SBOU324 November   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Setup
    3. 2.3 FDA Input Network Options
    4. 2.4 Active MFB Filter
    5. 2.5 Control Signals
    6. 2.6 Test Points and Jumpers
    7. 2.7 Best Practices
  7. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  8. 4Additional Information
    1. 4.1 Trademarks

Setup

Setup for the DEM-FDA-RUN-EVM includes proper connections to bench equipment, test hardware, and selection of jumpers. The base process for setup includes:

  1. Connect power supplies via the banana jacks, labeled as VCC+, VCC-, and GND.
    1. Confirm appropriate quiescent current (IQ) for FDA with no input/output signal
  2. Determine input and output connections
    1. Connect external input sources through SMA connectors
    2. Confirm appropriate input termination and input network resistor values
    3. Determine amplifier load network, check impedance of output network for both amplifier and transformer (or SMA) directions
      1. For example, an amplifier may prefer a 1kΩ load, while a transformer or output SMA connector may need 50Ω termination
    4. Connect outputs via SMA connectors, confirm the values of output termination resistors R11 and R15.
    5. Use or bypass the transformer T1.
  3. Check and confirm load network between FDA outputs and transformer T1.
  4. Confirm control signals power-down (PD) and output common-mode voltage control (VOCM)
    1. Do one of the following:
      1. Float SMA connections and let the FDA set the control pins internally
      2. Force PD voltage using J10 jumper to VCC+ or VCC- as power-down control
      3. Drive an external signal into PD and/or VOCM
      4. PD default is to have FDA turned 'ON' (active-low PD)
      5. VOCM default is to have FDA VOCM biased to mid-supply
  5. Begin evaluation of FDA using DEM-FDA-RUN-EVM