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Single-chip digital radio receivers for consumer electronics

Single-chip digital radio receivers for consumer electronics

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By eeNews Europe



Claimed to be the first single-die antenna-input-to-audio-output digital radio receiver solution developed for the global portable and consumer electronics markets and using software-defined radio technology, the monolithic Si468x receiver ICs bring FM, HD Radio and DAB/DAB+ broadcast capabilities to a wide range of audio applications, from price-sensitive clock and tabletop radios to mainstream mini/micro audio systems and CD boomboxes to high-end multimedia devices with displays such as mobile phones, tablets and personal navigation devices.

Silabs believes that digital radio adoption has been slow due in part to the high cost of delivering a high-performance yet power-efficient RF solution for the consumer electronics market. The Si468x family directly addresses the consumer digital radio market by providing an advanced, single-die solution that reduces system complexity, bill of materials (BOM) count and power consumption without compromising RF performance.

Using the company’s low-IF digital receiver architecture, the Si468x family claims superior RF performance compared to existing consumer-grade digital radio solutions. The receivers support auto-calibrated digital tuning and FM-seek functionality based on multiple signal quality and band parameters and provide flexible audio processing features including noise blanking, configurable FM soft mute, FM de-emphasis and FM hi-cut filtering.

The Si468x family enables developers to reduce system cost, size and complexity by integrating most of the external components needed to build a digital radio receiver system including the RF tuner, baseband and stereo audio DACs. The family’s wafer-level chip-scale package (WLCSP) option supports very compact designs, enabling a complete digital radio receiver system with only 12 external components to be implemented in less than 100 square millimeters.

Receivers are engineered with small form factor designs in mind. By integrating the RF tuner and baseband functions on a single die, the Si468x family avoids radio self-interference and streamlines system design, validation and testing. Offering the smallest footprint and lowest power consumption of any digital radio solution on the market (less than 60 mW in analogue FM mode and less than 95 mW in HD Radio and DAB/DAB+ modes), the Si468x receivers are also a suitable choice for power- and space-sensitive portable applications.

Si468x receivers support worldwide analogue FM radio reception and incorporate an integrated decoder for the European Radio Data System (RDS) and North American Radio Broadcast Data System (RBDS) standards including required symbol decoding, block synchronisation, error detection and error correction functions. The Si468x family includes the first truly monolithic digital radio receiver ICs certified by iBiquity to support the HD Radio standard for portable and consumer electronics applications. The Si468x receiver family is compatible with the European Eureka 147 DAB and DAB+ standards and is designed to be fully compliant with the United Kingdom’s Minimum Specifications for DAB and DAB+ Personal and Domestic Digital Radio Receivers.

Si468x digital radio receivers come in two package options: a 7 x 7 mm 48-pin QFN package and a tiny 3.2 x 3.8 mm WLCSP package. Pricing begins at $5.62 (10,000). A comprehensive evaluation kit is priced at $550.00.

More information; www.silabs.com/FMtuners

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