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Lowest ADC volatge that can be read using MOD5213

Posted: Thu Jul 19, 2012 1:20 pm
by nicobari
Hi,
I would like to know whats the minimum physical voltage that can be fed into ADC pins of the netburner. I am hoping to read signal of range 0.3-24 mv without amplification to reduce complexity. Thank you in advance.

Re: Lowest ADC volatge that can be read using MOD5213

Posted: Thu Jul 19, 2012 2:42 pm
by Chris Ruff
12 bit ADC -

3.3 volt / 4096 = 0.0008 volt per step


you will get some 30 digits out of a potential 4096 digits with your stated range of 0.3->24 mv

and the first digit doesn't turn on until .8 mv arrives

doesn't look too promising. And the noise on a 12 bit AD will kill you unless you filter the signal- hope you don't need to go too fast.

I would amplify it and filter as much as allowable for your application

Chris