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Andy Neil
11/30/12 11:24
Read: 500 times
Basingstoke
Uk


 
#188927 - Tell me about it!
Responding to: Richard Erlacher's previous message
Richard Erlacher said:
Failure modes under out-of-spec conditions have to be identified and characterized. You have to be able to predict what will happen when the device is "abused" in the sense that its environment/power supply/etc. are outside the specified limits. It's difficult and costly, and, in fact, difficult to identify which effects are due to which failure modes.


I've just spent the best part of a year working in a major semiconductor manufacturer doing just this kind of characterisation on new silicon.

A test "sweeping" whole sets of parameters over all cominations over all their ranges could take days or weeks per chip - and then analysing all the resulting data was another mamoth task!

It would be "nice" if, whenever such limitations are exceeded, the device simply stopped, but that's seldom what happens.


Indeed!

List of 27 messages in thread
TopicAuthorDate
-40 degree Celsius operation      Raj Nambiar      11/24/12 03:45      
   Heating pads      Hal Albach      11/24/12 04:15      
   Undefined behaviour!      Andy Neil      11/24/12 04:51      
      bending it in neon      Erik Malund      11/24/12 08:31      
         That means that you're on your own ... no support       Richard Erlacher      11/24/12 08:53      
   Why?      Kai Klaas      11/24/12 08:52      
      Not in Dubai      Raj Nambiar      11/26/12 07:12      
         nobody has been that stupid      Erik Malund      11/26/12 07:47      
         So many pitfalls...        Oliver Sedlacek      11/26/12 10:18      
            testing      Erik Malund      11/26/12 12:49      
               And what is the cost of testing?      Kalpak Dabir      11/27/12 22:10      
                  the cost of testing      Andy Neil      11/29/12 00:54      
                     it's not just pass/fail ...        Richard Erlacher      11/30/12 09:47      
                        Tell me about it!      Andy Neil      11/30/12 11:24      
                        Why?      Erik Malund      11/30/12 14:13      
                           Why??? It's to protect your own gluteus maximus      Richard Erlacher      11/30/12 15:28      
         what would happen       Andy Neil      11/26/12 23:42      
   Heaters/controllers      Joseph Hebert      11/24/12 20:31      
   Low temp components      Oliver Sedlacek      11/26/12 02:45      
      Potting wont help       Andy Neil      11/26/12 23:45      
         it's probably less costly to heat a small enclosure      Richard Erlacher      11/27/12 00:08      
            at very cold start...      Stefan KAnev      11/27/12 06:18      
               Yes it can ...      Richard Erlacher      11/27/12 10:16      
   it's not that simple ...       Richard Erlacher      11/27/12 00:13      
      heater      Erik Malund      11/27/12 07:25      
         With an NTC resistor driving the base?      Oliver Sedlacek      11/27/12 08:35      
            It's very simple...      Kai Klaas      11/28/12 05:37      

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