[sdiy] Op Amp Buffer stability

David G. Dixon dixon at interchange.ubc.ca
Fri Sep 25 08:30:15 CEST 2009


> If there isn't any noise that bothers you, you don't the cap on the
> resistor divider. But if your application is sensitive to noise,
> that cap is the first thing I'd put in.
> 10uF on the power supply rails are just like the 10uF at the output of an
> opamp buffer: They won't filter the reference / voltage
> regulator noise, but they help decoupling the loads (to some degree), and
> they are required to keep the regulators stable.

I generally put an additional cap directly downstream of an on-board voltage
regulator (such as 78L05).  Are you saying that I should do the same with a
voltage reference (such as REF02)?




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