SBOU264B May   2021  – December 2022 INA232 , INA234 , INA236

 

  1.   Abstract
  2. 1Trademarks
  3. 2Overview
    1. 2.1 Kit Contents
    2. 2.2 Related Documentation From Texas Instruments
  4. 3Hardware
    1. 3.1 Features
  5. 4Operation
    1. 4.1 Quick Start Setup
    2. 4.2 EVM Operation
      1. 4.2.1 Setup
        1. 4.2.1.1 Driver Installation
        2. 4.2.1.2 Firmware
          1. 4.2.1.2.1 Firmware Debug
        3. 4.2.1.3 GUI Setup and Connection
          1. 4.2.1.3.1 Initial Setup
          2. 4.2.1.3.2 GUI to EVM Connection
      2. 4.2.2 GUI Operation
        1. 4.2.2.1 Homepage Tab
        2. 4.2.2.2 Configuration Tab
        3. 4.2.2.3 Registers Tab
        4. 4.2.2.4 Results Data Tab
      3. 4.2.3 Current Sensing Operation
        1. 4.2.3.1 Without Shunt Resistor
        2. 4.2.3.2 With Shunt Resistor
      4. 4.2.4 Direct EVM USB Communication
        1. 4.2.4.1 Standard USB CDC Read and Write Operations
        2. 4.2.4.2 Collect Data Through the USB BULK Channel
  6. 5Circuitry
    1. 5.1 Current Sensing IC
    2. 5.2 Input Signal Path
    3. 5.3 Digital Circuitry
      1. 5.3.1 I2C
  7. 6Schematics, PCB Layout, and Bill of Materials
    1. 6.1 Schematics
      1. 6.1.1 SENS079 (INA234EVM, INA236EVM)
      2. 6.1.2 SENS090 (INA232EVM)
    2. 6.2 PCB Layout
      1. 6.2.1 SENS079 (INA234EVM, INA236EVM)
      2. 6.2.2 SENS090 (INA232EVM)
    3. 6.3 Bill of Materials
      1. 6.3.1 SENS079 (INA234EVM, INA236EVM)
      2. 6.3.2 SENS090 (INA232EVM)
  8. 7Revision History

4.2.3 Current Sensing Operation

The EVM allows the user to either emulate the voltage developed across a sense resistor based on a given set of system conditions by applying a differential voltage across the IN+ and IN– terminals directly, or to connect the device inputs to an external shunt. Optionally, a 2512 surface-mount technology (SMT) shunt resistor can be soldered across the pads of R1, and these inputs can be connected in series with the external system and load current. There are two terminals each for IN+ (J1 pins 5 and 6) and IN– (J1 pins 3 and 4) for convenience.