AD7730 VBIAS Pin

Hello,

I have a question about VBIAS pin of AD7730. 

According to the datasheet of AD7730, VBIAS pin is recommended that the user does not connect anything to this pin. On the other hand, VBIAS pin is connected to capacitor on the evaluation board of AD7730. How should we do the connection of VBIAS pin?

Best regards,

Akira