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

2.7 Best Practices

While key ideas and recommendations were included per section in this document, there are several overview recommendations:

  • Confirm FDA connections to DEM-FDA-RUN-EVM with appropriate solder and rework analysis
  • Confirm Iq (operating current) of FDA prior to testing
  • Confirm the intended setup of input/output connections:
    • Input network: single-ended versus differential, proper termination (RT) resistors (traces are 50Ω impedance matched)
    • Output network: transformer use, single-ended and differential, proper termination (RT) resistors for unused output SMAs, use of any attenuator or filtering on output
  • Confirm RF and RG match for both feedback paths. The FDA needs symmetrical feedback networks to function as intended.
  • FDAs require both outputs to operate. Unless you are using a transformer or impedance network in your application (system) circuit, you must expect to use both FDA outputs. Proper connection of only one of the FDA outputs results in reduced performance, lower robustness, and present debugging issues to the engineer.
  • Go slow: check the values in simulation or by calculation prior to setting-up the DEM-FDA-RUN-EVM.