[sdiy] TL072??

[David G Dixon]

> The situations in which a TL082 works, and not a TL072, might 
> very well be that this particular TL072 (or the whole tube it 
> has been taken from) is a bit above typical specs, while the 
> TL082 is dead on (or lower). Parameters like offset voltage 
> and bias currents can vary a lot between their "typical" and 
> "maximum" value. It wouldn't surprise me if you found later a 
> tube of TL082s that wouldn't work, and TL072s that worked!
> 
> You'd better understand which parameters are critical for 
> your application...

In my view, if a design is sensitive to the fluctuations between the
"typical" and "maximum" values of datasheet parameters of a certain chip,
then that chip isn't appropriate for that design.