AC coupled input to ADC

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kutangurel

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Hi, I need to sample an analog AC signal ranging between -0.1V to 0.1V. I will take the digital ouput to an fpga, however Im having diffuculties in choosing the right ADC, since nearly all of the ones I looked act as if they accept only positive voltages in single ended operation and choosing a negative input to V- in differential input is not allowed. Am I mistaken? Could the ADC provided in the link allow a voltage input within the boudries I specified for example?

https://www.farnell.com/datasheets/50190.pdf

thanks in advance
 

It looks OK to me: the application circuit you're after is in figure 9.
When you work with a single supply you usually have a "virtual ground", in this case the output of the COM pin.
Think of the input voltages as positive or negative with respect to this reference voltage.
 

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