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Doug Grant

The Ultimate Question of Analog Circuit Design

Doug Grant
Brad Albing
Brad Albing
3/28/2013 2:27:24 PM
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Blogger
Re: Temperature is a great stress tool
The temp-testing is a physical way to do a form of a senstivity study - tweak individual component values across their range of likely values and see what effect that has on circuit operation.

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amrutah
amrutah
2/16/2013 1:28:48 PM
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Master
reliability can be assessed by temperature
Victoria was right on her stress upon the temperature.  Even though the process is trimmed out, if the device remains ON say even for few hours then the bias would change and can cause short term failures.

   HTOL (High Temperature Operating Life, performed to determine the reliability of devices under operation at high temperature conditions over an extended period of time) is one test that is a must for devices in 90nm or less technology nodes. 

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WKetel
WKetel
1/31/2013 10:35:36 AM
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Artist
Re: Temperature is a great stress tool
The question about working at various temperatures is certainly vital, not only due to the fact of varying ambient temperatures, but also because of internal device heating, which can be quite a trap for some unsuspecting designer trying to utilize the new part. A prime example of that problem is all of the very cheap controls using 4000 series CMOS and depending on the trigger threshold voltage being at some specific level for correct operation. 

So Rose certainly did have the question correct.

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eafpres1
eafpres1
1/29/2013 7:34:59 PM
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Blogger
Temperature is a great stress tool
You Violet was pretty smart.  In some phases of my engineering career, I really wanted to use HALT/HASS or some variation of it, but rarely got to do it.  It was clear that adding thermal stress can reveal all kinds of weaknesses, in many kinds of products.

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Clyde
Clyde
1/29/2013 1:20:35 PM
User Rank
Newbie
The ultimate question
Over temperature and an extension is the 5 word question:

Have you worst cased it?

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