SI4123 - Silicon Laboratories

SI4123 DUAL-BAND RF SYNTHESIZER

http://www.DataSheet4U.net/ RFLC GNDR RFLB RFLA GNDR GNDR RFOUT The Si4133 is a monolithic integrated circuit that performs both IF and dualband RF synthesis for wireless communications applications. The Si4133 includes three VCOs, loop filters, reference and VCO dividers, and phase detectors. Divider and powerdown settings are programmable with a threewir.

Features

 Dual-band RF synthesizers
RF1:
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 900 MHz to 1.8 GHz
RF2: 750 MHz to 1.5 GHz
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 IF synthesizer
IF: 62.5 to 1000 MHz Integrated VCOs, loop filters,
 varactors, and resonators Minimal (2) number of external components required Low phase noise Programmable powerdown modes 1 µA standby current 18 mA typical supply current 2.7 to 3.6 V operation Packages: 24-pin TSSOP, 28-lead QFN
Lead-free Ordering Information: See page 31. and RoHS compliant Applications
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 Pin Assignments Dual-band communications Digital cellular telephones GSM 850, E-GSM 900, DCS 1800, PC.