I am not sure why one of the advantages of Digital vs Analog communication is higher SNR?
For example, when I want to transfer a 4.5v signal vs a 5v signal, how does converting these values to some digital levels first (e.g. using a 16-bit ADC) will help the communication path to have higher SNR?
Also, I read an article which points out the followings:
- SNR of a digital signal determined by the maximum discrete amplitude and the resolution of the A/D (volts/count).
- SNR of analog signal determined by power supply rails and by noise floor.
Could someone please explain what that means also? and why?