voltage references drift

M

mw158979

Guest
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
 
"Kevin McMurtrie" <mcmurtri@dslextreme.com> schrieb
Some semiconductor manufacturers include graphs for specification
derating over time. Everything drifts for one reason or another.
Better add a potentiometer if that matters.

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.
Click to expand...
No, I think they all are about accuracy drift, not related to
temperature. Trimpot won't help for coefficiency exceeded.

thx
 
scroll to number 15

http://www.analog.com/en/content/0,2886,760%5F%5F87112,00.html?ref=ASC444


Mark


"mw158979" <e@tam.pl> wrote in message
news:g20nm4$g1s$1@atlantis.news.neostrada.pl...
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
Click to expand...
 
In article <g20nm4$g1s$1@atlantis.news.neostrada.pl>,
"mw158979" <e@tam.pl> 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
Click to expand...
Some semiconductor manufacturers include graphs for specification
derating over time. Everything drifts for one reason or another.
Better add a potentiometer if that matters.

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.

--
Block Google's spam and enjoy Usenet again.
Reply with Google and I won't hear from you.
 
On Mon, 02 Jun 2008 22:00:55 -0700, the renowned Kevin McMurtrie
<mcmurtri@dslextreme.com> wrote:

In article <g20nm4$g1s$1@atlantis.news.neostrada.pl>,
"mw158979" <e@tam.pl> 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.
Click to expand...
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.
Click to expand...



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
In article <g23cbs$ng7$1@nemesis.news.neostrada.pl>,
"mw158979" <e@tam.pl> wrote:

"Kevin McMurtrie" <mcmurtri@dslextreme.com> schrieb
Some semiconductor manufacturers include graphs for specification
derating over time. Everything drifts for one reason or another.
Better add a potentiometer if that matters.

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.

No, I think they all are about accuracy drift, not related to
temperature. Trimpot won't help for coefficiency exceeded.

thx
Click to expand...
Temperature usually makes a big difference in aging rates.

--
Block Google's spam and enjoy Usenet again.
Reply with Google and I won't hear from you.
 
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