SBAU315B July   2018  – March 2025 ADS9224R , ADS9234R

 

  1.   1
  2.   ADS9224REVM-PDK
  3.   Trademarks
  4. 1Overview
    1. 1.1 ADS9224REVM-PDK Features
    2. 1.2 ADS9224REVM Features
  5. 2Analog Interface
    1. 2.1 Connectors for Signal Source
    2. 2.2 ADC Differential Input Signal Driver
      1. 2.2.1 Input Signal Path
    3. 2.3 ADS9224R Internal Reference
  6. 3Digital Interfaces
    1. 3.1 multiSPI for ADC Digital IO
  7. 4Power Supplies
  8. 5Setup
    1. 5.1 Default Jumper Settings
    2. 5.2 EVM Graphical User Interface (GUI) Software Installation
  9. 6Operation
    1. 6.1 EVM GUI Global Settings for ADC Control
    2. 6.2 Register Map Configuration Tool
    3. 6.3 Time Domain Display Tool
    4. 6.4 Spectral Analysis Tool
    5. 6.5 Histogram Tool
  10. 7ADS9224REVM Bill of Materials, PCB Layout, and Schematics
    1. 7.1 Bill of Materials
    2. 7.2 PCB Layout
    3. 7.3 Schematics
  11. 8Revision History

2.2 ADC Differential Input Signal Driver

The analog inputs of the ADS9224R SAR ADC are not high-impedance but rather present a dynamic load as the sample-and-hold switches open and close. The current demand of the SAR ADC input increases as a function of the sampling rate. Thus, the evaluation board provides the THS4551 FDA driver that maintains ADC performance with maximum loading at the full device throughput of 3 MSPS.