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

6.5 Histogram Tool

Noise degrades ADC resolution and the histogram tool can be used to estimate effective resolution, which is an indicator of the number of bits of ADC resolution losses resulting from noise generated by the various sources connected to the ADC when measuring a DC signal. The cumulative effect of noise coupling to the ADC output from sources, such as the input drive circuits, the reference drive circuit, the ADC power supply, and the ADC itself is reflected in the standard deviation of the ADC output code histogram that is obtained by performing multiple conversions of a DC input applied to a given channel.

As shown in Figure 6-8, the histogram corresponding to a DC input is displayed on clicking the Capture button.

GUID-20230404-SS0I-QVJK-MCPV-X2XSVTSCH0TB-low.svgFigure 6-8 Histogram Analysis Tool