SI4122G Datasheet, PDF (1/32 Pages) Silicon Laboratories – DUAL-BAND RF SYNTHESIZER WITH INTEGRATED VCOS FOR GSM AND GPRS WIRELESS COMMUNICATIONS

Si4133G
Si4123G/22G/13G/12G
DUAL-BAND RF SYNTHESIZER WITH INTEGRATED VCOS
FOR GSM AND GPRS WIRELESS COMMUNICATIONS
Features
! Dual-Band RF Synthesizers !
" RF1: 900 MHz to 1.8 GHz
!
" RF2: 750 MHz to 1.5 GHz
!
! IF Synthesizer
!
" IF: 500 MHz to 1000 MHz
!
! Integrated VCOs, Loop Filters, !
Varactors, and Resonators !
! Minimal External Components
Required
Fast Settling Time: 140 µs
Low Phase Noise
Programmable Power Down Modes
1 µA Standby Current
18 mA Typical Supply Current
2.7 V to 3.6 V Operation
Packages: 24-Pin TSSOP and
28-Pin MLP
Si4133G-BT
Ordering Information:
See page 28.
Applications
! GSM, DCS1800, and PCS1900 ! GPRS Data Terminals
Cellular Telephones
! HSCSD Data Terminals
Description
The Si4133G is a monolithic integrated circuit that performs both IF and
dual-band RF synthesis for GSM and GPRS wireless communications
applications. The Si4133G includes three VCOs, loop filters, reference and
VCO dividers, and phase detectors. Divider and power down settings are
programmable through a three-wire serial interface.
Functional Block Diagram
X IN
PW DNB
SDATA
SCLK
SENB
AUXOUT
R e fe re n ce
A m p lifie r
Power
Down
C o n tro l
÷ 65
S e ria l
Interface
2 2 -b it
D a ta
R e g iste r
Test
Mux
Phase
D e te cto r
÷N
RF1
Phase
D e te cto r
÷N
RF2
Phase
D e te cto r
IF
÷N
RFLA
RFLB
RFOUT
RFLC
RFLD
IFO U T
IFLA
IFLB
Pin Assignments
Si4133G-BT
SCLK
1
SD ATA
2
GNDR
3
RFLD
4
RFLC
5
GNDR
6
RFLB
7
RFLA
8
GNDR
9
GNDR
10
RFOUT
11
VDDR
12
24
SENB
23
VDDI
22
IF O U T
21
GNDI
20
IFLB
19
IFLA
18
GNDD
17
VDDD
16
GNDD
15
XIN
14
PWDNB
13
AUXOUT
Si4133G-BM
28 27 26 25 24 23 22
GNDR 1
21 GNDI
RFLD 2
20 IFLB
RFLC 3
19 IFLA
GNDR 4
18 GNDD
RFLB 5
17 VDDD
RFLA 6
16 GNDD
GNDR 7
8
15 XIN
9 10 11 12 13 14
Rev. 1.1 4/01
Patents pending
Copyright © 2001 by Silicon Laboratories
Si4133G-DS11