Hi Sougata,

I don't use the ADCIN command either, unless I'm feeling lazy or there is no need not to. I switch the registers as required. Especially in many uses (I research in Laser Medicine and build a lot of my own equipment) a different integration time for different inputs can be of benefit.

I even connect CCD array outputs directly to the ADC input and get excellent results by using the input circuitry in the PIC as a quasi charge measurement device. Set the reference voltages to, say, +3V and +1V and we get a good resolution. We don't even need to decouple the input, the charge function of the input capacitor does that.

Regards,

Rob