I have a simple reference loop using the ADF4001 and a VCXO. The REFin and RFinA inputs are both at 10MHz (phase detector is at 1MHz). I notice on the scope that these two inputs, pins 8 and 6 of the TSSOP, are almost exactly 180 degrees out of phase. Is this normal? Is the part designed this way?
It isn't a problem, I just need to know if this is by design, so I can depend on it always being this way. I cannot tell from the datasheet.