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

2.3.2 Input Signal Path

This section describes the circuitry of the input signal path.

The EZShunt digital power monitors provide an integrated shunt (IS+ to IS-), Kelvin sense connections (SH+ to SH-), and ADC differential input pins (IN+ and IN-). Thus, these devices have the ability to implement differential input filtering if desired in between the SH+/SHI pins and the IN+/IN- pins; however, to maximize thermal capability the input filters cannot be added to the EVM as of now because Kelvin sense pins are electrically tied to internal ADC input pins. If current filtering is necessary, then a user can configure longer conversion times and/or higher number of averages for the current register.

The VBUS pin is also electrically tied to the IS+ net to also optimize thermal performance.

All that is necessary to provide an input signal to U1 is to simply insert the IS+ (MP1) and IS- (MP2) nets in-series of the EVM with any current carrying wire provided the current and voltage are within EVM limits.