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Published 20 hours ago • verified publisher icon osresearch

8-bit DAC

Open osresearch opened this issue 6 years ago • 3 comments

Are there decent 8-bit parallel DACs that we could put on the board?

osresearch avatar Mar 12 '18 01:03 osresearch

Maybe the MAX5184? 40 MHz, 10 bit.

osresearch avatar Mar 12 '18 02:03 osresearch

Can that be powered off the Beaglebone's 3V3 line?

phooky avatar Mar 23 '18 20:03 phooky

I think we can power it from the Beaglebone -- both the analog and digital voltage supply want 3.3V and less than 10mA together. The output voltage on the i386 video appears to be 0-1V, so the MAX5184's 1.2V reference seems reasonable.

5-bit r2r dac

Alternatively, the 5-bit r2r DAC on the green channel seems to produce reasonable results and doesn't interfere with the boot mode.

osresearch avatar Mar 25 '18 22:03 osresearch