Hello, I am trying to prototype the use of ISOW7841 by using SPI from a "master" Arduino to an external, SPI interface ADC connected to 3.3V of a 2nd Arduino. For whatever reason, the chip starts getting ridiculously hot after the initial 5min of operation, and I notice the voltage at VISO going high. I have wired as shown in the attached drawing. Any ideas? I know I don't have the decoupling caps, but would this really affect the DC-DC converter in such a negative way? This chips are expensive (~$10) and I feel like I've already destroyed 2 :/
Also just to note, the voltage from VISO to GND2 when the master Arduino in not connected is around 2.3V which I find curious.