Up to 60 V

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IN+

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S

V

IN+

V

IN–

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R

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V = I R R / 5 kΩ

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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.

INA138-Q1, INA168-Q1

SGLS174J – SEPTEMBER 2003 – REVISED AUGUST 2018

INA1x8-Q1 Automotive-Grade, High-Side, Current-Output, Current-Shunt Monitor

1

1 Features

1

•

Qualified for Automotive Applications

•

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature Range

–

Device HBM ESD Classification Level 2

–

Device CDM ESD Classification Level C6

•

Complete Unipolar High-Side Current-

Measurement Circuit

•

Wide Supply and Common-Mode Ranges:

–

INA138-Q1: 2.7 V to 36 V

–

INA168-Q1: 2.7 V to 60 V

•

Independent Supply and Input Common-Mode

Voltages

•

Single Resistor Gain Set

•

Low Quiescent Current (25 µA Typical)

•

Wide Temperature Range: –40°C to +125°C

•

Packages: TSSOP-8, SOT-23-5 (INA168-Q1)

2 Applications

•

Electric Power Steering (EPS) Systems

•

Body Control Modules

•

Brake Systems

•

Electronic Stability Control (ESC) Systems

3 Description

The INA138-Q1 and INA168-Q1 (INA1x8-Q1) devices

are high-side, unidirectional, current sense amplifiers.

Wide

input

common-mode

voltage

range,

low

quiescent

current,

and

TSSOP

and

SOT-23

packaging enable use in a variety of applications.

Input common-mode and power-supply voltages are

independent, and range from 2.7 V to 36 V for the

INA138-Q1, and 2.7 V to 60 V for the INA168-Q1.

Quiescent current is only 25 μA, which permits

connecting the power supply to either side of the

current-measurement shunt with minimal error.

The device converts a differential input voltage to a

current output. This current is converted back to a

voltage with an external load resistor that sets any

gain from 1 to over 100. Although designed for

current

shunt

measurement,

the

circuit

invites

creative applications in measurement and level

shifting.

Both devices are available in a TSSOP-8 package.

The INA168-Q1 is also available in a SOT-23-5

package. Both devices are specified for the –40°C to

+125°C temperature range.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA138-Q1

TSSOP (8)

4.40 mm × 3.00 mm

INA168-Q1

INA168-Q1

SOT-23 (5)

2.90 mm × 1.60 mm

(1) For all available packages, see the package option addendum

at the end of the data sheet.

Typical Application Circuit