SI4136 Datasheet, PDF (1/30 Pages) Silicon Laboratories – ISM RF SYNTHESIZER WITH INTEGRATED VCOS

Si4136
ISM RF SYNTHESIZER WITH INTEGRATED VCOS
FOR WIRELESS COMMUNICATIONS
Features
! Dual-Band RF Synthesizers ! Minimal External Components
" RF1: 2300 MHz to 2500 MHz
Required
" RF2: 2025 MHz to 2300 MHz ! Low Phase Noise
! IF Synthesizer
! 5 µA Standby Current
" 62.5 MHz to 1000 MHz
! 25.7 mA Typical Supply Current
! Integrated VCOs, Loop Filters, ! 3.0 V to 3.6 V Operation
Varactors, and Resonators
! Package: 24-pin TSSOP
Applications
! ISM Band Communications
! Wireless LAN and WAN
! Dual-Band Communications
Description
The Si4136 is a monolithic integrated circuit that performs both IF and RF
synthesis for wireless communications applications. The Si4136 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
R efe ren ce
A m p lifier
÷1/÷2
Power
Down
C ontro l
SDATA
SCLK
SENB
Serial
In te rfa ce
22-bit
D a ta
Register
AUXOUT
Test
Mux
÷ R_RF1
÷ R_RF2
÷ R_IF
Phase
D e te ct
Phase
D e te ct
Phase
D e te ct
÷ N_RF1
÷ N_RF2
÷ N_IF
RF1
÷2
RF2
÷2
IF
IF D IV
RFOUT
IF O U T
IF L A
IF L B
Ordering Information:
See page 28.
Pin Assignments
Si4136
SCLK 1
SDATA
2
GNDR 3
GNDR 4
NC 5
GNDR 6
NC 7
GNDR 8
GNDR 9
GNDR 10
RFOUT 11
VDDR 12
24 SENB
23 VDDI
22 IFOUT
21 GNDI
20 IFLB
19 IFLA
18 GNDD
17 VDDD
16 GNDD
15 XIN
14 PWDNB
13
AUXOUT
Patents pending
Rev. 1.0 12/00
Copyright © 2000 by Silicon Laboratories
Si4136-DS10