DUAL-BAND RF SYNTHESIZER
Si4133 Si4123/22/13/12
D U A L - B A N D R F S Y N T H E S I Z E R W I T H I N TE G R A T E D V C O S F OR W I R E L E S...
Description
Si4133 Si4123/22/13/12
D U A L - B A N D R F S Y N T H E S I Z E R W I T H I N TE G R A T E D V C O S F OR W I R E L E S S C O M M U N I C A T I O N S FEATURES
Dual-band RF synthesizers
RF1:
900 MHz to 1.8 GHz RF2: 750 MHz to 1.5 GHz
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
Pin Assignments
Dual-band communications Digital cellular telephones GSM 850, E-GSM 900, DCS 1800, PCS 1900 Digital cordless phones Analog cordless phones Wireless local loop
Si4133-GT
SCLK SDATA GNDR RFLD
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
SEN VDDI IFOUT GNDI IFLB IFLA GNDD VDDD GNDD XIN PWDN AUXOUT
Description
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 threewire serial interface.
Functional Block Diagram
VDDR
XIN
SDATA
IFOUT
GNDR
Reference Amplifier
Powerdown Control
R
Si4133-GM
SCL...
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