Si4708/09 Tiny FM Radio Receiver ICs​

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Si4708/09 Block Diagram

​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

  • Cellular handsets
  • MP3 players
  • PDAs, notebook PCs
  • Portable radios
  • Portable navigation
  • Automobile applications
  • Consumer electronics
  • USB FM radios
     

Technologies

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

Documentation    Expand All   Collapse 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 Guide0.84/24/2009
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 Tools​

 

Design Tools    Expand All   Collapse All

 
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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


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.

The 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.

Training & Resources

Featured Videos

Class D Audio Driver and Reference Design
Class D Audio Driver and Reference Design
Si4830 wheel-tuned digital CMOS am/fm radio receiver ic
Si4830 Wheel-Tuned Digital CMOS AM/FM Radio Receiver IC


Featured Web Utilities

Class D Audio Sound Quality Demo

The Class D audio driver interactive demonstration allows you to see the sound quality performance of the Si824x Class D audio driver over the audible spectrum. The demo shows the total harmonic distortion + noise (THD + N) ratio, a universal measure of sound quality for audio amplifiers.


Featured White Papers

Key Requirements for Multi-Tuner Automotive Radio Designs

Automotive OEMs and Tier 1 suppliers understand that consumers expect a superior in-vehicle audio experience and are responding by designing sophisticated infotainment systems. The radio components used in today's vehicles need to be cost-effective while meeting rigorous automotive levels of performance. With the advent of multi-tuner automotive infotainment systems, car radio developers must now consider a wide range of performance requirements and new technologies in their designs.

Designing Wheel-Tuned, Digital-Display Radios with Next-Generation Radio ICs

As a growing number of portable applications such as mobile phones and portable media players integrate the FM radio function, there’s a misconception that traditional radios are no longer needed. In reality, wheel-tuned radios have remained immensely popular. This article will discuss how to design a mid-level wheel-tuned radio with an LCD to display frequencies, and it will explore the practical considerations in selecting audio ICs and display drivers, as well as how to leverage these technologies to deliver the best end-user radio tuning experience. Available in English and Simplified Chinese.


Featured Tutorials and Presentations

Multiband Receiver Family Overview

The Si473x is the industry's first fully integrated, 100% CMOS AM/FM/shortwave/longwave/weather bandradio receiver IC. This family of radio receiverICs provides the space savings and low power consumption necessary for portable devices while delivering the high performance and design simplicity desired for all AM/FM solutions.

Introducing High-Performance FM RDS Data Receiver ICs

The Si4749/06 are 100% CMOS receiver ICs, offering full receive functionality from antenna to RDS/RBDS data for use in the automotive and portable navigation markets. The Si4749/06 is an ideal RDS/RBDS data receiver for Traffic Message Channel (TMC) and Open Data Applications (ODA) applications frequently used in conjunction with GPS functionality.

View all Audio/Video Training & Resources...

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