> > According to the pdf, the inputs and output of this op amp > > are bipolar, and "The differential input voltage may be larger > > than V+ without damaging the device. Protection should be > > provided to prevent the input voltages from going negative > > more than ?0.3V (at 250C)." (pag. 9). > > > > It seems to me that you will have no problems in the scenario > > you propose. You will get a consistent, saturated +4.9V to +4.99V. I STRONGLY advise that you try this. Some opamps DEFINITELY misbehave and swap output polarity under certain illegal input conditions. The above assurance says that the device will not be damaged BUT does not say that it will work properly or that it will "fail gracefully". Using any device outside specs leaves you having to do enough real world tests to be sure that it will meet your needs (unfortunately :-) ) RM -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads