SLVUDA2 July   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8.   General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  9. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Test Points
    3. 2.3 Setup
      1. 2.3.1 Reference Voltage
        1. 2.3.1.1 Configuration 1: REFA and REFB = GND
        2. 2.3.1.2 Configuration 2: OPA CH A Bias REFA and REFB
        3. 2.3.1.3 Configuration 3: REFA and REFB Bias Independently
      2. 2.3.2 Current Sensing
      3. 2.3.3 Input Filtering
      4. 2.3.4 Output Load
    4. 2.4 Best Practices
  10. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  11. 4Additional Information
    1. 4.1 Trademarks
    2. 4.2 Related Documentation

2.3.1.1 Configuration 1: REFA and REFB = GND

Figure 2-5 shows circuit for Configuration 1 and Table 2-4 outlines the header pin settings. The most common use case is to set both reference pins (REFA and REFB) to GND and the reference pins are connected together. By grounding the reference voltage, the transfer function simplifies to Equation 1.

Equation 1. V O U T =   ( + I N ) - ( - I N )
Table 2-4 Header Pins for Configuration 1
HEADER NAME SETTING
J12 Closed
J13 Closed (REFA to GND)
J14 Closed (REFB to GND)
INA1H94EVM Reference Pins Grounded Figure 2-5 Reference Pins Grounded