Frequently Asked Question
How do I use a VCO with a supply greater than 5V?
The AD9510/11 parts allow the use of a Vcp up to 5V. To use VCOs which require tuning voltages greater than 5V an active loop filter must be used. This architecture makes use of op amps which can provide higher voltage output levels, but require an additional power supply voltage. A caveat though: active loop filters tend to be much noisier than passive loop filters and can contribute to higher jitter levels.