The SP5070 is a single modulus frequency synthesiser for use in Satellite TV receivers and together with an

appropriate voltage controlled oscillator (VCO), forms a complete phase locked loop (PLL) synthesiser. The circuit consists of a prescaler with preamplifier and a fixed modulus divider. The phase comparator is fed with a reference frequency derived from an external oscillator or crystal. The comparator has a charge pump output amplifier stage around which feedback may be applied. Only an external transistor is required for varicap line driving.

FEATURES

■ Low Power Consumption (5V, 47mA typ.)

■ Prescaler and Preamplifier Included

■ Charge Pump Amplifier with Feedback Point

■ Charge Pump Disable Facility

■ Synthesises Frequencies up to 2.4GHz

■ Pin and Function Compatible with SP5060 and SP5062

■ Full ESD Protection*

* Normal ESD handling procedures should be observed.

APPLICATIONS

■ Satellite TV

■ High IF Cable Tuning Systems

■ C-Band with Frequency Doubling Mixer