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