SBAU416B November   2022  – January 2024 ADS9813

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Overview
    1. 1.1 ADS9813EVM and ADS9817EVM Features
  5. 2ADS9813EVM and ADS9817EVM Quick Start Guide
  6. 3Analog Interface
    1. 3.1 ADC Input SMA Connections
    2. 3.2 Voltage Reference
  7. 4Digital Interface and Clock Inputs
    1. 4.1 Digital Interface Connections
    2. 4.2 Clock Select
  8. 5Power Supplies
    1. 5.1 USB Power and When to Power the Board Externally
  9. 6ADS9813EVM and ADS9817EVM Software Reference
    1. 6.1 ADS9813EVM-GUI and ADS9817EVM-GUI Software Installation
    2. 6.2 USB Driver Installation
    3. 6.3 Using the CONFIG Tab
    4. 6.4 Using the Capture Tab
    5. 6.5 Using the INL/DNL Tool
    6. 6.6 Using the Histogram Tab
  10. 7Schematics, Layouts, and Bill of Materials
    1. 7.1 Schematics
      1. 7.1.1 ADS9813EVM Schematics
      2. 7.1.2 ADS9817EVM Schematics
    2. 7.2 Layout
    3. 7.3 Bill of Materials (BOM)
      1. 7.3.1 ADS9813EVM Bill of Materials (BOM)
      2. 7.3.2 ADS9817EVM Bill of Materials (BOM)
  11. 8Revision History

3.2 Voltage Reference

The ADS9813 and ADS9817 both use an internal 4.096-V reference voltage, which can be measured on the REFIO pin when configured as an output (default). For applications which require improved drift performance, configure the REFIO pin as an input and apply an external reference voltage to the pin.

The ADS9813EVM and ADS9817EVM include a provision for evaluating the REF7040 reference IC. The REF70xx family of high precision series voltage references offers the industry’s lowest noise (0.23 ppmp-p), very low temperature drift coefficient (2 ppm/°C), and high accuracy (±0.025%). In addition, these precision reference devices feature high PSRR, low drop-out voltage and excellent load and line regulation to help meet strict transient requirements. The REF7040 on the EVM is the 4.096-V output voltage option. To connect the REF7040 to the ADS9813 or the ADS9817, configure the REFIO pin as an input via the GUI and then install a shunt on jumper J30.

GUID-20230523-SS0I-BVDH-QVPT-0WCDD8WRCXRV-low.svgFigure 3-2 REF7040