[sdiy] Op amp selection and the box 'o parts

[Aaron Lanterman]

On Mon, 13 Nov 2006, Tim Parkhurst wrote:

> I know this has been brought up before, and I meant to make a chart or
> something, but then I got distracted by something shiny... anyway,
> there are some op amps that behave just fine when fed inputs at or
> near the supply rails, while there are others that will phase reverse
> or even latch up, any comments from the gurus out there? Any other

That phase reversal thing can be nasty:

http://www.planetanalog.com/showArticle.jhtml?articleID=59302418

> untoward behavior to watch out for from certain amps? (as this might
> make good infor for Aaron's students). Also Aaron, don't completely
> ignore the 741. There are cases where the relatively low bandwidth
> might be a plus (preventing HF oscillations, maybe even in PWM or
> anti-aliasing filters).

All the student EE labs stock copious quanities of 741s (it's the main op 
amp every ECE student tortures through multiple lab classes), so we're 
covered there.

- Aaron

-----------------------------------------------------------------------------

Dr. Aaron Lanterman, Asst. Prof.
and Demetrius T. Paris Junior Prof.    Voice:  404-385-2548
College of Electrical and Comp. Eng.   Fax:    404-894-8363
Georgia Institute of Technology        E-mail: lanterma at ece.gatech.edu
Mail Code 0250                         Web:    users.ece.gatech.edu/~lanterma
Atlanta, GA 30332                      Office: Centergy 5212