[sdiy] Consider this DAC

[Antti Huovilainen]

On Sat, 13 Mar 2010, ASSI wrote:

> On Saturday 13 March 2010, Antti Huovilainen wrote:
>> Surely achieving < 1mV (for max 5V signal) noise floor and drift
>> can't be quite that hard?
>
> I think you need to calculate that again... for a fullscale signal of

Yes, but the question was whether 12 bit dac would already be at the limit 
of the rest of the circuitry.

> If you want resolution but not precision - go delta-sigma.  This DAC
> is for DC accuracy and yes, it will be hard to keep that precision
> throughout the complete signal chain.

Delta-sigma is rather the other extreme of the accuracy scale. For CV you 
want good enough accuracy (say, < 1 mV error) and a few bits higher 
resolution from that. From what I've read, delta-sigma audio DACs don't 
provide good enough DC accuracy.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova