Daaf,
You may refer to the following forum post:
http://e2e.ti.com/support/data_converters/high_speed_data_converters/f/68/t/224608.aspx?pi79999=1
Scroll down to later conversations regarding the EVM board modification required for DC coupling.
The following app note would also help:
http://www.ti.com/lit/pdf/slua647
-Kang