SBAA548A April   2022  – May 2022 ADS8588S , ADS8681 , ADS8686S , ADS8688 , ADS8688A

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Circuit Design and Test System
    1. 2.1 Design Description
      1. 2.1.1 Input Protection
      2. 2.1.2 Power Supply Design and Protection
      3. 2.1.3 Digital Isolation Design
      4. 2.1.4 Component Selection and Layout Considerations
    2. 2.2 Test System
      1. 2.2.1 Reference
    3. 2.3 Standards and Test Criteria
  5. 3Test Details and Results
    1. 3.1 Electrical Fast Transients (EFT)
    2. 3.2 Electrostatic Discharge (ESD)
    3. 3.3 Surge Immunity (SI)
    4. 3.4 Conducted Immunity (CI)
    5. 3.5 Radiated Immunity (RI)
    6. 3.6 Radiated Emissions (RE)
      1.      20
  6. 4Schematics
  7. 5PCB Layouts
  8. 6Bill of Materials
  9. 7Acknowledgments
  10. 8References
  11. 9Revision History

2.2 Test System

Figure 2-3 shows the general setup of the ADS8686S EMC test board for EMC testing. A software script is developed to configure the running parameters on a laptop, such as serial peripheral interface (SPI), clock frequency configuration, ADC mode selection, data capture and analysis, data monitoring and exporting for post-processing. In each EMC test, the data is captured by the software and the PHI controller to verify the test system and the equipment under test (EUT) before the EMC event. The data is continuously monitored during the EMC test, and the data is captured to check the EUT functionality after the EMC test.

The PHI controller card provides a necessary communication interface between the ADS8686S EMC test board and the laptop over a USB 2.0 (or higher) interface for digital input and output. An optical transceiver pair (bit-driver) is used between the laptop and the PHI controller card to isolate the harsh transient signals and test environment and provide an additional layer of protection for the user equipment.