[sdiy] Static Damage to ICs

[Scott Gravenhorst]

Hmm yeah me too, isn't that why they put the protection
diodes in CMOS designs?  If the protection diode is capable 
of conducting the "lighting strike", then the gate insulator
never gets punctured.  So the assumption is that the diodes
*are* capable of conducting nondestructively in at least 
some of the cases.  Otherwise there would be no point to
adding the diodes since they would be destroyed and probably
kill the device's input anyway.

=?iso-8859-1?Q?Ren=E9?= Schmitz <uzs159 at uni-bonn.de> wrote:
>At 07:24 13.03.02 -0800, you wrote:
>>    However, with opamps and the like, the failure is generally fairly
>>subtle.  For Fet opamps, a lot of time it increases the leakage current
>>in the inputs.  A TL072, while it does have fairly low bias currents, it
>>is really not all that low.  So, you may or may not notice the damage
>>right away.
>
>A TL072 has JFET inputs, how do you blow away its gate "insulation",
>shouldn't 
>it zehner long before?! I was always under the impression that bipolar 
>transistors and JFETs were pretty immune to static discharge. 
>
>Cheers,
> René
>
>
>-- 
>uzs159 at uni-bonn.de
>http://www.uni-bonn.de/~uzs159
>
> 
>

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