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Design

INA139, INA169

SBOS181E – DECEMBER 2000 – REVISED DECEMBER 2015

INA1x9 High-Side Measurement Current Shunt Monitor

1 Features

3 Description

The INA139 and INA169 are high-side, unipolar,

1

•

Complete Unipolar High-side Current

current shunt monitors. Wide input common-mode

Measurement Circuit

voltage range, high-speed, low quiescent current, and

•

Wide Supply and Common-Mode Range

tiny SOT-23 packaging enable use in a variety of

•

INA139: 2.7 V to 40 V

applications.

•

INA169: 2.7 V to 60 V

Input common-mode and power-supply voltages are

•

Independent Supply and Input Common-Mode

independent and can range from 2.7 V to 40 V for the

INA139 and 2.7 V to 60 V for the INA169. Quiescent

Voltages

current is only 60 µA, which permits connecting the

•

Single Resistor Gain Set

power

supply

to

either

side

of

the

current

•

Low Quiescent Current: 60 µA (Typical)

measurement shunt with minimal error.

•

5-Pin, SOT-23 Packages

The device converts a differential input voltage to a

current output. This current is converted back to a

2 Applications

voltage with an external load resistor that sets any

gain from 1 to over 100. Although designed for

•

Current Shunt Measurement:

current

shunt

measurement,

the

circuit

invites

–

Automotive, Telephone, Computers

creative applications in measurement and level

•

Portable and Battery-Backup Systems

shifting.

•

Battery Chargers

Both the INA139 and INA169 are available in 5-pin

•

Power Management

SOT-23 packages, and are specified for the –40°C to

•

Cell Phones

85°C temperature range.

•

Precision Current Source

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA139

SOT-23 (5)

2.90 mm × 1.60 mm

INA169

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application Circuit

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.