Q2686 ADC resolution - 10 or 12 bits ?


#1

I cant work out the resolution of the ADC channels. The 2686 data sheet says that channels 1 & 2 are 10-bits, but the at+adc command reports back 12 bits. This might mean the hw manual is wrong and the ADCs are actually 12 bits, or it might mean that the sw reports ten bit values but pads them out to 12 somehow. Does anyone know ?


#2

AFAIK the resolution is padded by software to 12 bit while having actually 10 bits resolution. And also wavecom’s ADC has a gross non-linearity. It cannot be trusted on low input voltages.