Hi David,
It's an odd situation. From the datasheet: "Note: The DAC module is designed specifically for audio applications and is not recommended for control type applications." I had hoped that it wouldn't be a problem for driving an OCXO, but my mistake. The datasheet also notes that the DAC has 16-bit resolution but only 14-bit accuracy. It didn't seem to have even that at DC. The PWM version doesn't have any escape clauses. You set "x" parameters and it's supposed to be 16-bits wide. Maybe "audio" means within the human auditory passband? Bob ________________________________ From: Dr. David Kirkby (Kirkby Microwave Ltd) <[email protected]> To: Bob Stewart <[email protected]>; Discussion of precise time and frequency measurement <[email protected]> Sent: Saturday, September 13, 2014 4:27 PM Subject: Re: [time-nuts] Help understanding an ADEV On 11 Sep 2014 04:35, "Bob Stewart" <[email protected]> wrote: > I've ordered the PWM version of the PIC, and hopefully, since it's the motor > control version (as opposed to the audio version) it will have much better > noise performance. I don't know the PIC but I would have thought chips for audio would be optimised for low noise far less than one for driving motors. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
