SI4730-D50 Datasheet, PDF (1/34 Pages) Silicon Laboratories – BROADCAST AM/FM RADIO RECEIVER

Si4730/31-D50
BROADCAST AM/FM RADIO RECEIVER
Features
 Worldwide FM band support
(64–108 MHz)
 Worldwide AM band support
(520–1710 kHz)
 Excellent real-world performance
 Integrated VCO
 Advanced AM/FM seek tuning
 AM/FM digital tuning
 Automatic frequency control (AFC)
 Automatic gain control (AGC)
 Digital FM stereo decoder
 Programmable AVC max gain
 Programmable de-emphasis
 Seven selectable AM channel filters
 Advanced audio processing
 No manual alignment necessary
 Programmable reference clock
 Volume control
 Adjustable soft mute control
 RDS/RBDS processor (Si4731 only)
 I²S digital audio out
 2-wire and 3-wire control interface
 Integrated LDO regulator
 Wide range of ferrite loop sticks and
air loop antennas supported
 QFN package
 RoHS compliant
 Not suitable for wall-plugged
consumer electronic applications*
*Note: For consumer electronics applications, use Si4730/31-D60 for worldwide
CE and EN compliance.
Applications
 Cellular handsets
 MP3 players
 Portable navigation
Description
 Mobile Internet Devices  Tablets
 USB FM radio
 eBooks
The Si4730/31-D50 is the fourth generation digtial CMOS AM/FM radio receiver
IC from Silicon Labs. The Si4730/31-D50 integrates the complete tuner function
from antenna input to audio output.
Functional Block Diagram
AMI
AM
ANT
RFGND
FM
ANT
FMI
2.7– 5.5 V _VA
GND
LNA
AGC
LNA
AGC
LDO
Si473x
RDS
(Si4731)
LOW-IF
DIGITAL
AUDIO
DOUT
DFS
GPO/DCLK
ADC
DAC
DSP
ADC
DAC
ROUT
LOUT
AFC
CONTROL
INTERFACE
VD
1.62–3.6 V
Ordering Information:
See page 26.
Pin Assignments
Si4730/31
NC 1
FMI 2
RFGND 3
AMI 4
RST 5
6
20 19 18 17
GND
PAD
7 8 9 10
16
15 DOUT
14 LOUT
13 ROUT
12 GND
11 VA
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.
Rev. 1.0 2/11
Copyright © 2011 by Silicon Laboratories
Si4730/31-D50