There are three circuit figures in the EVB of Ad9954 t, i wonder what is the difference between U7 and U8, which include ad9954.
Moved to correct community
The differences between these two schematics are fairly straightforward. In the one with DUT2 identified as U8, the comparator can be fed by on outside source, whereas on DUT1 identified as U7, it is fed by the output of the AD9954. Secondly, in DUT2/U8 case, there is a crystal providing the input for the system clock as opposed to the DUT1/U7 case relying on a driven off board clock source.
Retrieving data ...