Broken EVAL-AD7616?

Hi,

I'm using the evaluation board EVAL-AD7616 together with an EVAL-SDP-CB1Z and the ACE software. 

When I have no input signal the ADC shows 2V:

And when i input a 3.3V signal it shows 3.3V which is correct (blue channel):

This has led me to believe that there is something wrong with my setup. Shouldn't it say 0 volt when no signal is applied? I have tried to reset the system and restore to default settings but nothing seems to work. Any suggestions?

BG