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

2.2 ADC Amplifier Drive

Figure 2-2 shows the op amp configuration for each ADC drive input. The default configuration is and inverting configuration. This can be converted to a non-inverting configuration but uninstalling R6, and R14, and installing R11. Also, R11 and C11 can be used to create a low pass filter. The jumper JP1 can be used to completely bypass the amplifier. This diagram only shows one channel but this circuit is repeated 8 times. For other channels, see Section A.

GUID-20200707-SS0I-SVTN-F8Q4-KWVWCH15ZHLC-low.gif Figure 2-2 Amplifier Drive Circuit