I have a customer who is using the ADF4001. They would like to know what is the default output for MUXOUT? The onchip mux is controled by M3, M2 and M1 and has a reference truth table on Table V in the datasheet. There is, however, no mention of the default values. If the default value is AVDD or one of divider outputs or serial data out, then my customer will have to adjust their FPGA design to accommodate.
I will be recommending the ADF4002 moving forward and I believe the same question applies to this as well as there is no mention of default values.