1

®

INA145

®

INA145

PDS-1567B

Printed in U.S.A. March, 2000

Programmable Gain

DIFFERENCE AMPLIFIER

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/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

For most current data sheet and other product

information, visit www.burr-brown.com

DESCRIPTION

The INA145 is a precision, unity-gain difference

amplifier consisting of a precision op amp and on-

chip precision resistor network. Two external resistors

set the gain from 1V/V to 1000V/V. The input com-

mon-mode voltage range extends beyond the positive

and negative rails.

On-chip precision resistors are laser-trimmed to achieve

accurate gain and high common-mode rejection. Ex-

cellent TCR tracking of these resistors assures contin-

ued high precision over temperature.

The INA145 is available in the SO-8 surface-mount

package specified for the extended industrial tempera-

ture range, –40

°C to +85°C.

FEATURES

q DIFFERENTIAL GAIN = 1V/V TO 1000V/V:

Set with External Resistors

q LOW QUIESCENT CURRENT: 570

q WIDE SUPPLY RANGE:

Single Supply: 4.5V to 36V

Dual Supplies:

q HIGH COMMON-MODE VOLTAGE:

q LOW GAIN ERROR: 0.01%

q HIGH CMR: 86dB

q SO-8 PACKAGE

APPLICATIONS

q CURRENT SHUNT MEASUREMENTS

q SENSOR AMPLIFIER

q DIFFERENTIAL LINE RECEIVER

q BATTERY POWERED SYSTEMS

INA145

R

5

10k

Ω

(1%)

A1

V

IN

INA145

V

O

R

2

40k

Ω

R

1

40k

Ω

V

IN

R

3

40k

Ω

R

4

40k

Ω

R

G1

R

G

R

G2

A2

V

01

Ref

V–

V+

G = 1

+

–

2

5

7

41

8

6

3

V

+–

SBOS120