It seems that I could feed the outputs from the pwm to the reference inputs of the adc, with plenty of filtering, and change the range of the ADC, if I were in no great hurry about it. A full scale range of a volt seems intuitively possible, but putting a millivolt of reference in and expecting it to count microvolts doesn't! Has anyone any experience of just how far you can go and still obtain useful results?
Sorry,I forgot to mention I am using a PIC16F887, but I expect the limitations would be similar for any microcontroller.
Sorry,I forgot to mention I am using a PIC16F887, but I expect the limitations would be similar for any microcontroller.
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