SI4704 Datasheet, PDF (1/36 Pages) Silicon Laboratories – Worldwide FM band support (64-108 MHz) integrated antenna support EN55020 compliant

Si4704/05-C40
BROADCAST FM RADIO RECEIVER FOR CONSUMER
ELECTRONICS
Features
 Worldwide FM band support
 Programmable reference clock
(64–108 MHz)
 Volume control
 Integrated antenna support
 Adjustable soft mute control
 EN55020 compliant
 RDS/RBDS processor (Si4705)
 Excellent real-world performance _{ Optional digital audio out (Si4705)}
 Freq synthesizer with integrated VCO _{ 2-wire and 3-wire control interface}
 Advanced FM seek tuning
 Integrated LDO regulator
 Automatic frequency control (AFC) _{ Signal quality measurements}
 Automatic gain control (AGC)
 2.7 to 5.5 V supply voltage
Designs ^{Ordering Information:}
 Digital FM stereo decoder
 Minimal BOM
w _{ Programmable de-emphasis}
 3x3 mm 20-pin QFN package
 RoHS compliant
e _Applications
N _{ Table and portable radios}
r _{ Stereos}
fo ^{ Mini/micro systems}
 CD/DVD players
d ^{ Boom boxes}
 Modules
 Clock radios
 Mini HiFi
 Entertainment systems
e _Description
d _{The Si4704/05 integrates all functions required for an advanced broadcast FM}
n _{radio receiver, from antenna input to stereo audio output.}
e _{Functional Block Diagram}
See page 28.
Pin Assignments
Si4704/05-GM (Top View)
NC 1 ^{20 19 18 17} 16
FMI 2
15 DOUT
RFGND 3
LPI 4
GND
PAD
14 LOUT
13 ROUT
RST 5
12 GND
6 _{7 8 9 10} 11 VDD
mm _{FM Antenna}
o _FMI
c _RFGND
t ^Re LPI
o _{32.768 kHz}
N^RCLK
Si4704/05
ADC
DAC
LNA
PGA
DSP
ADC
DAC
AGC
0/90
AFC
RSSI
RDS
(Si4705)
LOUT
ROUT
GPO
DCLK
DOUT
This product, its features, and/or its
architecture is covered by one or more of
the following patents, as well as other
patents, pending and issued, both
foreign and domestic: 7,127,217;
7,272,373; 7,272,375; 7,321,324;
7,355,476; 7,426,376; 7,471,940;
7,339,503; 7,339,504.
2.7–5.5 V VDD
REG
XTAL
OSC
CONTROL
INTERFACE
DFS
Rev. 1.0 12/09
Copyright © 2009 by Silicon Laboratories
Si4704/05-C40