SBAU461A May   2024  – November 2024 INA790A , INA790B , INA791A

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
    5. 1.5 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  8. 2Hardware
    1. 2.1 Circuitry
      1. 2.1.1 Bypass Capacitors
      2. 2.1.2 Output Filter
      3. 2.1.3 Configurable Gain
      4. 2.1.4 Configurable Reference Voltage
      5. 2.1.5 Thermal Alert Function
      6. 2.1.6 Load Connectors
      7. 2.1.7 INA79x Current-Sense Amplifier
  9. 3Implementation Results
    1. 3.1 Operation
      1. 3.1.1 Measurements
      2. 3.1.2 Advanced Measurement Tips
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Related Documentation From Texas Instruments
  13. 7Revision History

2.1.7 INA79x Current-Sense Amplifier

U1 is the INA79x current-sense amplifier. The INA79xEVM board comes with either of the four devices in the family (INA790A, INA790B, INA791A and INA791B ). Link to the correct orderable EVM is provided in individual product folders.

  • A differential voltage is generated when the load current flows through the integrated shunt that is connected across the inputs IS+ and IS–.
  • The INA79x can be configured to allow for unidirectional or bidirectional operation.
  • The INA79x gain can be configured to optimize output voltage swing.