Silicon Laboratories SI4734/35-B20 - Manual

Rev. 1.0 4/08 Copyright © 2008 by Silicon Laboratories Si4734/35-B20
S i 4 7 3 4 / 3 5 - B 2 0
B
R O A D C A S T
A M / F M / S W / LW R
A D I O
R
E C E I V E R
Features
Applications
Description
The Si4734/35 is the first digital CMOS AM/FM/SW/LW radio receiver IC that
integrates the complete tuner function from antenna input to audio output.
Functional Block Diagram
„ Worldwide FM band support
(64–108 MHz)
„ Worldwide AM band support
(520–1710 kHz)
„ SW band support (2.3–21.85 MHz)
„ LW band support (153–279 KHz)
„ Excellent real-world performance
„ Freq synthesizer with integrated VCO
„ Automatic frequency control (AFC)
„ Automatic gain control (AGC)
„ Integrated LDO regulator
„ Digital FM stereo decoder
„ Programmable de-emphasis
„ Adaptive noise suppression
„ AM/FM/SW/LW digital tuning
„ No manual alignment necessary
„ Adjustable channel filters
„ EN55020 complaint
„ Programmable reference clock
„ Digital volume control
„ Adjustable soft mute control
„ RDS/RBDS processor (Si4735 only)
„ Optional digital audio out (Si4735 only)
„ 2-wire and 3-wire control interface
„ 2.7 to 5.5 V supply voltage
„ Wide range of ferrite loop sticks and air
loop antennas supported
„ 3 x 3 x 0.55 mm 20-pin QFN package
z Pb-free/RoHS compliant
„ Table and portable radios
„ Stereos
„ Mini/micro systems
„ CD/DVD players
„ Portable media players
„ Boom boxes
„ Cellular handsets
„ Modules
„ Clock radios
„ Mini HiFi
„ Entertainment systems
ADC
ADC
Si4734/35
DSP
DAC
DAC
FMI
FM / SW
ANT
VIO
1.5-3.6V
SC
LK
SDIO
CONTROL
INTERFACE
SEN RS
T
ROUT
LOUT
LDO
VDD
GND
2.7 - 5.5 V
RDS
(Si4735)
AM / LW
ANT
RFGND
AMI
LNA
LNA
LOW-IF
DIGITAL
AUDIO
(Si4735)
DOUT
DFS
GPO/DCLK
AGC
AGC
AFC
RC
LK
Patents pending
Notes:
1. To ensure proper operation and
receiver performance, follow the
guidelines in “AN383: Antenna
Selection and Universal Layout
Guide.” Silicon Laboratories will
evaluate schematics and layouts for
qualified customers.
2. Place Si4734/35 as close as
possible to antenna jack and keep
the FMI and AMI traces as short as
possible.
Ordering Information:
See page 31.
Pin Assignments
GND
PAD
1
2
3
17 18 19 20
11
12
13
14
6 7 8 9
4
5
16
10
15
GP
O
2/IN
T
VIO
DOUT
LOUT
ROUT
GND RST
NC
AMI
RC
LK
SDI
O
VDD
FMI
RFGND
GP
O
3/D
CL
K
NC GP
O
1
DF
S
SC
LK
SE
N
Si4734/35-GM
(Top View)