SBAU230C August   2014  – March 2021 ADS8688

 

  1. 1 Trademarks
  2. 2 ADS8688EVM-PDK Overview
  3. 3 EVM Analog Interface
    1. 3.1 ADC Analog Input Connections and Filter
    2. 3.2 Voltage Reference, Aux Input, and Supply Decoupling
  4. 4 Digital Interface
    1. 4.1 Serial Interface (SPI)
    2. 4.2 I2C Bus for Onboard EEPROM
  5. 5 Power Supplies
  6. 6 ADS8688 Initial Setup
    1. 6.1 Software Installation
  7. 7 EVM Operation
    1. 7.1 Connecting the Hardware
    2. 7.2 Modifying Hardware and Using Software to Evaluate Other Devices in the Family
    3. 7.3 EVM GUI Global Settings for ADC Control
    4. 7.4 Time Domain Display
    5. 7.5 Frequency Domain Display
    6. 7.6 Histogram Display
  8. 8 Bill of Materials, Schematics, and Layout
    1. 8.1 Bill of Materials
    2. 8.2 Board Layout
    3. 8.3 Schematic
  9. 10Revision History

2 ADS8688EVM-PDK Overview

Table 1-1 lists the related documents that are available for download from Texas Instruments at

ADS8688EVM Features

  • Hardware and software required for diagnostic testing as well as accurate performance evaluation of the ADS8688 ADC
  • USB powered—no external power supply is required
  • The PHI controller that provides a convenient communication interface to the ADS8688 ADC over USB 2.0 (or higher) for power delivery as well as digital input and output
  • Easy-to-use evaluation software for 64-bit Microsoft Windows™7, Windows 8, and Windows 10 operating systems
  • The software suite includes graphical tools for data capture, histogram analysis, and spectral analysis. This suite also has a provision for exporting data to a text file for post-processing. Fig
  • Integrated 4.096-V voltage reference.
  • Bipolar (±10.24 V, ±5,12 V, ±2.56 V ) or unipolar (0 V to 10.24 V, 0 V to 5.12 V) input ranges for each channel.
  • Onboard, second-order, Butterworth, low-pass filters for four channels.
  • Onboard regulator for generating a ±15-V bipolar supply for second-order, Butterworth, low-pass filters.
  • Capable of accepting a ±100-mV signal on the negative analog inputs (AIN_xGND).
GUID-6DE7D031-F916-452C-A92E-13D7C6566F66-low.gif Figure 2-1 System Connection for Evaluation

ADS8688EVM Features:

  • Eight input channels connected to external single ended signals source applied to SMA connectors or header
  • Serial interface connects to the PHI controller via 60 pin connector (J3).
  • Serial interface connects to the PHI controller via 60 pin connector (J2).
  • All power for device from USB via PHI controller.
  • Onboard ultra-low noise low-dropout (LDO) regulator generates 5.0V AVDD supply. Input to LDO from PHI controller.
  • DVDD (3.3V) powered by PHI controller.