I see that there is a high resolution 130dB mode too that can give 21 bits @ 250 samples per second, good for very slow, high resolution DMTD (but also very stable voltage reference and ADC temperature, seems very challenging).
On Mon, Dec 10, 2012 at 4:26 PM, Robert LaJeunesse < rlajeune...@sbcglobal.net> wrote: > 31 bits is just a convenient word size that comes out of the on-chip > filter, and > does not really relate to performance. Better to look at SNR which, at > worst > case, is 120dB in high-res mode. That indicates performance just under 20 > bits, > typical for better monolithic sigma-delta converters. Nonetheless 20 bits > indicates a matching reference would have to hold 1PPM over temperature, no > simple task. > > > Bob LaJeunesse > > > > ________________________________ > From: Azelio Boriani <azelio.bori...@screen.it> > To: Discussion of precise time and frequency measurement < > time-nuts@febo.com> > Sent: Mon, December 10, 2012 9:39:30 AM > Subject: Re: [time-nuts] 31bit ADC, 1000 samples per second > > 31-bit is 186dB... with what do you compare that device? What kind of > reference is needed? > > On Sun, Dec 9, 2012 at 11:18 PM, Bob Camp <li...@rtty.us> wrote: > > > Hi > > > > It's the "big brother" of the ADS127x parts that I mentioned a little > > while back. I'm sure it works quite well. The 127x's are fine parts. The > > internal filtering combined with the chopper is a very nice combination. > > > > Bob > > > > On Dec 9, 2012, at 5:13 PM, Poul-Henning Kamp <p...@phk.freebsd.dk> > wrote: > > > > > > > > I'm doing some work with a couple of geophones (long story...) and > > > stumbled across TI's ADS1282 geophone ADC. > > > > > > It has some pretty amazing specs for low frequencies, and having played > > > with the EVAL board for an evening here in my lab, I'm pretty > impressed. > > > > > > People working with close-in phase-noise measurements may want to > > > consider this chip... > > > > > > -- > > > 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. > > > _______________________________________________ > 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. > _______________________________________________ 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.
