Single-chip digital radio receivers support HD Radio and DAB/DAB+

April 23, 2013 // By Julien Happich
Silicon Labs has released what it claims to be the industry's first single-die antenna-input-to-audio-output digital radio receiver solution developed for the global portable and consumer electronics markets.

Leveraging software-defined radio technology, the new monolithic Si468x receiver ICs bring FM, HD Radio and DAB/DAB+ broadcast capabilities to a wide range of audio applications.

Silicon Labs’ 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. The Si468x 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. 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. High integration simplifies board layout, reduces board space requirements and enhances system stability, making the receivers a good fit for on-board and small form factor designs where performance, size and reliability are critical considerations. Offering the smallest footprint and lowest power consumption of any digital radio solution on the market (less than 60 mW in analog FM mode and less than 95 mW in HD Radio and DAB/DAB+ modes), the Si468x receivers are also an ideal choice for power- and space-sensitive portable applications.

The Si468x receivers support worldwide analog 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 synchronization, error detection and error correction functions. The chip is compatible with the