I checked following thread and others.
AD2S12xx SIN/COS input CMV query
AD2S1205/AD2S1210 Common-Mode Voltage
They say, the AD2S1210 SIN/COS CMV is REFOUT/2 = 1.25V +/- 100mV.
But our customer's EVB(EVAL-AD2S1210SDZ) which is evaluating now is,
SIN/COS is about 1.6V.
SINLO/COSLO is about 0.8V.
Is it correct spec?
CMV is unbalance.