Date: Mon Nov 08 1999 - 22:24:32 PST
Murata will go to full scale production in February 2000 and prices will go down
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To: "'firstname.lastname@example.org'" <email@example.com>
cc: "'Herr Hluscu'" <firstname.lastname@example.org> (bcc: Johnni
Subject: AW: [SI-LIST] : Comment on Johnson's article
results are very good, but costs and availybilty very poor!
I hope AVX will came up much faster with this coponents.
Trenew Electronic GmbH
Von: Rick Brooks[SMTP:email@example.com]
Gesendet: Samstag, 6. November 1999 03:48
Betreff: Re: [SI-LIST] : Comment on Johnson's article
Has anybody ever tried 0508 caps (not 0805) with multiple trace/vias to the
It seems like a better idea for low inductance, but I don't know about the cost
- Rick Brooks
At 04:59 PM 11/05/1999 -0800, you wrote:
>> Date: Fri, 05 Nov 1999 16:39:47 -0800
>> From: Howard Johnson <firstname.lastname@example.org>
>> If you want to achieve an even lower impedance, try smaller capacitors,
>> or go with some of the more advanced packages (for
>> example the new "IDT" package from AVX claims to
>> deliver an installed inductance of 0.1 nH per component.)
>> Best regards,
>> Dr. Howard Johnson
>Most of the inductance is not in the capacitor but is in the pads
>and vias to the power planes. Our studies show that the inductance
>in the capacitor itself is between .2 and .4 nH for 0805 capacitors,
>depending on the height. The mounting inductance usually ranges
>from 0.3 to 2 nH depending on the depth of the vias to the power
>planes and the spacing between vias.
>The cost of low inductance capacitors is not worth it unless you
>are going to commit substantial board area for multiple vias to
>the power planes and can tolerate the loss of wiring channels.
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