Other Parts Discussed in Thread: ISO1641
for some reasons I'm not able to implement a power isolation between master and slave in one of our application. So, I'm thinking about of signal isolation implementation only, like shown on the picture below.
I'm thinking that also only signal isolation is better than no isolation. Without any isolation, high current values (becasue of high power consumption of slave device) could affect on the I2C communication because of voltage drop over the ground lines. With signal isolation implemented, voltage drop should not have an effect on communication any more, because I2C isolator generates SDA/SCL signal with voltage level relative to the master ground level on one side and slave ground level on the other side.
What do you think?