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

2.2.4.2 J1 and J2: I2C Address Hardware Setting (A0)

Jumpers J1 and J2 are used to set the hardware setting for the A0I2C address pin on the INA3221. Using J1, the A0 address can be set to either a logic '1' or a logic '0'. Using J2, the A0 address can be set to either the SCL or SDA communication line. Make sure to only have either J1 or J2 connected individually; failure to keep these lines separate can lead to board shorts and problems with the I2C communication lines. See Section 3.2.2.1 on how to configure the INA3221EVM software to match the J1 and J2 hardware setting.