Silicon Laboratories SI4730 User Manual

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
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
processor for the European Radio Data System (RDS) and
the North American Radio Broadcast Data System (RBDS)
including all required
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.
FM / SW
R IN
A N T
LIN
FM I
LN A
AG C
A M I
AM / LW
A N T
LN A
R FG N D
AG C
2.7~5.5 V (Q FN )
2.0~5.5 V (S SO P )
VA
LD O
+
G ND
AM/FM Receiver
includes advanced seek
an advanced digital
symbol decoding, block
Si473x-D 60
R D S
(Si4731)
LO W -IF
A D C
M u x
DS P
A D C
M u x
C O N TR O L
A FC
IN TER FA C E
Copyright © 2010 by Silicon Laboratories
Broadcast AM/FM Radio Receiver
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
D OU T
D IG ITA L
D FS
A U D IO
G PO /D C LK
D A C R OU T
D A C LO U T
VD
1.62 - 3.6 V
Si4730/31-D60
Pin Assignments
Si473x (QFN)
20 19 18 17
NC 1 16
FMI 2 15 DIN
RFGND 3 GND 14 LOUT/DFS
PAD
AMI 4 13 ROUT/DOUT
RST 5 12 GND
6 11 VDD
7 8 9 10
Si473x (SSOP)
DOUT/[RIN] 1 24 LOUT/[DFS]
ROUT/[DOUT]
DFS/[LIN] 2 23
GPO3/[DCLK] 3 22 DBYP
GPO2/[INT] 4 21 VA
GPO1 5 20 VD
NC RCLK
6 19
NC 7 18 SDIO
FMI 8 17 SCLK
RFGND 9 16 SEN
NC RST
10 15
NC 11 14 GND
AMI 12 13 GND
9.17.10