SBOA539 January   2023 INA219 , INA232

 

  1.   Abstract
  2.   Trademarks
  3. 1Overview
    1. 1.1 INA232 and INA219
  4. 2Migrating From INA219 to INA232
    1. 2.1 Package Selection and Pinout
    2. 2.2 Device Address
    3. 2.3 Shunt Voltage Range
    4. 2.4 Power Supply and IO Voltage Levels
    5. 2.5 Digital Interface and Data Format
    6. 2.6 Register Set
    7. 2.7 Accuracy
    8. 2.8 Unique Features
  5. 3Implementation
    1. 3.1 Identify Suitable Migration Projects
    2. 3.2 Bench Setup and Hardware
    3. 3.3 Result Registers and Calculation
    4. 3.4 Software Implementation

2.2 Device Address

INA219 comes with two address pins which makes it possible to have direct access to sixteen (16) unique INA219 devices in the same system. Conversely, INA232 has only one address pin, which allows direct access to only four devices.

In designs where INA219 is used and address pin A1 is connected to GND, then the addressing is compatible between INA219 and INA232.

In systems where more than four power monitors are needed, increasing the number of INA232 devices through an I2C expander is possible.