Hi Team,
Could you please tell me how I/P signal frequency and comparator delay is related.
When I used nanopower comparator my i/p and o/p are out of phase.
https://e2e.ti.com/support/amplifiers/f/14/t/833681
Regards
hari
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Hi Team,
Could you please tell me how I/P signal frequency and comparator delay is related.
When I used nanopower comparator my i/p and o/p are out of phase.
https://e2e.ti.com/support/amplifiers/f/14/t/833681
Regards
hari
Hari
At some point if the input frequency is too high, a low power comparator will not be able to respond to the changes on the input. A conservative estimate is to take the inverse of the sum of the two propagation delay values plus an output rising and falling edge and compare that to the input frequency.
Specifically in the case you described, the prop delay (phase shift of input to output) would be approximately 3us assuming 100mv overshoot and undershoot levels. The prop delay could be a little more or a little less if the actual levels are different.
Chuck
Hari
That is a hard question to answer. Temperature and process are variables to consider but so is underdrive and overdrive levels. For a given amount of OD and UD, a factor of 1.5x to 2x would be a fair assumption.
Chuck
Hari
I have not seen any further questions on this thread, so I will be closing the thread. If you have any additional questions, please reply or feel free to open a new post.
Thanks
Chuck