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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 © 2001-2006, 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.

FEATURES

q COMPLETE BIDIRECTIONAL CURRENT

MEASUREMENT CIRCUIT

q WIDE SUPPLY RANGE: 2.7V to 40V

q SUPPLY-INDEPENDENT COMMON-MODE

VOLTAGE: 2.7V TO 60V

q RESISTOR PROGRAMMABLE GAIN SET

q LOW QUIESCENT CURRENT: 75

µA (typ)

q MSOP-8 PACKAGE

High-Side, Bidirectional

CURRENT SHUNT MONITOR

DESCRIPTION

The INA170 is a high-side, bidirectional current shunt moni-

tor featuring a wide input common-mode voltage range, low

quiescent current, and a tiny MSOP-8 package.

Bidirectional current measurement is accomplished by out-

put offsetting. The offset voltage level is set with an external

resistor and voltage reference. This permits measurement of

a bidirectional shunt current while using a single supply for

the INA170.

Input common-mode and power-supply voltages are inde-

pendent. Input voltage can range from +2.7V to +60V on any

supply voltage from +2.7V to +40V. Low 10

µA input bias

current adds minimal error to the shunt current.

The INA170 converts a differential input voltage to a current

output. This current develops a voltage across an external

load resistor, setting any gain from 1 to over 100.

The INA170 is available in an MSOP-8 package, and is

specified over the extended industrial temperature range,

–40

°C to +85°C with operation from –55°C to +125°C.

APPLICATIONS

q CURRENT SHUNT MEASUREMENT:

Automotive, Telephone, Computers, Power

Systems, Test, General Instrumentation

q PORTABLE AND BATTERY-BACKUP

SYSTEMS

q BATTERY CHARGERS

q POWER MANAGEMENT

q CELL PHONES

INA170

SBOS193D – MARCH 2001 – REVISED JANUARY 2006

2

1

3

OUT

GND

INA170

Q1

A1

A2

Q2

6

4

I

S

V

REF

V+

V

SUPPLY

R

OS

8

5

Load

R

L

R

G1

1k

Ω

R

G2

1k

Ω

R

S

V

IN

V

IN

+

–

R

OS

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