SBAU416C November   2022  – March 2025 ADS9813 , ADS9817

 

  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 Additional Images
    2. 2.2 ADS9813EVM and ADS9817EVM Quick Start Guide
    3. 2.3 Analog Interface
      1. 2.3.1 ADC Input SMA Connections
      2. 2.3.2 Voltage Reference
    4. 2.4 Digital Interface and Clock Inputs
      1. 2.4.1 Digital Interface Connections
      2. 2.4.2 Clock Select
    5. 2.5 Power Supplies
      1. 2.5.1 USB Power and When to Power the Board Externally
  7. 3Software
    1. 3.1 ADS9817EVM and ADS9813EVM Software Installation
      1. 3.1.1 USB Driver Installation
    2. 3.2 ADS9817EVM Software (ADS9817EVM-GUI)
      1. 3.2.1 Using the CONFIG Tab
      2. 3.2.2 Using the Capture Tab
      3. 3.2.3 Using the INL/DNL Tool
      4. 3.2.4 Using the Histogram Tab
    3. 3.3 ADS9813EVM Software (ADS98XXEVM-GUI)
      1. 3.3.1 Using Configuration Tab
      2. 3.3.2 Using the Data Capture Tab
      3. 3.3.3 Using the Linearity Analysis Tab
      4. 3.3.4 Using the Histogram Analysis Tab
  8. 4Hardware Design Files
    1. 4.1 Schematics
      1. 4.1.1 ADS9813EVM Schematics
      2. 4.1.2 ADS9817EVM Schematics
    2. 4.2 Layout
    3. 4.3 Bill of Materials (BOM)
      1. 4.3.1 ADS9813EVM Bill of Materials (BOM)
      2. 4.3.2 ADS9817EVM Bill of Materials (BOM)
  9. 5Additional Information
    1. 5.1 Trademarks
  10. 6Related Documentation
  11. 7Revision History

2.5.1 USB Power and When to Power the Board Externally

As discussed in Section 2.2, the USB-C® connector is able to provide power to the TSWDC155EVM and ADS9813EVM or ADS9817EVM using the default configuration. The combined peak current consumption reaches 600mA (typical) during the ADC conversion process and 520mA RMS (typical) after the ADS9813EVM or the ADS9817EVM is initialized in the GUI, as described in Section 3.2.1.

The TWDC155EVM is a high-power SuperSpeed (USB 3.0) device. This means a PC supplies up to 900mA from a compliant USB 3.0 port. However, many PC USB port configurations allow much less than this limit depending on the unit load handshake process, usually resulting from other devices on the bus. Tripping the current limit on a USB can result in cutting power to the USB port, excessive power dissipation or heating, depending on the PC port configuration. As a result, TI highly recommends to consider switching to an externally powered ADS9813EVM or ADS9817EVM and/or TSWDC155EVM if:

  • Only USB 1.0 or USB 2.0 ports are available.
  • There are multiple devices connected to the PC by USB at the same time.
  • The USB 3.0 port configuration for the PC is unknown.

To switch to the external power configuration on the ADS9813EVM or ADS9817EVM, move the jumper on JP4 to the EXT_PWR position and use the J1 terminal block to provide the required 5.2V to 5.5V supply. To switch to the external power configuration on TSWDC155EVM, move the jumper on J2 to the 5V (external) position and use the J10 terminal block or barrel jack connector to provide the required 5V supply.

USB hubs can cause possible device enumeration issues and are not recommended when communicating through the TSWDC155EVM.