X7R vs NP0/C0G Ceramic Caps

[speakerguy79]

Are X7R ceramic capacitors suitable as power supply bypass capacitors in audio ckts like op amp filters, or do I need to spend the much larger amount on NP0 types?

[radtech]

Here's a couple of links, read up and see if you think the X7Rs will do in your application.

http://en.wikipedia.org/wiki/NP0

http://en.wikipedia.org/wiki/X7R

[theAnonymous1]

NP0/C0G type is the better capacitor. They are more expensive and usually larger for the same value than X7R type.

TDK CAP CER 0.10UF 50V X7R 10% 0805 = $0.112

TDK CAP CER 0.10UF 50V C0G 5% 1210 = $3.30

[BWRX]

X7R ceramics are fine for bypassing. NP0 would be preferred in active filter circuitry. X7R ceramics have a dielectric with a higher relative dielectric constant which equates to more capacitance per unit volume.

[RetroAudio]

X7Rs have their place in digital circuits where NPOs can't fit.