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R-2R ladder DAC chips are still in production.

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R-2R ladder DAC chips are still in production today with the same benefits you described in your post. "The fact that it is a monolithic chip makes it both consistent and wonderfully accurate to work with, something that a discrete ladder cannot achieve even with the highest precision resistors.."

One of many examples still in production today


Schitt uses these or a variant in some of their DACs.





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