What about just using a couple of R-2R ladders? Then the problem mutates into
how to get 2 x 6 bit latches with limited IO pins :-)

>Hi, I need to implement 2 DAC with one PIC,
>preferably a 16F84, and I need reasonably
>fine resolution, at least 64 levels, pref
>128.
>
>I have tried the PWM options, but I need more
>speed, like the ability to adjust from full
>to zero output 32,000 times/sec. Using 20MHz
>PIC and home made PWM I can't even come close.
>
>So, any suggestions on getting 2x analogue
>output from a small PIC at high speed??
>:o)
>-Roman
>
Ray Gardiner ray@dsp.com.au
mail from: dsp systems

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