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Power is not clean, how high precision DAC made?

Question asked by richieqianle on Oct 19, 2012
Latest reply on Nov 16, 2012 by EstiS

As is shown in my oscilloscope, the power has -20mV-+20mV broadband noises.

 

I suppose most power supplies contain noises, am I correct?

 

If the power is not clean, how could high precision circuit be made? For example a 10V,24 bit DAC will have 0.6uV precision.

 

How could that be possible???

Are by-pass capacitors enough???

 

Thank you

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