I am trying to set up the situation on page22 and 23 adn looking to get a bigger dynamic range. I am measuring 0 thru -100 in one db step and i am not getting the advertised dynamic range.
i am currently using a eval board for the 5513 and the eval board for the ADL5330 and AD8062. Setup just like the picture except the VSET and Vout are tied together like on the eval board.
I have ran this using a filter and a coupler with a dynamic range -2 to 60. See attached data. This is 200 runn of 0 to -100.
Can you suggest improvment Ideas.