ina3221-q1 datasheet(9/45 Pages) TI1

Part #	INA3221-Q1

Description	Current and Voltage Monitor with Programmable Overcurrent Alerts

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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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

9

INA3221-Q1

www.ti.com

SBOS776B – MARCH 2016 – REVISED MARCH 2016

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8 Detailed Description

8.1 Overview

The INA3221-Q1 is a current-shunt and bus voltage monitor that communicates over an I2C- and SMBus-

compatible interface. The INA3221-Q1 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-Q1 registers, beginning with

Table 3.

8.2 Functional Block Diagram

(1)

Read-only.

(2)

Read/write.

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INA3221-Q1 Datasheet(PDF) 9 Page - Texas Instruments

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