Si4702/03
Broadcast FM Radio Tuner for Portable Applications
Description
The Si4702/03 extends Silicon Laboratories Si4700 FM tuner
family, and further increases the ease and attractiveness of
adding FM radio reception to mobile devices through small size
and board area, minimum component count, flexible
programmability, and superior, proven performance. Si4702/03
software is backwards compatible to existing Si4700/01 FM tuner
designs and leverages Silicon Laboratories' highly successful
and patented Si4700/01 FM tuner. The Si4702/03 benefits from
proven digital integration and 100% CMOS process technology,
resulting in a completely integrated solution. It is the industry's
smallest footprint FM tuner IC requiring only 10 mm
2
board
space and one external bypass capacitor.
The device offers significant programmability. It can be adapted
to subjective listening requirements, and it allows adjustability in
important parameters such as seek/tune, allowing the Si4702/03
to outperform other solutions by finding more valid stations and
not stopping on frequencies that do not have a radio station.
The Si4703 incorporates a digital processor for the European
Radio Data System (RDS) and the US Radio Broadcast Data
System (RBDS) including all required symbol decoding, block
synchronization, error detection, and error correction functions.
RDS enables data such as station identification and song name
to be displayed to the user. The Si4703 offers a detailed RDS
view and a standard view, allowing adopters to selectively
choose granularity of RDS status, data, and block errors. Si4703
software is backwards compatible to the proven Si4701, adopted
by leading cell-phone and MP3 manufacturers world-wide.
The Si4702/03 is based on the superior, proven performance of
Silicon Laboratories' Aero architecture offering unmatched
interference rejection and leading sensitivity. The device uses
the same programming interface as the Si4700/01 and supports
multiple bus-modes. Power management is also simplified with
an integrated regulator allowing direct connection to a 2.7 to
5.5 V battery.
The Si4702/03 device’s high level of integration and complete
FM system production testing increases quality to
manufacturers, improves device yields, and simplifies device
manufacturing and final testing.
Features
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Worldwide FM band support (76–108 MHz)
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3x3 mm 20-pin QFN package
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Pb-free/RoHS compliant
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Digital low-IF receiver
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Frequency synthesizer with integrated VCO
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Seek tuning
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Automatic frequency control (AFC)
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Automatic gain control (AGC)
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Excellent overload immunity
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Signal strength measurement
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Programmable de-emphasis (50/75 µs)
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Adaptive noise suppression
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Volume control
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Line-level analog output
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32.768 kHz reference clock
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RDS/RBDS processor (Si4703 only)
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2-wire and 3-wire control interface
-
2.7 to 5.5 V supply voltage
-
Integrated LDO regulator allows direct connection
to battery
Applications
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-
-
-
-
-
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Cellular handsets
MP3 players
PDAs, Notebook PCs
Portable radios
Portable navigation
Automobile applications
Consumer electronics
USB FM radios
Headphone
Cable
FMIP
RFGND
LNA
PGA
Q
ADC
I
ADC
Si4702/03
DAC
FILTER
DEMOD
MPX
AUDIO
DAC
ROUT
AGC
32.768 kHz
0 / 90
LOW-IF
GPIO
GPIO
VIO
CONTROL
INTERFACE
RCLK
2.7–5.5 V
VA
VD
TUNE
AFC
RDS
(Si4703)
RST
SDIO
SCLK
SEN
REG
XTAL
OSC
RSSI
FM Tuner
Copyright © 2006 by Silicon Laboratories
CONTROLLER
AMPLIFIER
DSP
LOUT
8.10.06
SILABS [ SILICON LABORATORIES ]
