AM/FM Receiver
Copyright © 2010 by Silicon Laboratories
9.17.10
ADC
Si473x-D60
DSP
DAC
LOUT
ROUT
AFC
GPO/DCLK
LDO
VA
2.7~5.5 V (QFN)
2.0~5.5 V (SSOP)
RDS
(Si4731)
AMI
VD
1.62 - 3.6 V
SE
N
CONTROL
INTERFACE
SCLK
LNA
AGC
LNA
AGC
GND
ADC
M u x
M u x
DAC
LOW -IF
SDIO
RST
DIGITAL
AUDIO
DFS
DOUT
LIN
RIN
RC
LK
AM / LW
ANT
RFGND
FMI
FM / SW
ANT
+
Si4730/31-D60
Broadcast AM/FM Radio Receiver
Description
The Si4730/31 is the industry's first fully integrated, 100%
CMOS AM/FM radio receiver IC. The Si4730/31-D60 AM/
FM radio delivers excellent performance and is simple to
design-in. Available in a small 3 x 3 mm QFN package, the
Si4730/31 offers unmatched integration and PCB space
savings with a minimal number of external components
and no factory tuned components.
Leveraging Silicon Laboratories' proven and patented
digital receiver architecture, the Si4730/31 delivers
superior RF performance and interference rejection in both
AM and FM bands. The high integration and complete
system production test simplifies design-in, increases
system quality, and improves manufacturability.
The Si4730/31 solution includes advanced seek
algorithms, multipath detection and mitigation, adjustable
soft mute, FM hi-cut control, smart tune, and FM stereo
processing. In addition, the Si4730/31 provides an auxiliary
input to support a full digital system architecture.
The Si4730/31 utilizes digital processing to achieve high
fidelity, optimal performance, and design flexibility. The
chip provides excellent pilot rejection, selectivity, and
unmatched audio performance, and offers both the
manufacturer and the end-user extensive programmability
and flexibility in listening experience.
The Si4731-D60 incorporates an advanced digital
processor for the European Radio Data System (RDS) and
the North American Radio Broadcast Data System (RBDS)
including all required symbol decoding, block
synchronization, error detection, and error correction
functions. Using this feature, the Si4731 enables broadcast
data such as station identification and song name to be
displayed to the end user.
Features
-
Worldwide FM band support (64–108 MHz)
-
Worldwide AM band support (520–1710 kHz)
-
AM/FM digital tuning
-
EN55020 compliant
-
FM multipath detection and mitigation
-
FM hi-cut control
-
Advanced stereo blend
-
AUXIN stereo ADC
-
No manual alignment required
-
Seven selectable AM channel filters
-
Advanced AM/FM seek tuning
-
Programmable AVC max gain
-
Frequency synthesizer with integrated VCO
-
Automatic frequency control (AFC)
-
Programmable de-emphasis
-
Digital FM stereo decoder
-
Integrated LDO regulator
-
Wide range of ferrite and air loop antennas supported
-
Advanced FM RDS/RBDS processor
-
QFN and SSOP Pb-free/RoHS compliant package
Applications
-
Audio video receivers
-
Mini/micro systems
-
Home theater systems
-
Docking stations
-
Blu-ray / DVD players
-
Table / clock radios
-
Boomboxes
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
DIN
LOUT/DFS
ROUT/DOUT
GND
RST
NC
AMI
RCL
K
SD
IO
VDD
FMI
RFGND
GP
O
3/
D
C
LK
NC
GP
O
1
DF
S
SC
LK
SEN
Si473x (QFN)
Si473x (SSOP)
LOUT/[DFS]
ROUT/[DOUT]
DBYP
VD
GPO2/[INT]
GPO3/[DCLK]
DOUT/[RIN]
DFS/[LIN]
1
2
3
4
5
6
7
8
9
10
11
12
GPO1
VA
SDIO
NC
NC
RCLK
SEN
FMI
RFGND
SCLK
GND
NC
NC
RST
GND
AMI
24
23
22
21
20
19
18
17
16
15
14
13
