not sure the TI filter circuitry, although very nice, is stable with the ADA4522. have not checked, but R2/C2 loop stabilizer may not work with ad4522. would require analysis/test, but positive result would sure make this a great reference buffer amp. if you do, would be nice if you let the group know.
> Gesendet: Samstag, 09. April 2016 um 00:38 Uhr > Von: "Randy Evans" <[email protected]> > An: "Discussion of precise voltage measurement" <[email protected]> > Betreff: Re: [volt-nuts] ADA4522 > > I would use a filter such as TI's SBVA010 app note, "Improved Voltage > reference Filter has Several Advanatages" or the article by Walt Jung, > "Build an Ultra-Low Noise Voltage Reference" in Electronic Design. > > On Fri, Apr 8, 2016 at 1:02 AM, <[email protected]> wrote: > > > Low frequency noise is very good, but is is high noise at about 800kHz > > (chopper) and above (possible artifacts). That should be filtered, > > depending on your application. > > What did you foresee to get rid of it, or would you accept it? Simple RC > > filter as indicated in the manual increases the output resistance. > > > > > > > > > > > Gesendet: Freitag, 08. April 2016 um 03:35 Uhr > > > Von: "Randy Evans" <[email protected]> > > > An: "Discussion of precise voltage measurement" <[email protected]> > > > Betreff: Re: [volt-nuts] ADA4522 > > > > > > Sure, all good applications. I am thinking of using it as an output > > filter > > > for a 10V reference to filter all noise above 10Hz, > > > > > > On Thu, Apr 7, 2016 at 6:27 PM, Daniel Mendes <[email protected]> > > wrote: > > > > > > > Ada4522-2 and 4522-4 are stocked at mouser. What about summing all > > outputs > > > > to reduce noise? Or use as buffered outputs with good reverse > > isolation... > > > > > > > > Daniel > > > > Em 07/04/2016 13:31, "Randy Evans" <[email protected]> > > escreveu: > > > > > > > > > Has anyone looked at the ADA4522 precision op amp from Analog > > Devices. > > > > It > > > > > looks very intriguing with it's extremely low offset voltage drift > > of 22 > > > > > nV/°C maximum. The offset voltage is as high as 5 uV but this could > > be > > > > > nulled out and it should be very stable over temperature after > > that. It > > > > > could be a great choice for a voltage reference circuit. Looks quite > > > > > inexpensive also, although AD only sell in tubes of 96 right now. > > > > > _______________________________________________ > > > > > volt-nuts mailing list -- [email protected] > > > > > To unsubscribe, go to > > > > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > > > > and follow the instructions there. > > > > > > > > > _______________________________________________ > > > > volt-nuts mailing list -- [email protected] > > > > To unsubscribe, go to > > > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > > > and follow the instructions there. > > > > > > > _______________________________________________ > > > volt-nuts mailing list -- [email protected] > > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > > and follow the instructions there. > > > > > _______________________________________________ > > volt-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > and follow the instructions there. > > > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
