SBAU193E June   2011  – May 2021 ADS8568

 

  1.   Trademarks
  2. 1EVM Overview
    1. 1.1 ADS8568EVM-PDK Kit Features
    2. 1.2 ADS8568EVM Board Features
    3. 1.3 Related Documentation From Texas Instruments
  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 Connections to PHI connector
    4. 3.4 Static Signals for ADS8568
    5. 3.5 I2C Bus for Onboard EEPROM
  5. 4Power Supplies
    1. 4.1 Low Dropout Regulator
    2. 4.2 Power Connections and LED Indicators
  6. 5Installing ADS8568EVM Software
  7. 6ADS8568EVM Operation
    1. 6.1 Connecting the Hardware and Running the GUI
    2. 6.2 Jumper Settings for ADS8568EVM
    3. 6.3 EVM GUI Global Settings for ADC Control
    4. 6.4 Time Domain Display
    5. 6.5 Frequency Domain Display
    6. 6.6 Histogram Display
  8. 7Modifying Hardware and Using Software to Evaluate ADS8548 and ADS8528
  9.   A Bill of Materials, Layout, and Schematic
    1.     A.1 Bill of Materials
    2.     A.2 Layout
    3.     A.3 Schematic
  10.   B Revision History

6.6 Histogram Display

Noise degrades ADC resolution and the histogram tool can be used to estimate effective resolution, which is an indicator of the number of bits of ADC resolution losses resulting from noise generated by the various sources connected to the ADC when measuring a DC signal. The cumulative effect of noise coupling to the ADC output from sources such as the input drive circuits, the reference drive circuit, the ADC power supply, and the ADC itself is reflected in the standard deviation of the ADC output code histogram that is obtained by performing multiple conversions of a DC input applied to a given channel. As shown in Figure 6-6, the histogram corresponding to a DC input is displayed on clicking the Capture button.

GUID-20200707-SS0I-WPMX-K6HM-CZSTX7XPWMKK-low.gif Figure 6-6 Histogram Display