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

2.3.3 Digital Circuitry

This section describes the digital circuitry around the device.

J2 and J3 are the main header pins that connect the digital and power pins to the SCB Controller or other EVMs. J3 connects to the EVM/SCB on the right, while J2 connects to more EVMs on the left. R5 and R6 are used as pullup resistors for the main digital IO pins.

SW0 and SW1 set the I2C address of the device. This can be useful when using the EVM with a custom controller (other than the SCB Controller), or when connecting multiple EVMs together. Currently the SCB Controller and GUI are set up to use four EVMs at a time.

R8 is used as a pullup resistor for the ALERT pin. LED D2 and current limiting resistor R7 are used to indicate when the ALERT has triggered. U2 is an open-drain buffer that forwards the alert signal to J2 and J3 without allowing the signal to propagate from the ALERT bus to the device. This feature is primarily used when working with multiple EVMs, so that the individual ALERT LEDs can be seen on each EVM while still using the ALERT bus. C8 is a bypass capacitor placed near the buffer to mitigate power supply noise and to help provide current quickly to the device when needed.