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ADuM315x PCB- Layout

Question asked by intec on Feb 9, 2018
Latest reply on Feb 20, 2018 by jnaso

Hello everybody,


we are using ADU315x familiy devices for SPI isolation. Eveything works right but we want to improve EMI behaviour.

We already looked through the application notes AN-1109 and AN-0971 dealing with other types of iCouplers and isoPower and realized PCB stitching capacitor which works great to mitigate emissions.

But when looking through AD315x's datasheet I did not see any reference to those documents.


So my question is: Do you also recommend those techniques for AD315x series or is that not suitable for these parts? If I take a close look at the switching frequencies using a spectrum analyser I recognize switching frequencies and multiples of that up to more or less 100MHz.


Thanks in advance