[time-nuts] AD5791 for EFC control ?

Herbert Poetzl herbert at 13thfloor.at
Fri Apr 19 09:44:11 EDT 2013


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
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