Re: voltage references drift
- From: Spehro Pefhany <speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 03 Jun 2008 08:40:33 -0400
On Mon, 02 Jun 2008 22:00:55 -0700, the renowned Kevin McMurtrie
<mcmurtri@xxxxxxxxxxxxxx> wrote:
In article <g20nm4$g1s$1@xxxxxxxxxxxxxxxxxxxxxxxxxx>,
"mw158979" <e@xxxxxx> wrote:
Hello,
Voltage references has usually specified a parameter
'temperature drift limit', e.g. 10ppm per Celsius degree.
What about long term issues related to this drift?
Can the drift go above that limit after years? If so,
how long period can I expect with drift as specified?
TIA
Some semiconductor manufacturers include graphs for specification
derating over time. Everything drifts for one reason or another.
Better add a potentiometer if that matters.
Stating the obvious perhaps, but a pot will generally do nothing
positive for stability. A digital correction is often preferable.
This one has a chart:
http://www.thaler.com/thcpdf/TI_article.pdf
It would be better if showed aging for different temperatures. There
can be a big difference in aging for 25C versus 100C.
Best regards,
Spehro Pefhany
--
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- Re: voltage references drift
- From: Kevin McMurtrie
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