SDAA401 June   2026 ISOW1050 , ISOW3080 , ISOW6441

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Enhancing EMC Performance Through Board Design Techniques
    1. 2.1  HF Decoupling Capacitor on Pin 1 and Pin 16
    2. 2.2  Capacitor Bank and Relative Placement
    3. 2.3  Ferrite Bead π-Filter on Supply Rails
    4. 2.4  Isolated Copper Island (KOZ) Under Ferrite Beads
    5. 2.5  Common-Mode Choke on the CAN/RS-485 Cable (ISOW3080 and ISOW1050 Device)
    6. 2.6  Post Island Capacitor
    7. 2.7  Series Resistors or Low-Pass Filter on I/O Traces
    8. 2.8  Y-Capacitor Between GND1 and GND2 (Safety-Critical)
    9. 2.9  Interlayer Capacitor (Substrate Capacitor in the Isolation Region)
    10. 2.10 100µF Bulk Capacitor at VDD Input Rail
  6. 3Summary
  7. 4References
Application Note

Optimizing EMC in Isolated Designs: 10 PCB Techniques for CISPR and IEC Compliance