AD7631 power supply problem

Question

After provided the power supply to AD7631 VCC=+12V, VEE=-12V, AVDD=DVDD=+5V,
OVDD=+3.3V, I tested the voltage at the AD7631 power supply pins. I found that
the voltage at OVDD is 4.3V rather than 3.3V. When I disconnected the power
supply to OVDD, I found there was a 4.6V voltage at this pin. I wondered why
the voltage at OVDD was changed. Is there any potential problem if it is not
3.3V?

Answer

Do not connect TEN,BIPOLAR with 5V voltage level. Change to 3.3V level.