SBAU413A october   2022  – may 2023

 

  1.   Abstract
  2.   Trademarks
  3. 1EVM Overview
    1. 1.1 ADS131B26Q1EVM-PDK Features
    2. 1.2 ADS131B26Q1EVM-PDK Quick-Start Guide
  4. 2Analog Interface
    1. 2.1 Terminal Blocks and Test Points
    2. 2.2 ADC1A and ADC1B
    3. 2.3 ADC2A and ADC2B
    4. 2.4 ADC3A and ADC3B
  5. 3Digital Interface
    1. 3.1 Connection to the PHI Controller
    2. 3.2 Digital Header
    3. 3.3 Clock Options
  6. 4Power Supplies
    1. 4.1 DC/DC Converter Circuit
    2. 4.2 ADC Power Supplies
    3. 4.3 Power Supply and Voltage Reference Decoupling
  7. 5ADS131B26Q1EVM-PDK Initial Setup
    1. 5.1 Default Jumper Settings
    2. 5.2 EVM Graphical User Interface (GUI) Software Installation
  8. 6ADS131B26Q1EVM-PDK Software Reference
    1. 6.1 Global Settings for ADC Control
    2. 6.2 Register Map Configuration
      1. 6.2.1 Register Map Basics
      2. 6.2.2 ADC1A, ADC3A and ADC1B, ADC3B Configuration
      3. 6.2.3 ADC2A and ADC2B Configuration
    3. 6.3 Analysis Tools
      1. 6.3.1 Time Domain Display
      2. 6.3.2 Spectral Analysis Tool
      3. 6.3.3 Histogram Analysis
      4. 6.3.4 Sequencer Analysis
  9. 7ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics
    1. 7.1 Bill of Materials (BOM)
    2. 7.2 PCB Layout
    3. 7.3 Schematics
  10. 8Revision History

6.3.4 Sequencer Analysis

The Sequencer Analysis tool displays the raw ADC conversion data for ADC2A and ADC2B. This tool can be accessed by selecting the Sequencer Configurations page from the top-left side of the GUI window. This page defaults to the Sequencer Configurations tab explained in Section 6.2.3. When the sequencer steps are enabled and configured, select the right tab at the top of the window to access the Sequencer Analysis display.

From the Sequencer Analysis page, initiate a data capture by specifying the desired number of sequencer iterations in the Samples drop-down menu and clicking the Capture button on the left side of the window. This button collects the specified number of samples from each sequencer step that is enabled. The GUI uses Sequencer Mode 01b, which initiates a new sequence of measurements after each DRDYn falling edge. For demonstration purposes, the GUI configures ADC1A and ADC1B to use the highest OSR setting, which produces the minimum data rate and allows the maximum time for each sequence to complete.

The sequencer results are plotted by the Iteration number on the x-axis of the graph. Each enabled sequence step is automatically enabled for display, but the user can deselect any plot by unchecking the box next to the sequence step in the legend on the right side. Below the plot is a Results summary table, which lists the results from each step and each sequence iteration. The results in the plot and summary table can be displayed in either Codes or Voltage (V) by using the radio buttons on the bottom-right. Figure 6-8 shows an example sequencer data capture.

GUID-20220926-SS0I-1HGW-BMHF-KJTGTPWNS260-low.svgFigure 6-8 Sequencer Analysis Tool