SBAU394A April   2022  – September 2022

 

  1.   ADS1285 Evaluation Module
  2.   Trademarks
  3. 1 EVM Overview
    1. 1.1 ADS1285EVM-PDK Kit
  4. 2 ADS1285EVM-PDK Quick-Start Guide
  5. 3 EVM Analog Interface
    1. 3.1 ADC Analog Input Signal Path
    2. 3.2 ADC Input Clock (CLK) Options
  6. 4 Digital Interface
    1. 4.1 Connection to the PHI
    2. 4.2 Digital Header
  7. 5 Power Supplies
  8. 6 Digital-to-Analog Converter
  9. 7 ADS1285EVM-PDK Initial Setup
    1. 7.1 Default Jumper Settings
    2. 7.2 EVM Graphical User Interface (GUI) Software Installation
  10. 8 ADS1285EVM-PDK Software Reference
    1. 8.1 EVM GUI Global Settings for ADC Control
    2. 8.2 Register Map Configuration Tool
    3. 8.3 Time Domain Display Tool
    4. 8.4 Spectral Analysis Tool
    5. 8.5 Histogram Tool
    6. 8.6 DAC Configuration Tool
  11. 9 ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics
    1. 9.1 Bill of Materials
    2. 9.2 PCB Layout
    3. 9.3 Schematics
  12. 10References
  13. 11Revision History

8.5 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 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 8-5, the histogram corresponding to a DC input is displayed on clicking the Capture button.

GUID-20220407-SS0I-J3N6-K224-XRKRTVQMZSPP-low.jpgFigure 8-5 Histogram Analysis Tool