ω

60k

Ω

Sense

8

9

10

14

11

6

4

3

12

5

6k

Ω

60k

Ω

V

IN

–

+

V

IN

30.3

Ω

1

V

O2

V

O1

V+

V–

INA166

G = 2000

3k

Ω

3k

Ω

V

O

Ref