The SP5658 is a single chip frequency synthesiser designed for tuning systems up to 2.7GHz.

The RF preamplifer contains a divide by two prescaler which can be disabled for applications up to 2GHz so enabling a step size equal to the comparison frequency up to 2GHz and twice the comparison frequency up to 2.7GHz.

FEATURES

■ Complete 2.7GHz single chip system

■ Optimised for low phase noise

■ Selectable divide by two prescaler

■ Selectable reference division ratio

■ Charge pump disable

■ Varactor line disable

■ ‘In–lock’ flag

■ Two switching ports in 14 pin version

■ Four switching ports in 16 pin version

■ Pin compatible with SP5659 I 2 C bus low

phase noise synthesiserPP

■ ESD protection (Normal ESD handling procedures

should be observed)

APPLICATIONS

■ SAT, TV, VCR and Cable tuning systems

■ Communications systems