SBAU491 May   2025 ADS9326 , ADS9327

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 ADS9327EVM Quick Start Guide
    2. 2.2 Analog Interface
      1. 2.2.1 Fully-Differential Circuit: THS4552
      2. 2.2.2 Voltage Reference
    3. 2.3 Power Supplies
      1. 2.3.1 USB Power and When to Power the Board Externally
  9. 3Software
    1. 3.1 Digital Interface and Clock Inputs
      1. 3.1.1 Digital Interface Connections
      2. 3.1.2 Clock Select
    2. 3.2 ADS9327EVM Software Reference
      1. 3.2.1 ADS9327EVM-GUI Software Installation
      2. 3.2.2 Using the CONFIG Tab
      3. 3.2.3 Using the Capture Tab
      4. 3.2.4 Using the INL/DNL Tool
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Related Documentation

2.3.1 USB Power and When to Power the Board Externally

As discussed in Section 2.1, the USB-C® connector provides power to the TSWDC155EVM and ADS9327EVM using the default configuration. Section 3.2.2 lists the ADS9327EVM GUI initialization instructions.

The TWDC155EVM is a high-power SuperSpeed (USB 3.0) device, which means a PC can supply up to 900mA from a compliant USB 3.0 port. However, the actual power available from a PC's USB port is often lower than 900mA, due to the unit load handshake process and the presence of 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, switch to an externally powered ADS9327EVM 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 ADS9327EVM, move the jumper on J6 to the [2:3] position and use the J5 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 device enumeration issues and are not recommended when communicating through the TSWDC155EVM.