Lowest ADC volatge that can be read using MOD5213

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nicobari
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Joined: Mon Jan 30, 2012 12:15 pm

Lowest ADC volatge that can be read using MOD5213

Post 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.
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Chris Ruff
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Re: Lowest ADC volatge that can be read using MOD5213

Post 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
Real Programmers don't comment their code. If it was hard to write, it should be hard to understand
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