On Sat, Apr 20, 2013 at 08:14:06PM +0000, Poul-Henning Kamp wrote: > I looked at the DAC1220 first, but in an EFC application it > worries me to no end that it is a Sigma-Delta DAC.
> Even if I feed it a clock divided down from the OCXO you're > EFC'ing, to avoid beatfrequency effects, I would still worry > about harmonic effects and noise. > Also, the noise-spec is pretty horrid, almost a > microvolt/sqrt(Hz) all the way to one kHz. > For comparison the AD5791 is purely static and its noise is > below 10 nv/sqrt(Hz) from 5Hz and up. At a price of ~100 USD (100pcs for ~50 USD each) it's also in a different price range as the DAC1220 which can be bought for less than 20 USD (~8 USD when you buy 100). best, Herbert > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > p...@freebsd.org | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.