[sdiy] LM741 substitute

[Magnus Danielson]

Samppa Tolvanen wrote:
> On Fri, Jul 10, 2009 at 5:41 PM, Tom Wiltshire<tom at electricdruid.net> wrote:
>> As long as the pinouts are the same, most op-amps are very forgiving. You
>> can mostly swap op-amps for a "better" one (lower noise, lower power
>> consumption, whatever) without any problems. Obviously there are a few rare
>> circuits where a particular part is critical, but I've never seen one.
>>
> 
> I *think* there are a couple of gotchas: unity-gain stability and compensation.

Indeed. For comparators may shifting to a faster op-amp cause increased 
interference. Hooking a 100 nF decoupling cap on the power supply real 
close should cure most of it.

Also, some rare curcuits do depend on the internal layout of a 
particular op-amp. Jürgen Haible reported on one such design in the 
Synthi-A project he did. It's deep into the archives, but google should 
help you.

Cheers,
Magnus