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

3.2.2 Configuration Tab

To do the initial setup for each connected EVM, click the GUID-20210601-CA0I-ZL0K-7FVR-KGCZ3WC5BVK0-low.svg (Configuration) icon on the menu to the left. Figure 4-8 shows an example of the configuration tool, which can change based on the device connected.

GUID-20240226-SS0I-X0GC-QKBW-FVXXXGTCZNNC-low.svgFigure 3-8 Configuration Tool

From this page, the user can set the number of EVMs to use, and then for each EVM, indicate the physical hardware switch settings and configure the shunt and CURRENT_LSB. A description of each option and field on this page is located below:

  • Number of EVMs (currently disabled, GUI support coming soon).
    • This setting is used to tell the GUI how many EVMs are connected to the SCB.
    • Note, the SCB and GUI only support up to four EVMs at a time with the same device on each EVM.
    • Changing this here also changes the same setting in the Results Data tab.
  • Selected EVM (currently disabled, GUI support coming soon).

    • This setting indicates which EVM the user is changing settings for.

    • This also selects the EVM that is connected to the Registers page.
  • Selected Channel
    • This setting indicates which channel the user is changing settings for.
  • Hardware Switch Settings
    • Set these settings to match the physical switch settings on the EVM.
    • Note, this setting needs to be set before changing any other settings on this page. The GUI blocks the other settings until this is set.
    • Changing this also changes the same setting in the Results Data tab.
  • Shunt Full-Scale Differential Range
    • This is a shortcut to the ADCRANGE setting from the registers page; placed here for convenience.
    • Both this setting and the ADCRANGE setting from the register page change together.
  • Shunt and Current Configuration
    • This section is used to input shunt information as well as to help calculate the CURRENT_LSB and set the SHUNT_CAL register. Here is a description of how to use each field:
      • RSHUNT
        • Input the value of the used shunt resister in mΩ.
      • Max Expected Current
        • Input the value of the maximum expected current across the shunt resistor in Amps.
        • If the Max Expected Current field is left blank, then SHUNT_CAL can be adjusted manually, and the tool tells the True Max Current that can be measured with the EVM.
      • CURRENT_LSB
        • This is the calculated CURRENT_LSB value in Amps. This field gets populated automatically from the Max Expected Current field.
        • This field can be changed manually if desired, and changes filter downward.
      • SHUNT_CAL
        • Calculated value for SHUNT_CAL based off of RSHUNT and CURRENT_LSB. When this field changes, the value is automatically written to the SHUNT_CAL register.
        • When CURRENT_LSB is specified, changing ADCRANGE adjusts this value automatically per data sheet equations.
          • This happens if ADCRANGE is changed from either the configuration page or the register map.
          • If CURRENT_LSB is not specified, then this value remains unchanged, but the fields below adjusts to the new ADCRANGE.
        • This field can be changed manually if desired, and changes filter downward.
        • Changing this value from the register map page also changes here.
      • True CURRENT_LSB
        • This is the actual CURRENT_LSB value in Amps back calculated from the SHUNT_CAL register with the given shunt resistor value.
        • This is the value used for calculations in the Results Data section.
      • True Max Current
        • This is the maximum measurable current in Amps based off of the VSHUNT and CURRENT registers, using RSHUNT and the True CURRENT_LSB for calculations.
      • Required Sensing Range
        • This shows the required sensing range to measure the Max Expected Current with the specified shunt resistor.
        • If a Max Expected Current is not specified, then the True Max Current field is used instead.