Programmable Devices
CPLDs, FPGAs, SoC FPGAs, Configuration, and Transceivers
20707 Discussions

Any Low Inductance Cap recommendations?

Altera_Forum
Honored Contributor II
‎05-31-2007 11:46 PM
1,139 Views

I am about to go to layout with a board using the first low inductance cap for bypass. I'm using an X2Y cap. Anyone else have other experience/recommendations?

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Altera_Forum
Honored Contributor II
‎06-05-2007 07:50 AM
425 Views

A long time friend of mine does some consulting for them. 

 

I highly trust his and their ability to understand ths issue with bypass cap needs for FPGA's. 

 

http://www.x2y.com/news.htm 

 

04/03/2006 - Power Integrity Expert Steve Weir Wins Best Paper Award
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Altera_Forum
Honored Contributor II
‎06-11-2007 07:48 PM
425 Views

The inductance comes from the size. each mm length gives a nH. Thus the 0603 size is my preferred size. I tend to use 10u (1206) in the vicinity and a bunch 100n (0603) close to the chip. I admit to consider even smaller (0402..0201) ones beyond my capabilities.  

 

Rene
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