DAC "error"

[Chris MacDonald]

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

Although you might disapprove I should say that I have worked up a
MIDI/CV converter with an 8 bit DAC (DAC0808LCN) where 1 bit was half a
step.  Now I realize this device is no match for a Kenton and that with
a maximum error spec of 1/2 LSB there is a possibility of up to +/- 25
cents error from a semitone.  But my goal was lowest possible cost (even
$10 each is not cheap in this application) not superior performance, and
as it turns out I haven't found a specimen so far that has exhibited
unacceptably high error.  If someone can point me to a readily available
12 bit DAC for around $1.29 though that would be great!