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Title: Dual OP amp, unused pins, McMeat
Post by: markusw on March 18, 2004, 09:40:03 AM

Hi all,

a question to all the gurus out there.

I want to use a dual op amp to optionally invert the wet signal in a McMeat (with a switch). Since I just need one of the two op amps of the NE5532 I wondered whether I can leave the unused pins (inputs and output) free or whether I should connect them to e.g. Vref in order to avoid noise (if there is any)?

Thanks in advance,

Markus

Title: Dual OP amp, unused pins, McMeat
Post by: Joep on March 18, 2004, 10:17:31 AM

"+" to ground

"-" and "out" connected to each other.

That will do I guess.....

Title: Bypassing unused half of a dual op-amp
Post by: David on March 18, 2004, 10:26:21 AM

On Jack Orman's site in the documentation for his mixer, he mentions that you can use a dual op-amp in place of a single if you ground out the inputs of the unused half. I don't know anything about connecting the output to one of the inputs. I do know from experience that grounding out both inputs does indeed work.

Title: Dual OP amp, unused pins, McMeat
Post by: markusw on March 19, 2004, 08:42:57 AM

Thanks a lot guys!!!

I will try both variants and tell you which one works better.

Markus

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DIY Stompboxes => Building your own stompbox => Topic started by: markusw on March 18, 2004, 09:40:03 AM