Re: What is the jelly bean DAC du jour?

I don't know what the term is exactly, but it's how we implement D2As
other than Delta Sigma.

You can take a XC9536 (36 macrocells) and make 4 8 bits up/down
counters (plus some other logics). As long as your target values does
not change much, there is only incremental countings. So most of the
time, the chip is idle.

You can wire the outputs via R-networks and op-amp summing junctions.
So, you need 1/4 XC9536, 8 resistors and one op-amp per channel. It
could be less than 50 cents each.

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