The INA3221 board seen from above at an angle: a wide black board with three blue two-way screw terminals marked CH3, CH2 and CH1 along the back edge and a three-way one marked GND beside them, a 14-pin header along the front edge labelled CRI, WAR, TC, PV, VPU, three pairs of plus and minus, and three grounds, and a four-pin right-angle header on the left labelled GND, VCC, SDA and SCL.

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INA3221 Triple-Channel Current and Voltage Monitor

Two I²C current and voltage monitors: the TK119 with one INA219 on a 100 mΩ shunt, and the INA3221 with three channels on 50 mΩ. What the chip measures and what it works out, why the two resistors differ, the range and step each one gives, and the wiring for both.

Channels: 3measured at once
Full scale: 3.28A per channel
Rails: 0 to 26V
Alerts: 4open-drain pins

Start here · 01 What a shunt measures The reference

Product questions & answers ↓

The whole handbook11 articles · 60 min DatasheetPDF · ti.com Pinout and specsThe pin table, and the questions people ask first

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INA3221 Triple-Channel Current and Voltage Monitor

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