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X7R vs NP0/C0G Ceramic Caps
X7R vs NP0/C0G Ceramic Caps
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Old 6th March 2007, 06:46 PM   #1
speakerguy79 is offline speakerguy79  United States
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Default X7R vs NP0/C0G Ceramic Caps

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?
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Old 6th March 2007, 08:53 PM   #2
radtech is offline radtech  United States
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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
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Old 6th March 2007, 10:40 PM   #3
theAnonymous1 is offline theAnonymous1  United States
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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
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Old 7th March 2007, 12:11 AM   #4
BWRX is offline BWRX  United States
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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.
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Old 7th March 2007, 12:52 AM   #5
RetroAudio is offline RetroAudio  United States
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X7Rs have their place in digital circuits where NPOs can't fit.
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