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In Reply to: RE: Precision resistors posted by jusbe on November 12, 2016 at 07:49:34
True, and in addition to the resistor accuracy challenge is the issue of maintaining that accuracy over temperature variation. There are other challeneges as well, such as minimizing glitch energy. These are challenges both of design and of manufacture.
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Ken Newton
Follow Ups:
This is also what I admired about the Philips TDA1541A, and whose execution in designs like the AMR CD77 is so noteworthy.
Do you know if such implementations were required/possible/executed with Burr Brown's DACs, by any chance?
DEM described.
Big J
"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."
Not the older Burr-Brown full resolution DACs, such the PCM63 or PCM1702/1704. However, the newer Burr-Brown/T.I. sigma-delta based PCM179x series DACs utilize a type of DEM called data-weighted-averaging (DWA) to convert the quantizer element inaccuracy (which otherwise produce distortion) in to random noise. See the below youtube video for an explanantion on the differences.
https://www.youtube.com/watch?v=BYLo2zRJ7FU&sns=em
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Ken Newton
Big J
"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."
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