SKY73112

• Wideband frequency operation: 750 to 850 MHz
• Process-tolerant compensation for VCO
• 24-bit sigma-delta fractional-N synthesizer
• Three-wire serial interface up to 20 MHz clock frequency
• Integated PLL supply regulation for spur isolation

750-850 MHz High Performance VCO/Synthesizer With Integrated Switch for GSM Applications

The SKY73112 VCO/Synthesizer is a fully integrated, high performance signal source for high dynamic range transceivers. The device provides ultra-fine frequency resolution, fast switching speed, and low phase noise performance for 2G, 2.5G, and 3G base station transceivers.

The SKY73112 is a key building block for high performance radio system designs that require low power and a fine step size. Reference clock generators with an output frequency up to 52 MHz can be used with the SKY73112. The input clock frequency is divided down by programmable dividers (1 to 8) for the synthesizer. The phase detector can operate at a maximum speed of 26 MHz, which allows better phase noise due to the lower division value.