SLAU298A November   2009  – May 2021

 

  1.   Trademarks
  2. 1ADS8555EVM-PDK Overview
    1. 1.1 ADS8555EVM-PDK Features
    2. 1.2 ADS8555EVM Features
  3. 2EVM Analog Interface
    1. 2.1 ADC Supply, Input, Voltage Reference, and Digital Connections
    2. 2.2 ADC Amplifier Drive
  4. 3Digital Interface
    1. 3.1 Parallel Interface
    2. 3.2 Serial Interface (SPI)
    3. 3.3 I2C Bus and EEPROM
    4. 3.4 Connections to the PHI Connector
  5. 4Power Supplies
    1. 4.1 External Power Connections and Test Points
    2. 4.2 Low-Dropout Regulator (TPS7A3001 for HVSS)
    3. 4.3 Low-Dropout Regulator (TPS7A4700 for AVDD, HVDD)
  6. 5Installing the ADS8555EVM Software
  7. 6ADS8555EVM Operation
    1. 6.1 Connecting the Hardware and Running the GUI
    2. 6.2 Jumper Settings for the ADS8555EVM
    3. 6.3 Modifying Hardware and Using Software to Evaluate Other Devices in the Family
    4. 6.4 EVM GUI Global Settings for ADC Control and Registers
    5. 6.5 Time Domain Display
    6. 6.6 Frequency Domain Display
    7. 6.7 Histogram Display
  8. 7Bill of Materials, Layout, and Schematics
    1. 7.1 Bill of Materials
    2. 7.2 Board Layout
    3. 7.3 Schematics
  9. 8Revision History

6.6 Frequency Domain Display

The spectral analysis tool, shown in Figure 6-7, is intended to evaluate the dynamic performance (SNR, THD, SFDR, SINAD, and ENOB) of the ADS8555 ADC through single-tone sinusoidal signal fast Fourier transform (FFT) analysis using the 7-term Blackman-Harris window setting. The FFT tool includes windowing options that are required to mitigate the effects of noncoherent sampling (this discussion is beyond the scope of this document). The 7-term Blackman-Harris window is the default option and has sufficient dynamic range to resolve the frequency components of up to a 24-bit ADC. The None option corresponds to not using a window (or using a rectangular window) and is not recommended.

GUID-20210426-CA0I-VWTL-3FBJ-KVM2VQKLNCKG-low.gif Figure 6-7 Frequency Domain Display