SBOU126A April   2012  – October 2026 INA3221 , INA3221-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
  6. 2Hardware
    1. 2.1 Setup
      1. 2.1.1 INA3221 Hardware Theory of Operation
      2. 2.1.2 H1 Signal Definitions (10-Pin Male Connector Socket)
        1. 2.1.2.1 SM-USB-DIG Platform Theory of Operation
    2. 2.2 INA3221EVM Hardware Overview
      1. 2.2.1 Electrostatic Discharge Warning
      2. 2.2.2 Connecting the Hardware
      3. 2.2.3 Connecting the USB Cable to the SM-USB-DIG Platform
      4. 2.2.4 INA3221EVM Features
        1. 2.2.4.1 J3: I2C VS Control Setting
        2. 2.2.4.2 J1 and J2: I2C Address Hardware Setting (A0)
        3. 2.2.4.3 External I2C Lines and Terminal Block T1
        4. 2.2.4.4 Shunt Monitor Configuration and Terminal Blocks T3, T5, and T6
    3. 2.3 Power Requirements
      1. 2.3.1 Connecting Power
    4. 2.4 Jumper Information
      1. 2.4.1 Default Jumper Settings
  7. 3Software
    1. 3.1 INA3221EVM Software Setup
      1. 3.1.1 INA3221EVM Software Operating Systems
      2. 3.1.2 Software Installation
    2. 3.2 INA3221EVM Software Overview
      1. 3.2.1 Starting the INA3221EVM Software
      2. 3.2.2 Using the INA3221EVM Software
        1. 3.2.2.1 INA3221 Bus Voltage, Shunt Voltage, and Shunt Voltage Sum Reading Bar
        2. 3.2.2.2 Register Tab
        3. 3.2.2.3 Graph Tab
        4. 3.2.2.4 Auto-Write and DVDD Voltage
  8. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  9. 5Related Documentation
  10. 6Revision History

1.3 Device Information

The INA3221 is a three-channel, high-side current sensor and bus voltage monitor with an I2C™ interface. The INA3221 monitors both shunt drops and bus supply voltages with programmable conversion times and averaging modes. The INA3221 offers both critical and warning alerts to detect multiple programmable out-of-range conditions for each channel. This document gives a general overview of the INA3221EVM, and provides a general description of the features and functions to be considered while using this evaluation module.