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

2.1 Package Selection and Pinout

INA219 is available in both the SOT23-8 and SOIC-8 packages, while INA232 is available in the SOT23-8 package. For an existing PCB design, the best chance of migrating from INA219 to INA232 without footprint change is with the SOT23. The two SOT23 packages are only different in height, other physical dimensions are essentially identical. Figure 2-1 shows the package and pinout of the two devices.

Pinout is also identical except pin 8, where pin 8 is the address for pin A1 for INA219, but is the ALERT output for INA232. It is common to leave address pins configurable through 0-Ω resistors. If this is the case for a design already in production, you can reconfigure this pin to enable switching between INA219 and INA232 through a BOM change. If the A1 pin on the INA219 is connected to ground, the INA232 likely can be used without any hardware change. The ALERT pin of INA232 is an open-drain output and can be connected to ground

Figure 2-1 Package and Pinout