Kinetis Microcontrollers中的主题 Comparitor minimum pulse width on a K65

Comparitor minimum pulse width on a K65

therealfreegeek — Tue, 15 Dec 2015 13:47:43 GMT

I am thinking about using the K64 to count pulses from a muon detector, the pulse will be 5 to 10nS wide, I will use the on chip comparator to feed the timers. Will I need to stretch the pulses to trigger the timer count and input capture inputs?

Re: Comparitor minimum pulse width on a K65

kerryzhou — Thu, 17 Dec 2015 09:10:31 GMT

Hi therealfreegeek,

Please see the datasheet find the comparator minimum pulse width.

So, you must keep the pulse typically in 50 ns, 5ns-10ns is really very small, internal comparator can't realize it, please choose the external comparator.

Wish it helps you!

If you still have question, please contact me!

Have a great day,

Jingjing

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Re: Comparitor minimum pulse width on a K65

therealfreegeek — Thu, 17 Dec 2015 11:39:13 GMT

Thanks, I will use an external fast comparator / monostable like the LM1711.