Ancestors

Toot

Written by lcamtuf :verified: :verified: :verified: on 2025-01-12 at 16:54

How do analog-to-digital and digital-to-analog converters really work? The science behind it is pretty cool. I substantially reworked an earlier Substack article of mine: https://lcamtuf.substack.com/p/dacs-and-adcs-or-there-and-back-again/?new=1

This one is stuck in SEO hell, so it's hard to find on your own - check it out while you can!

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Descendants

Written by Rue Mohr on 2025-01-12 at 21:25

@lcamtuf oooh

750 ohms,

1.5k ohms

3k ohms...

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Written by Rue Mohr on 2025-01-12 at 21:35

@lcamtuf

By doing a WYE-to-DELTA conversion of the last 3 resistors in the R-2R DAC, you can save one resistor. This can help out a lot if your packed for space!

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Written by Rue Mohr on 2025-01-12 at 21:36

@lcamtuf but where did the other resistor go? Its between D0 and D1, so its not performing a purpose, throw it out!

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Written by tekhedd on 2025-01-13 at 05:39

@lcamtuf This plus a million little corner cases of noise and understanding the uncertainties of a manufacturing line and ... well honestly all that stuff around the DAC that amplifies it to -10 or +4 is really what separates the good shit from the garbage.

This isn't a secret, it's just something the shitty companies don't talk about.

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