1

FEATURES

DESCRIPTION

APPLICATIONS

´

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

High or Low Side, Bi-Directional

CURRENT/POWER MONITOR

with Two-Wire Interface

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: 1% (Max) OVER

multiplying register calculates power in watts. The

Two-Wire

interface

features

16

programmable

TEMPERATURE

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 senses across shunts on buses that can

• MSOP-10 PACKAGE

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

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

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

• SERVERS

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

+125°C.

• TELECOM EQUIPMENT

• NOTEBOOK COMPUTERS

RELATED PRODUCTS

• POWER MANAGEMENT

DESCRIPTION

DEVICE

• BATTERY CHARGERS

Current/Power Monitor with Watchdog,

• AUTOMOTIVE

Peak-Hold, and Fast Comparator

INA209

• POWER SUPPLIES

Functions

• TEST EQUIPMENT

Zerø-Drift, Low-Cost, Analog Current

Shunt Monitor Series in Small

INA210–INA214

Package

Zerø-Drift, Bi-Directional Current

Power Monitor with Two-Wire

INA219

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, 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.