´

PowerRegister

CurrentRegister

Two-Wire

Interface

VoltageRegister

V

ADC

INA220

GND

V

I

V

IN+

V

IN-

A0

A1

SDA

DATA

SCL

CLK

C

0.1 F

BYPASS

m

+3.3Vto

+5V

BusVoltageInput

High-

Side

Shunt

Low-

Side

Shunt

R1

F

R2

F

C

F

Load

Supply(0to26V)

INA220

www.ti.com

SBOS459D – JUNE 2009 – REVISED SEPTEMBER 2010

High or Low Side, Bi-Directional

CURRENT/POWER MONITOR with Two-Wire Interface

Check for Samples: INA220

1

FEATURES

DESCRIPTION

2

•

HIGH- or LOW-SIDE SENSING

The INA220 is a current shunt and power monitor

with an Two-Wire interface. The INA220 monitors

•

SENSES BUS VOLTAGES FROM 0V TO +26V

both shunt drop and supply voltage. A programmable

•

REPORTS CURRENT, VOLTAGE, AND POWER

calibration value, combined with an internal multiplier,

•

16 PROGRAMMABLE ADDRESSES

enables direct readouts in amperes. An additional

•

HIGH ACCURACY: 0.5% (Max) OVER

multiplying register calculates power in watts. The

Two-Wire

interface

features

16

programmable

TEMPERATURE (INA220B)

addresses. The separate shunt input on the INA220

•

USER-PROGRAMMABLE CALIBRATION

allows it to be used in systems with low-side sensing.

•

FAST (3.4MHz) TWO-WIRE MODE

The INA220 is available in two grades: A and B. The

•

MSOP-10 PACKAGE

B grade version has higher accuracy and higher

precision specifications.

APPLICATIONS

The INA220 senses across shunts on buses that can

•

SERVERS

vary from 0V to 26V, useful for low-side sensing or

•

TELECOM EQUIPMENT

CPU power supplies. The device uses a single +3V

•

NOTEBOOK COMPUTERS

to +5.5V supply, drawing a maximum of 1mA of

•

POWER MANAGEMENT

supply current. The INA220 operates from –40°C to

+125°C.

•

BATTERY CHARGERS

•

AUTOMOTIVE

RELATED PRODUCTS

•

POWER SUPPLIES

DESCRIPTION

DEVICE

•

TEST EQUIPMENT

Current/Power Monitor with Watchdog, Peak-Hold,

INA209

and Fast Comparator Functions

INA210, INA211,

Zerø-Drift, Low-Cost, Analog Current Shunt Monitor

INA212, INA213,

Series in Small Package

INA214

Zerø-Drift, Bi-Directional Current Power Monitor with

INA219

Two-Wire Interface

General Load, Low- or High-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

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009–2010, 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.