[SI-LIST] Re: Measuring Power supply noise

> Well I'm trying not to use all these passives and just ONE ADC chip to
> measure noise. 

> Again original question remains, Any critic to this idea? 

You are jumping out of a nice comfortable frying pan into a raging inferno.


How many passives do you think it will take to make your ADC work?

What sort of sample rate and how many bits do you want?  Have you looked at 
any data sheets or app notes?  (Try TI and/or Analog Devices.  Both have good 
web sites.)

You can get ADCs in tiny packages, but those chips are only useful for 
measuring the (average) DC voltage rather than measuring the noise on a power 
rail.

Other considerations:  Where are you going to get the clock for it?  How are 
you going to collect the data that comes out of it?


We really are fortunate that the scope companies are making such wonderful 
gear.  I often wonder what they use to debug/test their top of the line 
products.



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