Hi Given that a “real” TDC is a resistor and capacitor attached to a FPGA pin (plus the ADC) the cost of doing it better is not all that much. You can get down to a few hundred ps without a lot of crazy effort ( still using the MCU ADC).
Bob > On May 13, 2016, at 3:51 AM, David <[email protected]> wrote: > > It is always an extra challenge to get even datasheet performance out > of sampling converters which are integrated with a microcontroller and > of course Microchip says nothing about noise or complete AC > performance. > > I suspect adding an external ADC to the Microchip CTMU while possible > would be a waste of effort. If you are going to do that, then you > might as well design in a real time to voltage converter. > > On Wed, 11 May 2016 07:27:14 -0400, you wrote: > >> Hi >> >> The same process issues that make for a less than perfect ADC, also >> add more than a little noise into the circuit. Exactly which component(s) >> are the biggest culprits > no idea. About all you can do is take data and >> look at the results. >> >> Bob > _______________________________________________ > 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.
