INA3221AIRGVR datasheet(10/46 Pages) TI1

Part #	INA3221AIRGVR

Description	Triple-Channel, High-Side Measurement, Shunt and Bus Voltage Monitor with I2C- and SMBUS-Compatible Interface

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Manufacturer	TI1 [Texas Instruments]

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Shunt Voltage

Channel

Bus Voltage

Channel

ADC

Shunt Voltage

(1)

Bus Voltage

(1)

Critical Limit

(2)

Warning Limit

(2)

Summation

(1)

Summation Limit

(2)

X

Channel 2

Channel 3

X

Power Valid

Upper Limit

(2)

Power Valid

Lower Limit

(2)

Channel 2

Channel 3

10

INA3221

SBOS576B – MAY 2012 – REVISED MARCH 2016

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8 Detailed Description

8.1 Overview

The INA3221 is a current-shunt and bus voltage monitor that communicates over an I2C- and SMBus-compatible

interface. The INA3221 provides digital shunt and bus voltage readings necessary for accurate decision making

in precisely-controlled systems, and also monitors multiple rails to maintain compliance voltages. Programmable

registers offer flexible configuration for measurement precision, and continuous versus single-shot operation. The

Register Maps section provides details of the INA3221 registers, beginning with Table 3.

8.2 Functional Block Diagram

(1)

Read-only.

(2)

Read/write.

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INA3221AIRGVR Datasheet(PDF) 10 Page - Texas Instruments

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