I'm using a bio sensor with 3 wires interface, I want to measure the current that can vary from 1 nA to 1uA.
-What are the value for RCAL, RTIA and CTIA?
-How can I convert the value from ADC to current?
Thanks in advance,
There was a similar question posted a few weeks ago on measuring small currents: ADUCM350 amperometric measurement of ~nA current
While it is possible to measure very small currents using the ADuCM350, it may require custom hardware, depending on the specifications of your measurement. The Eval-ADUCM350EBZ evaluation system has not been designed with these low current measurements in mind. Noise introduced by the board will have an impact on the measurements.
Application notes AN-1281 and AN-1271 should assist you in selecting the values for your passive components and converting ADC codes to current.
Thank you very much Emoloney
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