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

2.3 Shunt Voltage Range

The front-end PGA in INA219 enables four shunt input voltages. The lowest range starts at ±40 mV. If larger full-scale shunt voltages are desired, the PGA function is capable of increasing the full-scale range by 2, 4, or 8 times (up to 320 mV). Additionally, the bus voltage measurement has two full-scale ranges: 16 V or 32 V, although the best practice is to limit the actual bus voltage to under 26 V to prevent damage to the device.

Two shunt input ranges are possible in INA232, namely ±20 mV and ±80 mV. INA232 has single full scale bus measurement range of up to 48 V.

As long as shunt input voltage is below the range of ±80 mV, both INA219 and INA232 can be used without changing the shunt resistor to a different value.