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

3.1 Identify Suitable Migration Projects

Aside from compatible footprints, the INA219 and INA232 have considerable overlapping specifications despite the fact that each has unique features. Figure 3-1 shows the key features in a Venn diagram.

Figure 3-1 Key Features and Supported Design Parameters

In this example, an existing design with INA219 fits in the intersection region of Figure 3-1. The goal is to update the design with INA232. The best practice is to keep the firmware backward compatible so that the firmware works with hardware based on either INA219 or INA232.