[SI-LIST] Ceramic Vs Tantalum for bulk bypassing
- From: Joel Brown <joel@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 21 Apr 2006 09:53:29 -0700
Which is better for bulk bypassing, ceramic or tantalum?
Ceramic can be used up to rated voltage, tantalum needs 50% voltage
derating.
Ceramic has lower ESR which reduces noise due to surge currents, but the
higher ESR of tantalum capacitors could damp ringing which reduces
noise. Tantalum capacitors are less likely to crack under stress.
Tantalum when used with lower value ceramics (.1uf) might be just as
effective as all ceramic.
Any other thoughts on this?
Thanks - Joel
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