SLOU567B March   2025  – November 2025 THS3470

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Configuration Details
    1. 2.1 Heat Sink Usage
    2. 2.2 Power Connections
    3. 2.3 Input and Output Connections
    4. 2.4 Output Current Limits
    5. 2.5 Power Control Modes
    6. 2.6 Die Temperature and Output Current Readings
  7. 3Quick Start Instructions
    1. 3.1 Required Equipment for Basic Evaluation
    2. 3.2 Steps for Standard AC or DC Evaluation
    3. 3.3 Using Multiple Power Supplies
    4. 3.4 TI Evaluation Setup Images
  8. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  9. 5Additional Information
    1. 5.1 Trademarks
  10. 6Revision History

2.3 Input and Output Connections

The THS3470REBEVM features a simple input network with a 50Ω terminated connection on the positive amplifier input (J7). By default, the feedback network is connected in a non-inverting gain of approximately 5V/V. The amplifier can be driven in an inverting configuration through the input J6 by populating R1 and reconfiguring the gain as needed.

The default output of the THS3470REBEVM includes a simple series 4.7Ω isolation resistor R4 located close to the device output along with a 44.2Ω series output resistor R2 to provide a 50Ω matched impedance from the output connector J8. The output also includes an optional high power load through R11, which is a 10Ω 25W resistor by default. To connect R11, short the unpopulated jumper resistor R7. Additional unpopulated loads to ground R6, C17, and R8 are provided for use as needed.

WARNING: Driving very high output voltage DC or slow transient signals into a resistive load does have potential to damage the device. Please use caution to maintain the device operation within the safe-operating region.