RF SYNTHESIZER WITH INTEGRATED VCOS INTEGRATED VCOS
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Si2200
RF SYNTHESIZER WITH INTEGRATED VCOS FOR SATELLITE RADIO
Features
!
Dual-band RF synthesize...
Description
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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
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Si2200
2
Rev. 1.0
...
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