I'm working on some device with isolated RS485 based on ADM2587E transceiver with integrated high frequency isolated DC/DC converter.
This IC is a bit tricky if you need low EMI, because DC/DC converter makes high frequency noise.
My previous design was based of this evaluation board:
I have used same components and device passed EMC tests.
Since tantalum capacitors are "very bad" (conflict material), like many others I want to get rid of them.
Can I just replace tantalum caps (C2, C10) with good quality X7R and expect similar (maybe even better) results in EMI emission?
I know that X7R MLCC has waaay lower ESR and I guess that these tantalum caps on eval board are tank capacitors (not important at high frequency range).