What the 1.8 GHz ceiling buys you
The AD9522-4BCPZ is a clock generator and fanout distribution IC from Analog Devices, integrating a PLL to synthesize and distribute low-jitter clocks up to 1.8 GHz. That frequency ceiling covers most RF sampling clocks for ADCs and DACs, baseband clocks for FPGAs, and reference clocks for high-speed SerDes — without needing an external VCXO or PLL chip. The input stage accepts CMOS, LVDS, or LVPECL references, while the outputs are CMOS or LVDS — both differential and single-ended, configurable per bank. The 2:12 or 2:24 input-to-output ratio means you can distribute one reference to 12 or 24 outputs, or two references to 12 outputs each, depending on the divider settings.
Supply rails and thermal — the 64-LFCSP reality
The 64-LFCSP-VQ (9x9) package has an exposed pad that requires a thermal and ground plane for proper heat dissipation and PLL noise isolation.