I want to get 16 bit ADC resolution from 12 bit ADC using oversampling. We can get 16 bit by 12 bit ADC with oversampling ratio (OSR) of 16 and also by OSR of 256 and right by 4 bit. What is the difference between this two.

[KnarfB]

> We can get 16 bit by 12 bit ADC with oversampling ratio (OSR) of 16

No, this follows from responses to your previous posts. Each oversampling factor of 4 buys you 1 bit, and even this is only true under certain assumptions like a white noise model,... read that app note.

hth

KnarfB