Your ADuM1280 have the schmitt trigger at input parts.
So what is your threshold voltage rail of it?
Your datasheet show only VIH and VIL as following.
It is not the answer for this maybe....
From our data, the mean values at 25C are:
VDD 5V to 5V: VIL = 2.32V, VIH = 2.85V
VDD 3V to 3V: VIL = 1.24V, VIH = 1.72V
Thank you Brian,
Your answer mean the threshold rail between 2.32V to 2.85V eg; 5V VDD case, correct?
For the 5V VDD case at 25C, the average value of VIL = 2.32V, and the average value of VIH = 2.85V.
Retrieving data ...