Electronics > Projects, Designs, and Technical Stuff
dac noob is confused
Wimberleytech:
--- Quote from: SiliconWizard on March 03, 2019, 01:15:18 am ---
Marketing a 32-bit sigma-delta DAC as 32-bit is indeed kind of misleading as it's mainly a technical choice and certainly doesn't have 8 more ENOBs than good 24-bit sigma-delta DACs, but it's not a lie per se.
--- End quote ---
OK, we agree (kinda). Marketing is not lying...it is, well, marketing!
BTW, I understand how delta-sigma DAC (and ADCs) work.
You say "analog front-end" when I think you mean back-end smoothing filter (for a DAC), no?
radiolistener:
yes, delta-sigma technology allows to improve linearity, it allows to get much better SNR performance than with classic DAC.
Wimberleytech:
--- Quote from: radiolistener on March 03, 2019, 01:46:57 am ---yes, delta-sigma technology allows to improve linearity, it allows to get much better SNR performance than with classic DAC.
--- End quote ---
Certainly!...but that is not where this discussion started.
radiolistener:
--- Quote from: Wimberleytech on March 03, 2019, 01:40:06 am ---Marketing is not lying...it is, well, marketing!
--- End quote ---
There is no marketing. You're trying to compare parameters of real DAC with parameters of ideal DAC.
Ideal DAC is just a theoretical model, it will never be created, because this is DAC which bypass all known physical limitations and impossible to implement in the real world :)
Real DAC parameters always will be worse.
It has non ideal linearity, non-zero jitter, some real world noises.
And this is why it's SNR is worse. Not because marketing or fake bit resolution :)
Wimberleytech:
--- Quote from: radiolistener on March 03, 2019, 02:05:14 am ---
--- Quote from: Wimberleytech on March 03, 2019, 01:40:06 am ---Marketing is not lying...it is, well, marketing!
--- End quote ---
There is no marketing. You're trying to compare parameters of real DAC with parameters of ideal DAC.
Ideal DAC is just a theoretical model, it will never be created, because this is DAC which bypass all known physical limitations and impossible to implement in the real world :)
Real DAC parameters always will be worse.
It has non ideal linearity, non-zero jitter, some real world noises.
And this is why it's SNR is worse. Not because marketing or fake bit resolution :)
--- End quote ---
Yes, and I do real magic. Forget the fact that it is illusion...that is just a manifestation of the real world in which we live. Trust me, I made that helicopter disappear before your eyes.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version