Low-Noise, Low-Distortion

INSTRUMENTATION AMPLIFIER

APPLICATIONS

q PROFESSIONAL MICROPHONE PREAMPS

q MOVING-COIL TRANSDUCER AMPLIFIERS

q DIFFERENTIAL RECEIVERS

q BRIDGE TRANSDUCER AMPLIFIERS

FEATURES

q LOW NOISE: 1nV/

√Hz at 1kHz

q LOW THD+N: 0.002% at 1kHz, G = 100

q WIDE BANDWIDTH: 800kHz at G = 100

q WIDE SUPPLY RANGE:

±4.5V to ±18V

q HIGH CMR: > 100dB

q GAIN SET WITH EXTERNAL RESISTOR

q SO-14 SURFACE-MOUNT PACKAGE

DESCRIPTION

The INA163 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 audio signals such as balanced low-

impedance microphones. Many industrial, instrumen-

tation, and medical applications also benefit from its

low noise and wide bandwidth.

Unique distortion cancellation circuitry reduces distor-

tion to extremely low levels, even in high gain. The

INA163 provides near-theoretical noise performance

for 200

Ω source impedance. Its differential input, low

noise, and low distortion provide superior performance

in professional microphone amplifier applications.

The INA163’s wide supply voltage, excellent output

voltage swing, and high output current drive allow its

use in high-level audio stages as well.

The INA163 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

6k

Ω

Sense

8

9

10

14

11

6

4

3

12

5

6k

Ω

6k

Ω

V

IN

−

V

IN+

R

G

1

V

O2

V

O1

V+

V

−

INA163

G = 1 +

6000

R

G

3k

Ω

3k

Ω

V

O

Ref

INA163

SBOS177D – NOVEMBER 2000 – REVISED MAY 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 © 2000–2005, 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.