I have AD9549BCPZ, when the part is in open loop, that is, Input the signal
from FDBK_IN, and observe the signal at HSTL and CMOS, I found HSTL has an
output, but CMOS hasn't any output.
My part number is AD9549BCPZ, but the datasheet is for AD9549ABCPZ. Is there a
difference between BCPZ and ABCPZ and will this cause the problem?
The CMOS output must be turned on in the register map, and powered using Pin 37.
Rev A of the part has a slightly larger die pad on the bottom of the part, so
no, that won't matter.