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

2.4 Digital Interface Connections

The ADS9212 uses SPI to configure the internal device registers (SCLK, SDI, SDO, CSn, and SPI_EN). A separate CMOS interface is used for capturing conversion data for each ADC channel using up to four output data lanes (D0, D1, D2, and D3). The SPI and CMOS interface signals connect to the FMC connector (J19). The FMC connector signal definition is shown in Figure 2-5. These signals are also available via test points for scope measurements as indicated in PCB silkscreen.

The FMC connector pinout below can also be interfaced with standard FPGA development kits. Note that the TI-provided software GUI is only compatible with the TSWDC155EVM and third-party software development is not supported.

ADS9212EVM Digital I/O Figure 2-5 Digital I/O

The digital communication lines for the ADS9212 ADC are CMOS interface and are connected with optional termination resistors, as shown in Figure 2-6. A digital serial peripheral interface (SPI) port is used to configure registers in the device. The necessary decoupling capacitors for analog supplies, digital supplies, and ADC reference voltages are shown in Figure 2-6.

ADS9212EVM Connections to ADS9212 Figure 2-6 Connections to ADS9212