[sdiy] X7R, Y5V, Z5U characteristics

Richie Burnett rburnett at richieburnett.co.uk
Tue Nov 24 21:49:17 CET 2015


Yes, C0G/NP0 caps are much better behaved. Ideal for timing circuits, tuned circuits, etc. Lower microphony too, but they have lower CV density.

-Richie,


---- Mattias Rickardsson wrote ----

>Great little applet there, thanks!
>Yes, X7R and similar caps are quite terrible in many ways when you
>expect more or less ideal components. But C0G seem great, a totally
>different thing. Has anyone had any problems worth mentioning using
>C0G instead of precision film caps for timing purposes? I use them in
>filters, oscillators... and there was much rejoicing.
>
>/mr
>
>
>On 23 November 2015 at 22:46, Richie Burnett
><rburnett at richieburnett.co.uk> wrote:
>> The terrible voltage-coefficient and temperature-coefficient of modern
>> miniature high-k ceramic capacitors has been mentioned on this list many
>> times already.  However I just found a neat online web application (nothing
>> to install) that generates graphs showing how different size/dielectric
>> Murata capacitors behave over varying conditions: DC bias, AC voltage,
>> temperature, etc...
>>
>> http://ds.murata.co.jp/software/simsurfing/en-us/index.html
>>
>> I had never realised quite how "non-ideal" an 0603 size 4.7uF capacitor is
>> until I saw the graphs for myself.  It doesn't make pretty viewing!
>>
>> -Richie,
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