Power Supply

(0 V to 26 V)

Load 1

Load 2

Power Supply

(0 V to 26 V)

Load 3

Power Supply

(0 V to 26 V)

0.1 µF

Voltage)

CH 1

CH 2

CH 3

I

and

SMBus-

Compatible

Interface

SDA

SCL

A0

Critical

Warning

GND

ADC

Shunt

Voltages 1-3

Critical Limit

Alerts 1-3

Bus

Voltages 1-3

Power Valid (PV)

Timing Control (TC)

Shunt Voltage

Sum Alerts

10 k

VPU

10 k

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Folder

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Technical

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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.

INA3221-Q1

SBOS776B – MARCH 2016 – REVISED MARCH 2016

INA3221-Q1 Automotive, 26-V, Triple-Channel, Bidirectional, Zero-Drift, Low- or High-Side,

1

1 Features

1

•

Qualified for Automotive Applications

•

AEC-Q100 Qualified With the Following Results:

–

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

–

Device HBM ESD Classification Level 2

–

Device CDM ESD Classification Level C6

•

Senses Bus Voltages From 0 V to 26 V

•

Reports Shunt and Bus Voltage

•

High Accuracy:

–

Offset Voltage: ±80 µV (max)

–

Gain Error: 0.25% (max)

•

Configurable Averaging Options

•

Four Programmable Addresses

•

Programmable Alert and Warning Outputs

•

Power-Supply Operation: 2.7 V to 5.5 V

2 Applications

•

Infotainment

•

Rear-Seat Entertainment

•

Digital Clusters

•

Electronic Control Units

3 Description

The INA3221-Q1 is a three-channel, high-side current

compatible interface. The INA3221-Q1 monitors both

shunt voltage drops and bus supply voltages, in

addition to having programmable conversion times

and

averaging

modes

for

these

signals.

The

INA3221-Q1 offers both critical and warning alerts to

detect multiple programmable out-of-range conditions

for each channel.

The INA3221-Q1 senses current on buses that can

vary from 0 V to 26 V. The device is powered from a

single 2.7-V to 5.5-V supply, and draws 350

μA (typ)

of supply current. The INA3221-Q1 is specified over

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

four programmable addresses.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA3221-Q1

VQFN (16)

4.00 mm x 4.00 mm

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

at the end of the datasheet.

Typical Application