[SI-LIST] AW: Effect of temperature on at 200C for DDR3/4 boards
- From: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 16 Dec 2009 15:48:54 +0100
Hi Barthi,
Your question is how the characteristic impedance of the PCB is affected by
high temperatures (100°C)?
The Temperature shouldn't have a big influence on impedance. The series
resistance will increase, but the result will just be higher losses. The board
sice will increase with temperature, but each differential pair will just see
fractions of this extra size, in my eyes not enough to worry about impedance
changes.
I don't think you have to worry about temperature related impedance changes on
regular PCB at all, but I can't proof that with simulations or measurements.
BR
Gert
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-----Ursprüngliche Nachricht-----
Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
Auftrag von Barthi das
Gesendet: Mittwoch, 16. Dezember 2009 12:57
An: si-list@xxxxxxxxxxxxx
Betreff: [SI-LIST] Effect of temperature on at 200C for DDR3/4 boards
Hi,
What is the effect of temperature (200C) on characteristic impedance at DDR3/4
speeds and what the best way to control the impedance because of the temp
effect? Appreciate if anyone sends the literature related to the topic
Thanks
Barthi
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