Si4730/31

The Si4730/31 ICs are the industry's first fully integrated, 100% CMOS AM/FM radio receivers. The Si4730/31 AM/FM radio ICs provide 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.

The Si473x-D60 devices are the industry’s first integrated AM/FM tuners with an AUXIN ADC. The Si473x-D60 tuners offer unparalleled integration, audio quality and performance for consumer audio applications that require low power dissipation, minimal board area and exceptional audio processing.

Offering unmatched integration and PCB space savings, the Si4730/31 ICs require only two external components and less than 15 mm² of board area. The Si473x-D60 tuners offer a stereo analog input and internal ADCs multiplexed with the radio tuner front-end to support auxiliary analog system inputs without the need for additional external ADCs.

Features

Worldwide FM band support (76–108 MHz)
Worldwide AM band support (520–1710 kHz)
AM/FM digital tuning
Few external components required
No manual alignment required
Adjustable AM channel filters
Advanced AM/FM seek tuning

Applications

Technologies

Frequency synthesizer with integrated VCO
AM ferrite loopstick and air loop antenna support
Pb-free/RoHS compliant

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Data Sheet (5)

Document Name	Description	Version	Last Updated
Not-Rec-for-New-Designs Si4730-31-A10.pdf	Si4730/31-A10 Data Sheet—EOL—Not Recommended for New Designs – Please Use Si4730-31-34-35-D60	1.0	9/28/2011
Si4730-31-34-35-D60.pdf	Si4730-31-34-35-D60 Data Sheet—Ideal for Consumer Electronics (CE). Please use Si4730-31-D50 for Mobile Devices.	1.1	11/28/2011
Not-Rec-for-New-Designs Si4730-31-B20.pdf	Si4730-31-B20 Data Sheet—EOL—Not Recommended for New Designs – Please Use Si4730-31-34-35-D60	1.0	9/28/2011
Not-Rec-for-New-Designs Si4730-31-C40.pdf	Si4730-31-C40 Data Sheet—EOL—Not Recommended for New Designs—Please Use Si4730-31-34-35-D60	1.0	12/3/2009
Si4730-31-D50.pdf	Si4730-31-D50 Data Sheet—Ideal for Handsets only. Please Use Si4730-31-34-35-D60 for CE devices.	1.0	9/28/2011

Data Short (1)

Document Name	Description	Version	Last Updated
Si4730-31_short.pdf	Si4730-31 Data Short	09.17.10	9/22/2010

User Guides (3)

Document Name	Description	Version	Last Updated
Si4731DEMO.pdf	Si4731 Demo User's Guide	0.1	9/26/2008
Si4731DEMO_Chinese.pdf	Si4731 Demo User's Guide--Chinese Version	0.1	9/26/2008
Si47xxEVB.pdf	Si47xx-EVB User Guide	0.8	2/8/2012

Application Notes (7)

Document Name	Description	Version	Last Updated
AN299.pdf	AN299: External 32.768 kHz Crystal Oscillator	0.1
AN316.pdf	AN316: AM/FM Tuner Field Test Procedure	0.2
AN332.pdf	AN332: Si47xx Programming Guide	0.8	12/1/2011
AN346_Chinese.pdf	AN346: Si47xx Evaluation Board Quick Start Guide (Chinese)	0.1 (Chines4)
AN346.pdf	AN346: Si47xx Evaluation Board Quick-Start Guide	0.1
AN383.pdf	AN383: Si47xx Antenna, Schematic, Layout and Design Guidelines	0.6	12/3/2011
AN388.pdf	AN388: Si470/1x/2x/3x/4x Evaluation Board Test Procedure	0.2

White Papers (1)

Document Name	Description	Version	Last Updated
FMTutorial.pdf	FM Tutorial	092608	9/26/2008

PCN (4)

Document Name	Description	Version	Last Updated
1105171 Si4704 05 06 30 31 34 35 to revD std.pdf	1105171 Si4704 05 06 30 31 34 35 to revD std
1110251 Si47xx-B20 B30 B31 C40 D50 D60 3x3mm QFN Change to Copper Wire in ASEKR std.pdf	1110251 Si47xx-B20 B30 B31 C40 D50 D60 3x3mm QFN Change to Copper Wire in ASEKR std
1205111B Si4704-05-30-31-34-35 datasheet rev 10 to 11.pdf	1205111B Si4704-05-30-31-34-35 datasheet rev 10 to 11
1104011-Cancelled-ASEKR Die Bond Adhesive – Japan Earthquake and Tsunami Disaster Recovery.pdf	Cancelled-ASEKR Die Bond Adhesive – Japan Earthquake and Tsunami Disaster Recovery

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Software (1)

Document Name	Description	Version	Updated
AN332_Si47xxExampleCode.zip	AN332SW	0.3	1/24/2009

Training (2)

Document Name	Description	Version	Updated
Si473x_Presentation.pdf	Introducing the Si473x Multiband Receiver Family
Minimize BOM webinar.pdf	Minimize Your BOM Cost

Product Matrix

Part Number		Available Documents	Description	Dig I/O	RDS Support
Si4730		Data Sheet	AM/FM Receiver	Yes	No
Si4731		Data Sheet	AM/FM Receiver with RDS	Yes	Yes

Leveraging Silicon Labs' proven and patented Si4700/01 FM digital receiver architecture, the Si4730/31 ICs deliver superior RF performance and interference rejection in both AM and FM bands. The high integration and complete system production test simplify design-in, increase system quality and improve manufacturability.

The Si4730/31 ICs include advanced seek algorithms, adjustable soft mute, auto-calibrated digital tuning and FM stereo processing. In addition, the Si4730/31 ICs provide a programmable reference clock, I²C-compatible 2-wire control interface and a Si4700/01 backwards-compatible 3-wire control interface.

The Si4730/31 tuners use digital processing to achieve high fidelity, optimal performance and design flexibility. The devices provide 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 incorporates a digital processor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS) including all required symbol decoding, block 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.

Training & Resources

Featured Videos

Class D Audio Driver and Reference Design
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.
» Class D Audio Sound Quality Demo

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.
» Key Requirements for Multi-Tuner Automotive Radio 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.
» Designing Wheel-Tuned, Digital-Display Radios with Next-Generation Radio ICs
» 轮调数显收音机系统设计要素

Featured Tutorials and Presentations

Si473x 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.
» Si473x Multiband Receiver Family Overview

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.
» High-Performance FM RDS Data Receiver ICs

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Audio and Video Training & Resources

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Si4730/31 AM/FM Radio Receiver ICs

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Applications

Technologies