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dac noob is confused

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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.

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