Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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seems a bit drastic

Posted by madisonears on July 24, 2017 at 18:40:00:
Sure, a scope would be sweet for everyone who wants to swap an opamp or two, but it's a pretty big expenditure and learning curve. These opamps are not mysterious or so difficult to implement. With proper bypassing (no excuse for skimping on that), decent circuit layout and non-capacitive load, the LM4562 should work if the OPA2134 already did. To ensure stability, a 100 ohm resistor can be placed in series with the outputs. Done.

As your friends have learned, simply dropping a high speed opamp into any circuit can have bumpy results, but it seems that the road to success is already mostly paved in this case.

If the OP can't sleep at night for fear of oscillation, he could borrow a scope or find a competent tech.

Peace,
Tom E