Content originally posted in LPCWare by UncleJoe on Sun Jun 22 15:01:15 MST 2014
I'm wondering if I can directly measure the heart's ECG with a micro controller.
I need very high accuracy (in the sub mV range), but very low bandwidth. I've tried putting together a circuit with the ADC voltage reference (VDDA) set to 0.1V, but no matter what, my ADC readings are always 1023.
I don't see the minimum reference voltage mentioned in the documentation. Is there one?