I am FAE in Japanese distributor.
Our customer produces his product using AD633.
He is calibrating AD633 at Vs+=15V, Vs-=-15V, X1=0V, X2=0V, Y1=2.5V, Y2=0V.
After the calibration, he test AD633 the condition is followings.
Vs+=15V, Vs-=-15V, X1=0.2Vsinusoid, X2=0V, Y1=2.5V+1Vsinusoid, Y2=0V.
X1 and Y1 sinusoid are 50Hz and same phase.
He found irregular AD633 device which showed W voltage shows under the calibration voltage.
Please see the wave picture.
Does the device violate the specifications?
If the device is normal, could you advice the cause of this phenomenon?