SBOU298 March   2024 INA4230 , INA4235

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 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
    4. 2.4 PAMB Compatibility
  8. 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 Configuration Tab
      3. 3.2.3 Registers Tab
      4. 3.2.4 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
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Related Documentation

2.3.2 Input Signal Path

This section describes the circuitry of the input signal path.

J1 and J5 are the main connection terminals. Pins 1 and 6 of J1 and J5 are used to tie the system ground to the EVM ground. Pins 2-5 of J1 and J5 are used for the each channel's IN+ and IN- connection.

R12, R1, R13 or R9 can be used for an optional onboard shunt resistor with a 2512 footprint. Alternatively, a shunt can be placed across the IN+ and IN– terminals of the desired channel on J1 or J5. If desired, a differential voltage can be applied directly for measurement tests.

Each channel has two resistors and a capacitor that combine to make an optional input filter. The resistors are populated with 0Ω resistors by default. When using input filtering, take into account the input bias current of the device. The capacitor can also be used without the resistors to reduce noise. See the data sheet for more info on input filtering. Each filter of the channels is as follows:

  • Channel 1 - R14, R15, C5
  • Channel 2 - R2, R3, C3
  • Channel 3 - R16, R17, C6
  • Channel 4 - R10, R11, C4