RE: [SI-LIST] : LICA capacitors

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From: Omar Al-Taher (omart@avxus.com)
Date: Thu Nov 16 2000 - 13:01:50 PST


Actually we have a product that's in between the reverse geometry and the
LICA, it's the IDC (Interdigitated capacitor,) it has an inductance value
between the other two.
ESL:
0612: 550pH
0612 IDC: 175pH
0508: 510pH
0508 IDC: 110pH
LICA: 50pH

The IDC is actually one capacitor with eight stripes (it looks like a cap
array) the way the termination is set up cuts down on Inductance.

Just some clarification..........

Regards,

Omar Al Taher
Applications Engineer
AVX Corporation
801 17th Ave S.
Myrtle Beach, SC 29578
Tel: (843) 444-2811
Fax: (843) 626-3015
Email: omart@avxus.com
www.avxcorp.com

-----Original Message-----
From: owner-si-list@silab.eng.sun.com
[mailto:owner-si-list@silab.eng.sun.com]On Behalf Of Mike Hughes
Sent: Thursday, November 16, 2000 3:31 PM
To: 'si-list@silab.eng.sun.com'
Subject: Re: [SI-LIST] : LICA capacitors

I had some LICA samples from AVX but I never used them. The distributor was
not
willing to sell the small quantities that I needed.

To me, the drawback is the array footprint (which is how they get low
inductance). If you put this footprint on a board, you will never be able to
substitute a regular cap in it's place (if you can't get the LICA's when you
need them).

A good compromise is the reverse aspect ratio caps, 0508, 0612, etc. They
have
lower inductance and you would be able to substitute regular chip caps if
you
need to. For example the inductance of an 0508 is lower than a 0805 but not
as
low as a LICA.

"Greim, Michael" wrote:
>
> Aren't these the caps that while having alot
> of promise also have the virtue of being made
> of both unavailium and unafordium.
>
> obligatory 8-)
>
> MG
>
> -----Original Message-----
> From: Yuan Li [mailto:YSLI@altera.com]
> Sent: Thursday, November 16, 2000 1:43 PM
> To: 'si-list@silab.eng.sun.com'
> Subject: [SI-LIST] : LICA capacitors
>
> Hello,
>
> Has anyone known or used LICA capacitors? LICA = Low Inductance
Capacitors.
> I would appreciate any info on this.
>
> Thanks,
>
> Yuan

--
================================
Mike Hughes
Product/Test Engineer
Analog Devices, Inc.
Phone 781-937-2370
Fax 781-937-1011
================================

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