I tested on EVAL-ADuM4135EBZ ;
VDD1 to Vss1 = 5V;
(I connected D1 negative side to GND2 for DESAT detect)
when I power on the EVB; Output is -8V, nFault is high. Ready is high. nReset is high. VI+=0, VI-=0;
1: I connected VI+ to signal generator for 10Khz, 0 to 4V square wave; nFault is Low, why?
2: I disconnected signal generator, use jump wire connect VI+ to VDD1; nFault is Low, (Output is -8V).
Why nFault is high when power on and any VI+ input then it goes to low?
This is new EVB I order from Digikey