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 Power Supplies

By default, the TSWDC155EVM provides the ADS9327EVM with a 3.3V supply (SPRW_SUP_3P3). The ADS9327EVM has a TPS61033 boost converter which increases the supply from 3.3V to 5.5V. The 5.5V supply applies to the input of three independent low-dropout regulators (LDOs) to provide the required analog and digital supplies for the ADS9327 when J6 is in the [1-2] position. The 5V output from the TPS7A2050 (U7) powers the AVDD 5V supply rail. U8 (TPS7A2018) outputs 1.8V for VDD_1V8 and IOVDD when R13 is populated (default). U10 (TPS7A2033) outputs 3.3V which is an optional source for the IOVDD supply, for this depopulate R13 and populate R14.

Configure the shunt on J6 in the [2-3] position and connect the external supply to terminal block J5 to change the LDO input voltage (LDO_IN) to an external source ranging from 5.2V to 5.5V. In this setup, U6 (LM66100) provides reverse polarity protection in the event that the connection is wired incorrectly.

Figure 2-5 shows the power tree schematic for the ADS9327EVM.

ADS9327EVM Power Entry and RegulatorsFigure 2-5 Power Entry and Regulators