Re: [SI-LIST] : BGA socket modeling

Pat Zabinski (zabinski.patrick@mayo.edu)
Thu, 2 Sep 1999 06:30:34 -0500

Matt,

I went through a similar process about six months ago, and parasitics
varied greatly between the various vendors. For example, we measured
one socket with self inductance of 1 nH and a different socket at 7 nH.
Similar variations were found in C and R.

In addition, when we asked most (not all) vendors for models, they
rattled off numbers from a generic sheet that covered all sockets,
regardless of pin-pitch. I don't recall finding any socket vendor
that had mutual parasitics either.

In other words, I agree with the others in trying to develop your
own models. There are several methods; you'll have to determine
the best approach based on your resources.

Pat

> Hi,
>
> anyone have any approximate figures for BGA test socket LRC values
> or how to model it.
>
> I am trying to get info from the socket vendor, but all I seem
> to be able to get is contact resistance and mechanical info.
>
> matt

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