How to disable one of the OPA2134 amplifiers?

Lee Hardesty

Other Parts Discussed in Thread: OPA2134, OPA134

Just wondering if there is an approved way to disable unused sections of the OPA2134 amplifiers? The goal would be to reduce power consumption.

Thanks for any suggestions!

LHH

over 13 years ago

0 Jayant Deshpande over 13 years ago

Expert 1495 points

Why not use the OPA134 instead ?

Regards,

JayantD

0 Bruce Trump over 13 years ago in reply to Jayant Deshpande

Guru 21975 points

Jayant's suggestion is a good one.

The answer is that there is no way to shut down an unused channel of the OPA2134 to reduce quiescent current.

Regards, Bruce.

0 Lee Hardesty over 13 years ago in reply to Bruce Trump

Prodigy 20 points

Yes, I am aware of the single channel devices but hoped there might be a way to disable a channel by tieing the inputs to one of the rails or some intermediate voltage (this works for some dual amplifier designs). In this case we will be using quite a few 2134's and it might be cheaper to increase the production quantities vs adding another part number at much lower quantities.

Anyway, thanks for the suggestions.

LHH

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How to disable one of the OPA2134 amplifiers?