×

Power Register

Current Register

I C-/SMBUS-

2

Compatible

Interface

Voltage Register

V (Supply Voltage)

S

ADC

INA220

GND

V

I

V

IN+

V

IN-

A0

A1

SDA

DATA

SCL

CLK

C

BYPASS

0.1µF

+3.3V to

+5V

Bus Voltage Input

High-

Side

Shunt

Low-

Side

Shunt

R1

F

R2

F

C

F

Load

Supply (0 to 26V)

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

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.

INA220

SBOS459E – JUNE 2009 – REVISED JANUARY 2016

INA220 High- or Low-Side, Bidirectional Current and Power Monitor

With Two-Wire Interface

1

1 Features

1

•

High- or Low-Side Sensing

•

Senses Bus Voltages from 0 V to 26 V

•

Reports Current, Voltage, and Power

•

16 Programmable Addresses

•

High Accuracy: 0.5% (Maximum) Over

Temperature (INA220B)

•

User-Programmable Calibration

•

Interface

•

VSSOP-10 Package

2 Applications

•

Servers

•

Telecom Equipment

•

Notebook Computers

•

Power Management

•

Battery Chargers

•

Automotive

•

Power Supplies

•

Test Equipment

3 Description

The INA220 is a current shunt and power monitor

INA220 monitors both shunt drop and supply voltage.

A programmable calibration value, combined with an

internal

multiplier,

enables

direct

readouts

in

amperes. An additional multiplying register calculates

interface features 16 programmable addresses. The

separate shunt input on the INA220 allows it to be

used in systems with low-side sensing.

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

B grade version has higher accuracy and higher

precision specifications.

The INA220 senses across shunts on buses that can

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

CPU power supplies. The device uses a single 3- to

5.5-V supply, drawing a maximum of 1 mA of supply

current. The INA220 operates from –40°C to 125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA220

VSSOP (10)

3.00 mm × 3.00 mm

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

the end of the data sheet.

General Load, Low- or High-Side Sensing