[time-nuts] AD5791 for EFC control ?

EWKehren at aol.com EWKehren at aol.com
Sat Apr 20 15:59:24 EDT 2013


where did you find it for $ 8?
Bert
 
 
In a message dated 4/20/2013 3:48:08 P.M. Eastern Daylight Time,  
paulswedb at gmail.com writes:


Looked  up the DAC1220 and thats a very nice chip for ~$8.
Amazing 20 bit  resolution and easy to hook up.
Regards
Paul
WB8TSL


On  Sat, Apr 20, 2013 at 6:00 AM, <EWKehren at aol.com> wrote:

> the  DAC1220 is definitely worth a second look. Two wire opto coupling  
makes
>  it even better. On my next PCB run there will be a test  circuit. Thank 
you
> for  the hint.
> Bert  Kehren
>
>
> In a message dated 4/19/2013 9:44:32 A.M.  Eastern Daylight Time,
> herbert at 13thfloor.at writes:
>
> On  Fri,  Apr 19, 2013 at 09:20:05AM -0400, EWKehren at aol.com wrote:
>  > As one of  our digital loop projects we took a very, very  close
> > look at it, but  thought once you consider the  application,
> >  requirements of external references, its  influence on
> > temperature performance and cost, a dithered 20 bit  LTC  1655
> > held at 0.1 C is as good a  solution.
>
> Texas  Instruments has a number of precision  DACs for a
> very reasonable price, for  example the DAC1220  (20bit
> low power delta-sigma, ~8 USD) and precision   voltage
> references to go with (e.g. REF5050, ~2   USD).
>
> best,
> Herbert
>
> > Have not  actually tested a 5791 but  I know some one that has
> > an  evaluation board.
>
> > I will ask him to contact you off  list
>
> >  Bert Kehren
>
>
> > In a  message dated 4/19/2013 7:22:16 A.M. Eastern  Daylight Time,
> >  phk at phk.freebsd.dk writes:
>
>
> >  Has   anybody tried using the AD5791 20bit DAC for EFC control   ?
>
> > --
> > Poul-Henning Kamp     |  UNIX since Zilog Zeus  3.20
> >  phk at 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.
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