Si4738/39

The Si4738/39 ICs are the industry's first fully integrated, 100% CMOS AM/FM/WB and FM/WB radio receivers. Offering unmatched integration and PCB space savings, the Si4736/37/38/39 ICs require only two external components and less than 15 mm² of board area, excluding the antenna inputs.

The Si4738/39 AM/FM/WB radio receivers 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/WB solutions.

Leveraging Silicon Labs' proven and patented digital low intermediate frequency (low-IF) receiver architecture, the Si4738/39 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.

Features

Weather band support (162.4–162.55 MHz)
Worldwide FM band support (76–108 MHz)
1050 Hz tone detection
AM/FM/WB digital tuning
No manual alignment necessary
Dynamic channel filters
Advanced AM/FM seek tuning

Applications

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Data Sheet (2)

Document Name	Description	Version	Last Updated
Si4736-37-38-39-B20.pdf	Si4736-37-38-39-B20 Data Sheet – Not Recommended for New Designs – Please Use Si4736-37-38-39-C40	1.0	9/28/2011
Si4736-37-38-39-C40.pdf	Si4736-37-38-39-C40 Data Sheet	1.0	12/3/2009

Data Short (1)

Document Name	Description	Version	Last Updated
Si4736-37-38-39_short.pdf	Si4736-37-38-39 Data Short	01.07.08	9/28/2011

User Guides (1)

Document Name	Description	Version	Last Updated
Si47xxEVB.pdf	Si47xx-EVB User Guide	0.8	2/8/2012

Application Notes (6)

Document Name	Description	Version	Last Updated
AN299.pdf	AN299: External 32.768 kHz Crystal Oscillator	0.1
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 (2)

Document Name	Description	Version	Last Updated
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
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
Si4738		Data Sheet	FM/weather band radio receiver	No	No
Si4739		Data Sheet	FM/weather band radio receiver with RDS	No	Yes

The Si4738/39 is a feature-rich solution including 1050 Hz tone detection, advanced seek algorithms, soft mute, auto-calibrated digital tuning and FM stereo processing. In addition, the Si4738/39 provides analog and digital audio outputs and a programmable reference clock. The device supports I2C-compatible, 2-wire control interface, SPI and a Si4700/01 backwards-compatible, 3-wire control interface.

The Si4738/39 utilizes digital processing to achieve high fidelity, optimal performance and design flexibility. The chip provides 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 Si4739 incorporates a digital processor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS), and includes all required symbol decoding, block synchronization, error detection and error correction functions. Using this feature, the Si4739 enables broadcast data such as station identification and song name to be displayed to the 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

Audio/Video

Title Content
Si4738/39 AM/FM/WB Radio Receiver ICs

Features

Applications