IIRC, switching EM noise from the microcontroller itself (at the MHz range) starts to affect the ADC/DAC. Your "16”-bit converter gives 12 useful bits and 4 bit

IIRC, switching EM noise from the microcontroller itself (at the MHz range) starts to affect the ADC/DAC. Your "16”-bit converter gives 12 useful bits and 4 bits of junk. For an ADC, you can get back useful bits via Oversampling & Decimation, at the expense of bandwidth.