Hi. I have some questions regarding LTC6811-1 and 6812-1.
I'd like to know maximum power capacity of zener diode as below.
Please check if the capacities of LTC6811 and LTC6812 are different.
In isoSPI communication line using coupling capacitor, the recommended circuit on the datasheet has been changed as follows.
<before the change>
<after the change>
Applying the circuit after the change measures high radiation noise; applying the circuit before the change causes the signal level to be too low.
Please review if there is any problem in applying the damping resistance to 330 ohms and the termination resistance to 100 ohms. (Coupling C is 1nF, )
We will apply 1.4k and 601 ohms to Ibias side resistance. Do you have any other recommendations?
Additionally, if the Termination resistance is applied to the circuit at 100 ohms x2, please check if a 3.3V Zener diode is required (in the circuit before the change).
The transient voltage does not appear to exceed the maximum voltage range of the pin. I'm curious about the role of the Zener diode.
Thank you.