Silicon Laboratories Stereo Receiver SI47XX User Manual

Broadcast Audio Solutions  
HIGHLY INTEGRATED AND EASY TO IMPLEMENT  
Superior Sound  
F E A T U R E S  
SINGLE-CHIP SOLUTIONS  
• Worldwide FM band  
support (64–108 MHz)  
• Worldwide AM band  
support (520–1720 kHz)  
• Shortwave band support (2.3–26.1 MHz)  
• Longwave band support (153–279 kHz)  
• Weather band support, 1050 Hz warning tone  
detection (162.4–162.55 kHz)  
• Specific Area Message Encode (SAME) support  
• Requires only 2 external components  
• Advanced AM/FM seek tuning  
• PCB trace/integrated antenna support for  
FM receive and transmit  
• Excellent receive overload immunity  
• Adaptive noise suppression  
• Programmable audio characteristics  
• Digital stereo modulator/demodulator  
• Programmable transmit level  
P R O D U C T D E S C R I P T I O N  
Silicon Laboratories’ family of Si47xx broadcast audio solutions is the industry’s first to  
leverage digital integration and 100% CMOS, resulting in a completely integrated solution  
that requires only two external components and less than 15 mm² of board space. Offering  
unmatched integration, the Si47xx family enables FM transmission and AM, FM, shortwave,  
longwave and weather band radio reception in any device. Leveraging Silicon Labs’ proven  
digital low intermediate frequency (low-IF) receiver architecture and frequency synthesizer  
technology, the Si47xx family delivers superior RF performance and interference rejection.  
Digital signal processing is utilized to provide optimum sound quality under varying  
reception conditions. The high level of integration and simplified bill of materials (BOM)  
enable on-board production testing, increased quality, and improved manufacturing.  
The Si47xx family also uses a streamlined programming model, which further reduces  
development time. Having shipped millions of devices worldwide, the proven products of  
the Si47xx family are ready to be integrated into any portable device.  
• Line-level analog input/output  
• Digital FM TX gain compression  
• Digital audio interface  
• Frequency synthesizer with integrated VCO  
• Programmable reference clock  
• Pb-free and RoHS compliant  
A P P L I C A T I O N S  
• Cellular handsets/hands free  
• Portable media players and accessories  
• Consumer electronics  
• Navigation devices  
• Satellite radios  
• AM/FM portable and table radios  
M O S T I N N O V A T I V E B R O A D C A S T S O L U T I O N S  
• First AM/FM digital CMOS solution family  
SOLUTIONS GUIDE  
HIGHLY INTEGRATED  
BEST-IN-CLASS PERFORMANCE  
EASIEST TO DESIGN  
• First, and smallest, FM transceiver (receive and transmit)  
• First to support small integrated antennas for FM receive and transmit  
• World’s smallest FM receiver footprint  
• First AM/FM IC with RDS  
• First AM/FM IC with no manual alignment required  
• First multi-band support for AM/FM/SW/LW and WB  
• First footprint compatible family of broadcast audio products  
• Highest level of integration  
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