Capacitance versus voltage for X7S caps?
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From: Ken on 25 Mar 2010 02:03 On Wed, 24 Mar 2010 16:22:59 -0700, Joerg <invalid(a)invalid.invalid> wrote: > Tried the major mfgs and the typical datasheet looks like this: > > http://www.avx.com/docs/Catalogs/cx7s.pdf > > Quote "Capacitance for X7S varies under the influence of electrical > operating conditions such as voltage and frequency." http://web.archive.org/web/20070206080241/http://members.aol.com/sbench102/cap.html http://web.archive.org/web/20070912104727/http://members.aol.com/sbench102/caps.html http://web.archive.org/web/20080203162906/http://members.aol.com/sbench102/caps1.html http://web.archive.org/web/20071107034022/http://members.aol.com/sbench102/caps2.html
From: Robert Baer on 25 Mar 2010 17:27 Joerg wrote: > Tried the major mfgs and the typical datasheet looks like this: > > http://www.avx.com/docs/Catalogs/cx7s.pdf > > Quote "Capacitance for X7S varies under the influence of electrical > operating conditions such as voltage and frequency." > > Then under diagrams ... nada, zip, zilch. Great. > > One paper listed X7S with the same voltage coefficient as X7R but that > doesn't sound right. Anyone have a link to some hard data, with a graph > in there and preferably no marketing hype? > I know that the rating system of ceramic capacitors allow "X7S" but i have never seen (anything)(anything)S even sold... So why the question?
From: Muzaffer Kal on 25 Mar 2010 04:48 On Thu, 25 Mar 2010 13:27:48 -0800, Robert Baer <robertbaer(a)localnet.com> wrote: >Joerg wrote: >> Tried the major mfgs and the typical datasheet looks like this: >> >> http://www.avx.com/docs/Catalogs/cx7s.pdf >> >> Quote "Capacitance for X7S varies under the influence of electrical >> operating conditions such as voltage and frequency." >> >> Then under diagrams ... nada, zip, zilch. Great. >> >> One paper listed X7S with the same voltage coefficient as X7R but that >> doesn't sound right. Anyone have a link to some hard data, with a graph >> in there and preferably no marketing hype? >> > I know that the rating system of ceramic capacitors allow "X7S" but i >have never seen (anything)(anything)S even sold... > So why the question? Digikey has 244 items listed in stock with X5S, X6S, X7S and Y5S temperature coefficients.
From: Joerg on 25 Mar 2010 11:00 Ken wrote: > On Wed, 24 Mar 2010 16:22:59 -0700, Joerg <invalid(a)invalid.invalid> > wrote: > >> Tried the major mfgs and the typical datasheet looks like this: >> >> http://www.avx.com/docs/Catalogs/cx7s.pdf >> >> Quote "Capacitance for X7S varies under the influence of electrical >> operating conditions such as voltage and frequency." > > > http://web.archive.org/web/20070206080241/http://members.aol.com/sbench102/cap.html > http://web.archive.org/web/20070912104727/http://members.aol.com/sbench102/caps.html > http://web.archive.org/web/20080203162906/http://members.aol.com/sbench102/caps1.html > http://web.archive.org/web/20071107034022/http://members.aol.com/sbench102/caps2.html > Well, I know what Z5U does. But it doesn't tell me what X7S does :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Joerg on 25 Mar 2010 11:02
Robert Baer wrote: > Joerg wrote: >> Tried the major mfgs and the typical datasheet looks like this: >> >> http://www.avx.com/docs/Catalogs/cx7s.pdf >> >> Quote "Capacitance for X7S varies under the influence of electrical >> operating conditions such as voltage and frequency." >> >> Then under diagrams ... nada, zip, zilch. Great. >> >> One paper listed X7S with the same voltage coefficient as X7R but that >> doesn't sound right. Anyone have a link to some hard data, with a >> graph in there and preferably no marketing hype? >> > I know that the rating system of ceramic capacitors allow "X7S" but i > have never seen (anything)(anything)S even sold... > So why the question? Because distributors sell them and I'd like to use this one: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=445-5211-2-ND -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |