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

2.2.1 USB Power and When to Power the Board Externally

The USB-C® connector is able to provide power to the TSWDC155EVM and ADS9212EVM using the default configuration, as discussed in Section 2.1. The combined peak current consumption reaches 600mA (typical) during the ADC conversion process and 520mA RMS (typical) after the ADS9212EVM is initialized in the GUI, as described in Section 3.3.

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 ADS9212EVM 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 ADS9212EVM, 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.