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

2.2.1 Fully-Differential Circuit: THS4552

Figure 2-2 shows the schematic for the THS4552 input circuit connected to each ADC channel. The THS4552 is a dual-channel, low-noise, precision, 150MHz, fully differential amplifier. The THS4552 is configured for a gain of 1V/V and receives single-ended and differential inputs. By default, the THS4552 circuit is tuned for a fully-differential input signal with a 50Ω output impedance. For other input source impedances or differential inputs, remove or adjust the termination resistors from the FDA inputs accordingly. Additionaly the termination resistors can be shorted by using the jumper provided.

ADS9327EVM THS4541 Fully-Differential Circuit for ADC AFigure 2-2 THS4541 Fully-Differential Circuit for ADC A

The OPA320, shown in Figure 2-3, is used as the "VCMOUT" buffer to drive the output common-mode voltage on both ADC A and ADC B input circuits. Additional options for sourcing the common-mode voltage are available by populating R39 (default), R40, or R88.

ADS9327EVM OPA320 Circuit to Buffer the ADS9327 VCMOUT Voltage Figure 2-3 OPA320 Circuit to Buffer the ADS9327 VCMOUT Voltage