Which of the analog ICs is best Suited for Designing 0.5-2 GHz Frequency Synthesizer?
What is the application? What are your system requirements?
Channel spacing? Phase noise? Locking time?
Here are some parts to get you started:
Best performance integer-N PLL: ADF4106
Best performance fractional-N PLL: ADF4150
Integrated PLL and VCO: ADF4351 - integrated VCO means less board space is required and you don't need to find a suitable VCO.
These all operate from 0.5 - 2 GHz.
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