´

Power Register

Current Register

I C

2

Interface

Voltage Register

INA231

GND

BUS

ADC

V

I

A0

A1

ALERT

SDA

SCL

C

0.1 F

BYPASS

m

High-

Side

Shunt

Low-

Side

Shunt

Load

Alert Register

V

(Supply Voltage)

S

Power Supply

(0 V to 28 V)

INA231

www.ti.com

SBOS644 – FEBRUARY 2013

High- or Low-Side Measurement,

Check for Samples: INA231

1

FEATURES

DESCRIPTION

The INA231 is a current-shunt and power monitor

23

•

Bus Voltage Sensing From 0 V to +28 V

•

High- or Low-Side Sensing

programmable addresses. The INA231 monitors both

•

Current, Voltage, and Power Reporting

shunt

voltage

drops

and

bus

supply

voltage.

Programmable calibration value, conversion times,

•

High Accuracy:

and averaging combined with an internal multiplier

–

0.5% Gain Error (Max)

enable direct readouts of current in amperes and

–

50-

μV Offset (Max)

power in watts.

•

Configurable Averaging Options

The INA231 senses current on buses that vary from 0

•

Programmable Alert Threshold

V to +28 V, with the device powered from a single

+2.7-V to +5.5-V supply, drawing 330

μA (typical) of

•

supply current. The INA231 is specified over the

•

Power-Supply Operation: 2.7 V to 5.5 V

operating temperature range of –40°C to +125°C.

•

Package: 1.68-mm × 1.43-mm, WCSP-12

RELATED PRODUCTS

APPLICATIONS

DESCRIPTION

DEVICE

Current and power monitor with watchdog, peak-

•

Smartphones

INA209

hold, and fast comparator functions

•

Tablets

INA210, INA211,

Zerø-drift, low-cost, analog current shunt monitor

INA212, INA213,

•

Servers

series in small package

INA214

•

Computers

Zerø-drift, bidirectional current power monitor with

INA219

two-wire interface

•

Power Management

High or Low-side, bidirectional current and power

•

Battery Chargers

monitor with two-wire interface and programmable

INA226

alert

•

Power Supplies

•

Test Equipment

HIGH-OR LOW-SIDE SENSING

1

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.

2

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.