To start, in this case, IN_GND = VREF1 = GND. The problem is that i have VO- = almost +VS and VO+=almost -VS whatever i have on IN+/IN-. I've tried to pull up with a resistor |PD but nothing change. I've also tried to isolate this schematic from the AD1938.
VS+ = 5V, Vs- = -5V.
I checked my schematic and PCB, nothing seems to be wrong.
thank you for your time.