I'm trying to understand what kind of inputs the ADRF6755 requires. That what the data sheet says:
The baseband inputs, QBB_P, QBB_N, IBB_P, and IBB_N, must be driven from a differential source. The nominal drive level of 0.9 V p-p
differential (450 mV p-p on each pin) should be biased to a common-mode level of 500 mV dc.