Broadcast Audio Solutions

HIGHLY INTEGRATED AND EASY TO IMPLEMENT

SINGLE - CHIP SOLUTIONS

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.

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

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

F E A T U R E S

Superior Sound

• Worldwide FM band support (64–108 MHz)

• Worldwide AM band

support (520–1720 kHz) www.silabs.com/audio

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

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

SOLUTIONS GUIDE

HIGHLY INTEGRATED

BEST-IN-CLASS PERFORMANCE

EASIEST TO DESIGN

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Silicon Laboratories SI47XX manual O D U C T D E S C R I P T I O N, A T U R E S, P L I C a T I O N S

SI47XX specifications

Silicon Laboratories SI47XX series is a highly versatile family of single-chip FM radio receivers designed for various consumer and industrial applications. These devices showcase a range of advanced features and technologies, making them suitable for use in portable audio devices, automotive infotainment systems, and smart home devices.

One of the standout features of the SI47XX is its exceptional reception sensitivity, allowing for optimal performance even in challenging environments. This is achieved through a sophisticated digital signal processing architecture that effectively reduces noise and enhances signal clarity. The SI47XX also incorporates a built-in phase-locked loop (PLL) for precise frequency tuning and stability, ensuring users can enjoy uninterrupted radio reception.

The series supports a wide frequency band, covering FM, AM, and various other modulation schemes, depending on the specific model. This flexibility in tuning enables designers to cater to diverse global radio standards, making the SI47XX ideal for international products. Additionally, the integrated capabilities of these chips allow for easy interfacing with microcontrollers or digital signal processors, streamlining development and reducing overall system complexity.

Another significant advantage of the SI47XX is its low power consumption. This characteristic is crucial for portable applications where battery life is a top concern. The device can operate in various power modes that allow the system to conserve energy without sacrificing performance. As a result, manufacturers can design more efficient devices that prolong operation time between charges.

The SI47XX series also boasts a rich feature set, including RDS/RBDS support, which enables the delivery of additional information such as song titles, artist names, and traffic updates directly through the audio stream. This capability enhances the user experience by providing valuable context about the programming being listened to.

Furthermore, the devices are equipped with advanced tuning algorithms and filters that provide superior selectivity, enabling users to receive weaker signals without interference from adjacent channels. As a result, the SI47XX series stands out as an innovative solution for developers aiming to create high-quality radio functionality within their products.

In summary, Silicon Laboratories SI47XX offers an impressive blend of performance, flexibility, and energy efficiency. Its advanced features, including exceptional sensitivity, low power operation, and support for various radio standards, make it an attractive choice for a wide array of applications in the ever-evolving world of wireless communication and entertainment.