SBOU285A April   2023  – July 2025 INA700 , INA701

 

  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 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
  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
  12. 7Revision History

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 or SCB on the right, while J2 connects to more EVMs on the left. R5 and R6 are used as pullup resistors for the SDA and SCL pins.

SW0 sets 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 up to 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. R9 is a pullup resistor for the ALERT bus. C3 is a bypass capacitor placed near the buffer to mitigate power supply noise and to help provide current quickly to the device when needed.

When connecting multiple EVMs together, the pullup resistors for the I2C Bus and the ALERT Bus of some EVMs can need to be removed to avoid pulling up too strongly.