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Why to put clock splitters e.g. ADCLK948 on ceramic substrates

Question asked by davidbr on Nov 25, 2014
Latest reply on Nov 26, 2014 by pkern

I obtained the demo board of the ADCLK948 clock splitter and  noticed that the board is made of a ceramic substrate.

What is the reason not to use FR4 in this case, is it RF loss, thermal or the mechanical (vibration) consideration that necessitates such a substrate?

What would be the deteriorations induced by a cheap board dielectric?

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