I am using the ISO1541-Q1 I2C isolator in an application where side 2 is connected to battery power. In this usage, the isolator in question has the highest quiescent current draw of all my components drawing from battery power, in an application where keeping current draw low is critical.
The I2C messages in general will be used very intermittently and prompted by a main board (side 1) connected to system power. Would there be issues cutting Side 2 power to the ISO1541-Q1, via a control signal on the main board and an opto-SSR when the Isolator will not be in use? Would this cause any issues or lead to a long ramp-up/lead up time when turned back on to send a message?
The original isolator component I had picked was the AduM2251 and I was told that cutting power to side 2 when not in use would not be an issue. I prefer this part for its package and a couple other specs so I just wanted to confirm this would be okay in my application.