Capacitor Array?

Hammy

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Nov 23, 2009, 11:43:13 AM11/23/09

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When they specify a capacitance for say a 4 element array of 56pF
does this mean there are four 56pf caps or the total capacitance of
the array is 56pf?

Dirk Bruere at NeoPax

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Nov 23, 2009, 11:44:26 AM11/23/09

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What's the context?

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
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Hammy

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Nov 23, 2009, 11:54:57 AM11/23/09

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On Mon, 23 Nov 2009 16:44:26 +0000, Dirk Bruere at NeoPax
<dirk....@gmail.com> wrote:

>Hammy wrote:
>> When they specify a capacitance for say a 4 element array of 56pF
>> does this mean there are four 56pf caps or the total capacitance of
>> the array is 56pf?
>
>What's the context?

I'm placing an order at dig key some of which is for an elliptic LPF.

I would like to use the arrays to make up the capacitors in the
filter. The data sheets I've been looking at Digikey don't state if
it's total array capacitance or each elements capacitance.

I'm searching under capacitor arrays at Digikey.Here is an example TDK
data sheet.

http://www.tdk.co.jp/tefe02/e4182_ckc.pdf

I've alaways assumed it was specified for each element now I'm not
sure.

Hammy

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Nov 23, 2009, 11:58:03 AM11/23/09

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Forgot here is where I'm searching

http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=capacitor&stock=1

Under Capacitors ---> Arrays

christofire

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Nov 23, 2009, 2:51:17 PM11/23/09

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"Hammy" <sp...@spam.com> wrote in message
news:hhflg5lusgn13deqr...@4ax.com...

It is amusing that in the above TDK data sheet, and the Panasoinc one at
http://industrial.panasonic.com/www-data/pdf/AEH0000/AEH0000CE4.pdf they
manage to avoid actually stating that the capacitance value is for each
individual capacitor, but this does follow from the performance of the
'measurement circuit' in the Panasonic note. It's also rather likely in the
case of the TDK part - in fact, much more likely than the given value being
the sum of the individual values.

Why not ask Digikey?

Chris

Hammy

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Nov 23, 2009, 4:37:37 PM11/23/09

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On Mon, 23 Nov 2009 19:51:17 -0000, "christofire"
<chris...@btinternet.com> wrote:

>
>It is amusing that in the above TDK data sheet, and the Panasoinc one at
>http://industrial.panasonic.com/www-data/pdf/AEH0000/AEH0000CE4.pdf they
>manage to avoid actually stating that the capacitance value is for each
>individual capacitor, but this does follow from the performance of the
>'measurement circuit' in the Panasonic note. It's also rather likely in the
>case of the TDK part - in fact, much more likely than the given value being
>the sum of the individual values.
>
>Why not ask Digikey?
>
>Chris
>

I have some of these on hand 0.1uf 4 element array.

http://www.newark.com/taiyo-yuden/e4k212b7104kd-t/ceramic-capacitor-array/dp/08P5136?Ntt=08P5136

I soldered one into a blank PCB and measured 428nf. So it is 4
elements times the specified value.

mi...@sushi.com

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Nov 23, 2009, 11:47:35 PM11/23/09

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On Nov 23, 8:54 am, Hammy <s...@spam.com> wrote:
> On Mon, 23 Nov 2009 16:44:26 +0000, Dirk Bruere at NeoPax
>

I don't see any advantage to using the array. I can see a disadvantage
in that you may need longer leads to hook up the caps.

Uwe Hercksen

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Nov 24, 2009, 6:47:05 AM11/24/09

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Hammy schrieb:

> When they specify a capacitance for say a 4 element array of 56pF
> does this mean there are four 56pf caps or the total capacitance of
> the array is 56pf?

Hello,

for resistor arrays they usually specify the value of each single
resistor, especially if those are independent resistors not connected
together.

Bye