Si4708/09 Tiny FM Radio Receiver ICs​

​As the world's smallest FM receiver solution, the Si4708/09 FM radio receiver ICs extend Silicon Labs' Si4700 FM tuner family and further increases the ease and attractiveness of adding FM radio reception to mobile devices.
​Requiring only 6.25 mm² of board space, the Si4708/09 ICs are the world's smallest FM receivers offering a minimum component count, flexible and proven programmability and superior, proven performance. The Si4708/09 leverage Silicon Labs' highly successful and patented Si4700/01/02/03 FM tuner and are software-compatible to existing Si4700/01/02/03 FM tuner designs. The Si4708/09 ICs benefit from proven digital integration and 100% CMOS process technology, resulting in a completely integrated solution. The Si4708/09 ICs' highly flexible functionality caters to the subjective nature of audio preferences and variable FM broadcast environments worldwide.
 
 

Features

  • Worldwide FM band support (76–108 MHz)
  • Automatic frequency control (AFC)
  • Automatic gain control (AGC)
  • Excellent overload immunity
  • Signal strength measurement
  • Digital low-IF receiver
 
 

Applications

Technologies

  • Digital low-IF receiver
  • Integrated LDO regulator allows direct connection to battery
​

Documentation

Expand AllCollapse All
Get notified when these documents are updated.

Data Sheet (2)

Document NameDescriptionVersionLast Updated
Not-Rec-for-New-Designs-Si4708-09-B.pdf
Si4708-09-B Data Sheet—Not Recommended for New Designs—Please use the Si4708-09-C1.43/3/2010
Si4708-09-C.pdf
Si4708-09-C Data Sheet—Ideal for space-constrained mobile devices such as handsets1.211/22/2011

Data Short (1)

Document NameDescriptionVersionLast Updated
Si4708-09-short.pdf
Broadcast FM Radio Tuner for Portable Applications40208

User Guides (1)

Document NameDescriptionVersionLast Updated
Si47xxEVB.pdf
Si47xx-EVB User Guide0.82/8/2012

Application Notes (8)

Document NameDescriptionVersionLast Updated
AN230.pdf
AN230: Si4700/01/02/03 Programmer's Guide0.94/24/2009
AN235.pdf
AN235: Si4700/01/02/03 Evaluation Board Quick Start Guide0.66/10/2008
AN346-Chinese.pdf
AN346: Si47xx Evaluation Board Quick Start Guide (Chinese)0.1 (Chines4)
AN346.pdf
AN346: Si47xx Evaluation Board Quick-Start Guide0.1
AN349.pdf
AN349: Si4708/09 Programming Guide0.17/11/2008
AN350.pdf
AN350: Si4708/09 Antenna, Schematic, Layout, and Design Guidelines0.210/28/2009
AN383.pdf
AN383: Si47xx Antenna, Schematic, Layout and Design Guidelines0.612/3/2011
AN388.pdf
AN388: Si470/1x/2x/3x/4x Evaluation Board Test Procedure0.2

White Papers (3)

Document NameDescriptionVersionLast Updated
Designing-Car-Radios-with-CMOS-Based-AM-FM-Automotive-Receivers.pdf
Designing Car Radios with CMOS-Based AM/FM Automotive Receivers1.011/21/2011
FMTutorial.pdf
FM Tutorial0926089/26/2008
Automotive-AM-FM-Receiver-Article-SC.pdf
采用基于CMOS技术的AM/FM车用接收器芯片 设计高性能、低成本汽车收音机1.011/21/2011

PCN (4)

Document NameDescriptionVersionLast Updated
1003161-Si4708_Si4709_MOQ_Reel_Size_Change-2.5K_to_5K_Std.pdf
1003161-Si4708/Si4709 MOQ Reel Size Change-2.5K to 5K Std
1104011-Cancelled-ASEKR Die Bond Adhesive – Japan Earthquake and Tsunami Disaster Recovery.pdf
Cancelled-ASEKR Die Bond Adhesive – Japan Earthquake and Tsunami Disaster Recovery
1011191A.pdf
Si4708/09 Revision C Product Announcement Std
1009061.pdf
Si4708/09-B Assy Site Expansion-SPIL Std

Development Kits

Design Tools

Expand AllCollapse All
Get notified when these documents are updated.

Software (2)

Document NameDescriptionVersionUpdated
AN332_Si47xxExampleCode.zip
AN332SW0.31/24/2009
an349sw.zip
AN349SW0.17/11/2008

Training (1)

Document NameDescriptionVersionUpdated
Minimize BOM webinar.pdf
Minimize Your BOM Cost

Product Matrix

Product Matrix
Zoom
Part Number Available DocumentsDescriptionDig I/ORDS Support
Si4708Data Sheet
Data Short
Smallest FM receiversNoNo
Si4709Data Sheet
Data Short
Smallest FM receivers with RDSNoYes
​
​​​The Si4709 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 Si4709 offers both a detailed RDS view and a standard view, allowing adopters to selectively choose granularity of RDS status, data, and block errors. Si4709 software is backwards compatible to the proven Si4701/03, adopted by leading cell-phone, PND and MP3 manufacturers world-wide.
​​​he Si4708/09 devices' high level of integration and complete FM system increase quality to manufacturers, improve device yields and simplify device manufacturing and final testing.

Featured Utilities

  • Class D Audio Demo

    See the sound quality performance of the Si824x Class D audio driver over the audible spectrum.

Featured White Papers

Overview

Documentation

Tools

Product Matrix

Education

More Info