SBAU456 September   2024 ADS9212

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  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 ADS9212EVM Quick Start Guide
    2. 2.2 Power Supplies
      1. 2.2.1 USB Power and When to Power the Board Externally
    3. 2.3 Analog Interface
      1. 2.3.1 ADC Input SMA Connections
      2. 2.3.2 Voltage Reference
    4. 2.4 Digital Interface Connections
    5. 2.5 Digital Interface and Clock Inputs
  7. 3Software
    1. 3.1 ADS9212EVM-GUI Software Installation
    2. 3.2 USB Driver Installation
    3. 3.3 Using the CONFIG Tab
    4. 3.4 Using the Capture Tab
    5. 3.5 Using the INL/DNL Tool
    6. 3.6 Using the Histogram Tab
  8. 4Hardware Design Files
    1. 4.1 Schematics
      1. 4.1.1 ADS9212EVM Schematics
    2. 4.2 Layout
    3. 4.3 Bill of Materials (BOM)
  9. 5Additional Information
    1. 5.1 Trademarks
  10. 6Related Documentation

2.5 Digital Interface and Clock Inputs

The ADS9212EVM uses single-ended sampling clock for ADC conversions. The positive sampling clock input (SMPL_CLKP) is selected using jumper JP8. Install a shunt in the [2-3] position (default) to source the clock signal from the TSWDC155EVM through the FMC connector. This allows the user to select the clock frequency from the options listed in the EVM GUI.

An external clock source can also be used to control ADC conversions. Connect a low-jitter clock source to SMA connector J14 and install a shunt in the [1-2] position on JP8.

The negative source of the sample clock (SMPL_CLKM) can be sourced from either the FMC connector (FMC_SMPL_CLKM) through R18 or GND through R17, respectively. By default, R17 is populated and R18 is uninstalled.

ADS9212EVM Sample Clock SelectionFigure 2-7 Sample Clock Selection