[sdiy] discrete DAC accuracy

[Neil Johnson]

[lots deleted!]

> Well, yes... you're probably right. For resistors that is. For other stuff it
> doesn't work that way simply because there isn't the same distribution of
> target-values.

Quite probably!  I should check out capacitors as well, just to satisfy my
curiosity!

> The point here is anyway that you can't trust the distribution, whatever
> it is supposed to be. Real values of resistors will be much better.

Indeed.  Even so far that datasheets do not specify distribution curves at
all, so there is no data to base any assumption on.

Also, many things can change resistors, from handling to humidity, to how
they are soldered onto the board.  High-precision resistors are treated
very carefully.

Cheers,
Neil

--
Neil Johnson :: Computer Laboratory :: University of Cambridge ::
http://www.njohnson.co.uk          http://www.cl.cam.ac.uk/~nej22
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