SI2200

www.DataSheet4U.com Si2200 RF SYNTHESIZER WITH INTEGRATED VCOS FOR SATELLITE RADIO Features ! Dual-band RF synthesizers " " ! ! ! ! ! ! RF1: 2300 to 2500 MHz RF2: 2025 to 2300 MHz 62.5 to 1000 MHz ! ! IF synthesizer " Integrated VCOs, loop filters, varactors, and resonators Minimal external components required Low phase noise 5 µA standby current 25.7 mA typical supply current 2.9 to 3.6 V operation 28-lead QFN " Ordering Information: See page 28. Lead-Free and RoHS Compliant Applications ! Pin Assignments Satellite Radio Si2200-GM Description The Si2200 is a monolithic integrated circuit that performs both IF and RF synthesis for wireless communications applications. The Si2200 includes three VCOs, loop filters, reference and VCO dividers, and phase detectors. Divider and powerdown settings are programmable through a three-wire serial interface. SDATA IFOUT SCLK VDDI GND SEN GND 28 27 26 25 24 23 22 GND GND NC 1 2 3 4 5 6 7 8 GND 21 20 19 GND IFLB IFLA GND VDDD GND XIN Functional Block Diagram GND NC GND GND 18 17 16 15 XIN Reference Amplifier Power Down Control ÷1/÷2 ÷RRF1 Phase Detect RF1 GND 9 GND 10 11 12 13 14 AUXOUT PWDN RFOUT VDDR GND PWDN ÷NRF1 ÷RRF2 Phase Detect ÷2 RFOUT SDATA SCLK SEN Serial Interface 22-bit Data Register RF2 ÷NRF2 ÷RIF Phase Detect ÷2 Patents pending IFDIV IFOUT AUXOUT Test Mux IF ÷NIF IFLA IFLB Rev. 1.0 5/05 Copyright © 2005 by Silicon Laboratories Si2200 www.DataSheet4U.com Si2200 2 Rev. 1.0 ...