[sdiy] I2C DAC

[Eric Brombaugh]

On 06/21/2010 04:38 PM, Mike Beauchamp wrote:
> I don't mean to jump in on this thread, but can anyone show me an
> example of a 12-bit DAC  (I2C is fine) that is being used to output
> CV?
>
> I guess I was always under the impression that DAC chips were only
> useful for audio applications (that is, constantly changing values)
> and I never thought they could actually just "hold" a value and do it
> with any stability, etc.


An example from my project files that uses a SPI DAC7554 is here:

http://members.cox.net/ebrombaugh1/synth/dsPICfun/index.html

These types of DACs hold their output value quite steady when not being 
updated.

There is a specific class of audio DACs (sigma-delta) that don't work 
well for steady output values, but many others are fine.

Eric