Is it SiGe-Bicmos or just RF cmos ?
AD9864
Production
The AD9864 is a general-purpose IF subsystem that digitizes a
low level, 10 MHz to 300 MHz IF input with a signal bandwidth
ranging from 6.8 kHz to 270...
Datasheet
AD9864 on Analog.com
Is it SiGe-Bicmos or just RF cmos ?
Why not CMOS ?
because of the architecture and the performance requirements