Hi I have not dug into them for several years. Back when I did, you were pushing their limits as a couple of nanoseconds without getting into things like lots of averaging.
Bob > On May 10, 2016, at 8:29 PM, David <[email protected]> wrote: > > I ran a search through the time-nuts archives and found only one > mention of this a couple years ago asking the same question which is, > has anybody explored the capabilities of the Microchip PIC CTMU for > use as a time to digital converter or programmable delay? > > The Microchip datasheets lack detailed performance specifications but > my conservative estimate is that resolution down to 500ps over 200ns > using the built in 10 bit ADC should be possible without complex > calibration. (The PIC series ADCs with more than 10 bits are pretty > horrible.) > > See What You Can Do with the CTMU: > http://ww1.microchip.com/downloads/en/AppNotes/CTMU%2001375a.pdf > > Overview of Charge Time Measurement Unit (CTMU): > http://www.microchip.com/stellent/groups/SiteComm_sg/documents/DeviceDoc/en542792.pdf > > PIC18(L)F2X/4XK22 w/10 Bit ADC: > http://ww1.microchip.com/downloads/en/DeviceDoc/39977f.pdf > > PIC18F66K80 w/12 Bit ADC: > http://ww1.microchip.com/downloads/en/DeviceDoc/39977f.pdf > > I prefer more discrete implementations but this might be useful for > its higher integration, lower cost, and simplicity in less demanding > applications. > _______________________________________________ > 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. _______________________________________________ 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.
