SBAU402 april   2023

 

  1.   AMC131M03 Evaluation Module
  2.   Trademarks
  3. 1Introduction
    1. 1.1 AMC131M03EVM Kit
    2. 1.2 AMC131M03EVM Board
  4. 2EVM Analog Interface
    1. 2.1 ADC Analog Input Signal Path
    2. 2.2 ADC External Clock (CLKIN) Options
  5. 3Digital Interface
    1. 3.1 SPI Communication
    2. 3.2 Connection to the PHI
    3. 3.3 Digital Header
  6. 4Power Supplies
  7. 5AMC131M03EVM Initial Setup
    1. 5.1 Default Jumper Settings
    2. 5.2 EVM Graphical User Interface (GUI) Software Installation
  8. 6AMC131M03EVM Operation
    1. 6.1 EVM GUI Global Settings for ADC Control
    2. 6.2 Register Map Configuration Tool
    3. 6.3 Time Domain Display Tool
    4. 6.4 Spectral Analysis Tool
    5. 6.5 Histogram Tool
  9. 7AMC131M03EVM Bill of Materials, PCB Layout, and Schematic
    1. 7.1 PCB Layout
    2. 7.2 Schematics
    3. 7.3 Bill of Materials

6.4 Spectral Analysis Tool

The spectral analysis tool, shown in Figure 6-7, is intended to evaluate the dynamic performance (SNR, THD, SFDR, SINAD, and ENOB) of the AMC131M03 ADC through single-tone sinusoidal signal FFT analysis using the 7-term Blackman-Harris window setting.

GUID-20230404-SS0I-Z6J9-00MJ-2WZMPB88SMNK-low.svgFigure 6-7 Spectral Analysis Tool

The FFT tool includes windowing options that are required to mitigate the effects of non-coherent sampling (this discussion is beyond the scope of this document). The 7-Term Blackman Harris window is the default option and has sufficient dynamic range to resolve the frequency components up to a 24-bit ADC. The None option corresponds to not using a window (or using a rectangular window) and is not recommended.