Single chip digital radio receivers support DAB/DAB+

23 April 2013

A trio of single-die radio receiver modules from Silicon Labs supports FM, HD Radio and DAB/DAB+ in portable devices.

Three antenna-input-to-audio-output digital radio receivers were announced at the GlobalPress Summit in California. The Si468x FM receivers consist of the Si4682, which supports FM HD Radio, the Si4684 FM/DAB/DAB+ receiver and the Si4688 FM HD Radio/DAB ad DAB+.
James Stansberry, vice president and general manager Broadcast Products, told conference delegates that it has been specifically designed to be a low power device for tablets, handsets, portable media players and portable navigation device, operating at 60mW for analogue and 95mW for digital, which is claimed to be the lowest power consumption available in the market today. It meets the in-cabin temperature operating range for the automotive market and, he added, the digital fault coverage meets the automotive industry’s JEDEC standard. 
The receivers support auto-calibrated digital tuning and FM-seek function based on multiple signal quality and band parameters. Audio processing features including noise blanking, configurable FM soft mute, FM de-emphasis and FM hi-cut filtering.
The 1.8V device has a proprietary core and uses Tensilica vector technology. The devices integrate many external components such as the RF tuner, baseband and stereo audio DACs. The inclusion of the RF tuner and baseband functions avoid radio self-interference as well as streamlines design, validation and test.
This level of integration also reduces board space to allow for digital radio to be used in more applications, such as clocks and tabletop radios and docks, boom boxes and mini or micro systems.
The receivers support worldwide analogue FM radio reception and incorporate an integrated decoder for the European RDS (Radio Data System) and North American RBDS (Radio Broadcast Data System) standards including symbol decoding, block synchronisation, error detection and error correction functions.
The receivers are offered in WLCSP (3.2x3.8mm) and QFN (7x7mm) packages. They are also available as standalone modules through the company’s module partners.

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