Kobayashi-san,
Since there are three forum posts regarding the same application for end customer, we will discuss this topic on the following forum posts:
http://e2e.ti.com/support/data_converters/high_speed_data_converters/f/68/t/307940.aspx
https://e2e.ti.com/support/data_converters/high_speed_data_converters/int-high_speed_data_converters/f/70/p/308638/1081178.aspx#1081178
-Kang