DAC "error"

[Paul Schreiber]

> Do you mean that 10.4mV is the resolution error?  The differential
> linearity error would be some fraction of that depending on the DAC.

That's the resolution error.

>
> Assuming you mean 10.4mV as a resolution error, I believe this spec is
> important if one is trying to accurately hit *any arbitrary* voltage
> accurately, not if one is *only* interested in hitting multiples of
> 83.3mV accurately, starting at 0V (as with simple MIDI/CV converters).

For this argument, assuming 1V/Oct control for VCOs. The pitches are on
83.3mv steps.

>
> However I agree that even with this "step voltage selection" method a
> 1/4 LSB 8 bit converter would not have sufficient differential linearity
> to meet your pitch accuracy specification.

Amen, brother! But if 1LSB *is a step*, then 1/4LSB is 25% error! You need
1/100th LSB.

Paul S.