I would like to create a 16 bit DAC in STM32F103RET6. But STM32F103RET6 only has 12 bit DAC. How do I implement a higher resolution DAC in STM32F103RET6? Thank you. Please see the file AN64275 in google
I think it is a DAC he is talking about and not a ADC
And with a DAC the issue is to modulate the output with a low-pass filter. So similar strategy. If the DAC toggles 50% of the time between two values, then the low-pass-filtered value will be an intermediate value similar to an extra bit of resolution - but with a loss of output bandwidth.
Trying to add 4 additional bits obviously adds the issue of stability of that low-pass-filtering to the issue - digital noise on the ground plane might represent several bits of the intended output resolution.