SBAU416B November   2022  – January 2024 ADS9813

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Overview
    1. 1.1 ADS9813EVM and ADS9817EVM Features
  5. 2ADS9813EVM and ADS9817EVM Quick Start Guide
  6. 3Analog Interface
    1. 3.1 ADC Input SMA Connections
    2. 3.2 Voltage Reference
  7. 4Digital Interface and Clock Inputs
    1. 4.1 Digital Interface Connections
    2. 4.2 Clock Select
  8. 5Power Supplies
    1. 5.1 USB Power and When to Power the Board Externally
  9. 6ADS9813EVM and ADS9817EVM Software Reference
    1. 6.1 ADS9813EVM-GUI and ADS9817EVM-GUI Software Installation
    2. 6.2 USB Driver Installation
    3. 6.3 Using the CONFIG Tab
    4. 6.4 Using the Capture Tab
    5. 6.5 Using the INL/DNL Tool
    6. 6.6 Using the Histogram Tab
  10. 7Schematics, Layouts, and Bill of Materials
    1. 7.1 Schematics
      1. 7.1.1 ADS9813EVM Schematics
      2. 7.1.2 ADS9817EVM Schematics
    2. 7.2 Layout
    3. 7.3 Bill of Materials (BOM)
      1. 7.3.1 ADS9813EVM Bill of Materials (BOM)
      2. 7.3.2 ADS9817EVM Bill of Materials (BOM)
  11. 8Revision History

4.1 Digital Interface Connections

The ADS9813 and ADS9817 use 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. Figure 4-1 provides the FMC connector signal definition. 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.

GUID-20230329-SS0I-9JSK-VXCZ-JXNPR983BCSJ-low.svgFigure 4-1 Digital I/O

The digital communication lines for the ADS9817 ADC (shown in Figure 4-2) are CMOS interface and are connected with optional termination resistors. The digital communication lines for the ADS9813 ADC are identical and can be seen in Figure 4-2. A digital serial peripheral interface (SPI) port is used to configure registers in the device. Figure 4-2 also shows the necessary decoupling capacitors for analog supplies, digital supplies, and ADC reference voltages.

GUID-20230523-SS0I-TWGF-DHHV-8860XQ27R4TC-low.svgFigure 4-2 Connections to ADS9817