[sdiy] (Ab)use DAC as mixer?

[rsdio at audiobanshee.com]

Very interesting, but it only has about 70 dB of isolation between channels. It appears to get better under 20 kHz, but they don’t show the performance in the audio range. I suppose it’s telling that ultrasonic signals have worse isolation - down to 42 dB at 900 kHz - but I don’t think 70 dB is very impressive.

For a single voice, that crosstalk might not be too bad. A better solution would be separate chips for each audio signal that needs high isolation from bleed-through.

Brian


On Jun 2, 2018, at 1:59 AM, Tim Ressel <timr at circuitabbey.com> wrote:
> Check out the datasheet for the AD7225 quad 8 bit MDAC. It has some cool examples.
> 
> --timmers