2·7GHz I2C Bus Low Phase Noise Synthesiser

The SP5659 is a single chip frequency synthesiser designed for tuning systems up to 2·7GHz.
The RF preamplifier drives a divide-by two prescaler which can be disabled for applications up to 2GHz, allowing direct interfacing with the programmable divider, resulting in a step size equal to the comparison frequency. For applications up to 2·7GHz the divide-by two is enabled to give a step size of twice the comparison frequency.

FEATURES
■ Complete 2·7GHz Single Chip System
■ Optimised for Low Phase Noise
■ Selectable 42 prescaler
■ Selectable Reference Division Ratio
■ Selectable Reference/Comparison Frequency Output
■ Selectable Charge Pump Current
■ Varactor Drive Amplifier Disable
■ 5-Level ADC
■ Variable I2C BUS Address for Multi-tuner Applications
■ ESD Protection: 4kV, Mil-Std-883C, Method 3015 (1)
■ Pin Compatible with SP5658

APPLICATIONS
■ Satellite TV
■ High IF Cable Tuning Systems