SI4133-D-GT Datasheet, PDF (1/36 Pages) Silicon Laboratories – DUAL-BAND RF SYNTHESIZER WITH INTEGRATED VCOS FOR WIRELESS COMMUNICATIONS

Si4133
Si4123/22/13/12
DUAL-BAND RF SYNTHESIZER WITH INTEGRATED VCOS
FOR WIRELESS COMMUNICATIONS
FEATURES
 Dual-band RF synthesizers  Low phase noise
RF1: 900 MHz to 1.8 GHz
 Programmable powerdown modes
RF2: 750 MHz to 1.5 GHz
 1 µA standby current
 IF synthesizer
 18 mA typical supply current
IF: 62.5 to 1000 MHz
 2.7 to 3.6 V operation
 Integrated VCOs, loop filters,  Packages: 24-pin TSSOP,
varactors, and resonators
28-lead QFN
 Minimal (2) number of external Lead-free and RoHS compliant
components required
Applications
 Dual-band communications
 Digital cellular telephones GSM 850, E-GSM 900, DCS 1800,
PCS 1900
 Digital cordless phones
 Analog cordless phones
 Wireless local loop
Description
The Si4133 is a monolithic integrated circuit that performs both IF and dual-
band 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 three-
wire serial interface.
Functional Block Diagram
Ordering Information:
See page 31.
Pin Assignments
Si4133-GT
SCLK
1
SDATA
2
GNDR
3
RFLD
4
RFLC
5
GNDR
6
RFLB
7
RFLA
8
GNDR
9
GNDR
10
RFOUT
11
VDDR
12
24
SEN
23
VDDI
22
IFOUT
21
GNDI
20
IFLB
19
IFLA
18
GNDD
17
VDDD
16
GNDD
15
XIN
14
PWDN
13
AUXOUT
XIN
PWDN
Reference
Amplifier
Powerdown
Control
SDATA
SCLK
SEN
AUXOUT
Serial
Interface
22-bit
Data
Register
Test
Mux
R
Phase
Detector
RF1
N
R
Phase
Detector
RF2
N
R
Phase
Detector
IF
N
IFDIV
RFLA
RFLB
RFOUT
RFLC
RFLD
IFOUT
IFLA
IFLB
Si4133-GM
GNDR
RFLD
RFLC
GNDR
RFLB
RFLA
GNDR
28 27 26 25 24 23 22
1
21 GNDI
2
20 IFLB
3
19 IFLA
4
GND
18 GNDD
Pad
5
17 VDDD
6
16 GNDD
7
15 XIN
8 9 10 11 12 13 14
Rev. 1.61 1/10
Patents pending
Copyright © 2010 by Silicon Laboratories
Si4133