| Electronics > Projects, Designs, and Technical Stuff |
| 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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