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ADM3054 1MHz Emission fails

Question asked by medmshk on Nov 5, 2017
Latest reply on Nov 12, 2017 by medmshk

Dear Sir,

ADM3054 1MHz Emission fails

We are using ADM3054 for Can isolation transiver.

From Our EMC emission test , we can see every 1MHz noise (which over some limit line on 100MHz)


After some investigation , we have find ADM3054 make this noise.

- With Near field probe , ADM3054 make 1Mhz noise
- Check LISN and 5V line of ADM3054 VDD2, we find it as attaced.


I am not familiar with  the internal architecture of ADM3054.
Why AMD3054 make this noise?
From ADM3054 datasheets, It's seem there is no active switching components on ADM3054.

I hope your helps.


Best Regards,
 Connect LISN to 5V(VDD2 on ADM3054)