My customer reported as follows. Would you teach me what happened inside ADuM1400.
He didn't mount side2 PINs
He supplied 3.3V between VDD1 and GND1.
when he measured the voltage between VDD2 and GND2, it was 0.62V
I believe the circuit in side1 is active and the circuit in side2 is NOT active.
why did he observe 0.62V between VDD2 and GND2?