This is just my interest but please let us know.
How did ADuM5020 reduce EMC?
Does this device use same architecture inductor as ADuM141?
The ADuM5020 reduced emissions below CISPR22 Class B levels by:
1. Improved coil design and circuit.
2. Spectrum techniques to reduce the quasi-peak level
3. Small inexpensive ferrite beads are used to block the high frequency common-mode currents on the secondary supply connections in order to reduce the dipole emissions further.
There are some similarities in ADuM5020 coil design and spectrum techniques to the ADuM141.
I understood what you said.
Thank you very much.