In electronics, why is digital better than analog? by Khaled Alashmouny
Answer by Khaled Alashmouny:
Not sure why you think digital is better/superior than analog!
The truth is that almost anything you as a human interface with is analog by nature.
I would suggest to ask why convert natural signals to digital and do the processing there. Here are some quick reasons:
1. Noise: digital is 0/1 and susceptibility to noise is far less than analog
2. Scalability: digital can scale well with the technology. Analog does not scale as much (I can explain why later on)
3. Power: supply voltage scales with technology (getting slower though) also capacitance reduces as well.
All the process scaling is motivated therefore by the digital circuits
After processing you would need to convert back to analog (most of the time) for us as humans to understand what’s going on
I hope this helps