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Design >> Analog Design >> what happens at low temp
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Message started by psdjonly on Mar 13^th, 2014, 11:32am

Title: what happens at low temp
Post by psdjonly on Mar 13^th, 2014, 11:32am

Hi All,

We usually care about how high the ambient or die temp is, sometimes we choose 85C or 150C as our datasheet max temp.
At high temp, data stored in the memory could be lost, modeling can be not accurate, leakage goes high...

And here comes the question, what could go wrong at very low temp so that we usually want to limit it to be -40C.
What in the manufacturing process can allow us to go lower than that?

Title: Re: what happens at low temp
Post by AnalogDE on Mar 13^th, 2014, 4:37pm

If you're working with memories your worst performance can occur at the temperature extremes -- memory cell characteristics usually have some sort of tempco, hence the spec limits on temperature.

Logic could also have issue at cold... If the logic gates speed up too much you run into hold timing violations.

Title: Re: what happens at low temp
Post by loose-electron on Mar 18^th, 2014, 4:21am

Considerations for operation of CMOS integrated circuits outside their cataloged temperature
Designing for Extreme Temperatures
Low Temperature Effects on CMOS Circuits