SBOU302A June   2023  – December 2023 INA740A , INA740B , INA745A , INA745B , INA780A , INA780B

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Quick Start Setup
    2. 2.2 EVM Operation
      1. 2.2.1 Current Sensing Operation
        1. 2.2.1.1 Detailed Setup
    3. 2.3 Circuitry
      1. 2.3.1 Current Sensing IC
      2. 2.3.2 Input Signal Path
      3. 2.3.3 Digital Circuitry
        1. 2.3.3.1 I2C
    4.     General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  7. 3Software
    1. 3.1 Setup
      1. 3.1.1 Driver Installation
      2. 3.1.2 Firmware
        1. 3.1.2.1 Firmware Debug
      3. 3.1.3 GUI Setup and Connection
        1. 3.1.3.1 Initial Setup
        2. 3.1.3.2 GUI to EVM Connection
    2. 3.2 GUI Operation
      1. 3.2.1 Homepage Tab
      2. 3.2.2 Registers Tab
      3. 3.2.3 Results Data Tab
    3. 3.3 Direct EVM USB Communication
      1. 3.3.1 Standard USB Read and Write Operations
      2. 3.3.2 Collect Data Through the USB BULK Channel
  8. 4Hardware Design Files
    1. 4.1 Schematics
      1. 4.1.1 SENS108 (INA740AEVM, INA740BEVM, INA741EVM)
      2. 4.1.2 SENS109 (INA745AEVM, INA745BEVM, INA746EVM)
      3. 4.1.3 SENS119 (INA780AEVM, INA780BEVM, INA781EVM)
    2. 4.2 PCB Layout
      1. 4.2.1 SENS108 (INA740AEVM, INA740BEVM, INA741EVM)
      2. 4.2.2 SENS109 (INA745AEVM, INA745BEVM, INA746EVM)
      3. 4.2.3 SENS119 (INA780AEVM, INA780BEVM, INA781EVM)
    3. 4.3 Bill of Materials
      1. 4.3.1 SENS108 (INA740-INA741EVM), SENS109 (INA745-INA746EVM), SENS119 (INA780-INA781EVM)
  9. 5Additional Information
    1. 5.1 Trademarks
  10. 6Related Documentation
  11. 7Revision History

2.3.1 Current Sensing IC

U1 is the main INA current-sensing device. The specific U1 variant is notated on the PCB via the population of a resistor in silkscreen table.

For the SENS108 PCB (INA740-INA741EVM), the 001, 002, and 003 variants have U1 populated with INA740A, INA740B, and INA741 respectively.

For the SENS109 (INA745-INA746EVM), the 001, 002, and 003 variants have U1 populated with INA745A, INA745B, and INA746 respectively.

For the SENS119 PCB (INA780-INA781EVM), the 001, 002, and 003 variants have U1 populated with INA780A, INA780B, and INA781 respectively.

C1 and C2 are bypass capacitors that are placed near the sensor to help mitigate power supply noise and provide current quickly to the device when needed. LED D1 with current limiting resistor R7 are used to indicate when the EVM is powered on.

The device pins can be monitored directly through the labeled test points and vias.