Automotive audio bus enables transceiver to deliver 50Mb/s

23rd October 2014
Posted By : Siobhan O'Gorman
Automotive audio bus enables transceiver to deliver 50Mb/s

Capable of distributing audio and control data together with clock and power over a single, unshielded twisted-pair wire, a digital audio bus technology has been introduced by Analog Devices. Providing improved vehicle fuel efficiency while delivering high-fidelity audio, the Automotive Audio Bus (A²B) reduces the weight of existing cable harnesses.

The AD2410 transceiver, which removes the need for expensive MCUs with large memories, is the first in a family of devices to utilise the bus technology. For up to 32 discrete upstream and downstream audio channels, the AD2410 provides 50Mb/s of data bandwidth. The transceiver supports all standard audio sampling rates and the daisy-chaining of multiple AD2410 slave devices to a single master. Suitable for active noise cancellation, in-car communications and microphone beam forming, the device provides system delay which is fully deterministic at all slave nodes. Removing the need for a local power source, the transceiver provides a phantom power capability to all slave nodes, which reduces audio system eBOM costs.

The AD2410, which decreases cabling complexity, meets all relevant automotive ESD, EMI and EMC requirements. Fully AEC-Q100 qualified, the transceiver operates from -40 to +105°C. Enabling the identification of system-related failures, the device features diagnostic capabilities. Using ADI’s SigmaStudio graphical development tool, which minimises development time and ensures fast time to market, the transceiver is fully configurable.

“As an early implementer of ADI’s A²B, Panasonic Automotive found the technology to significantly reduce cabling complexity and associated cost and weight of next-gen infotainment systems, key areas of focus for Panasonic’s OEM customers,” said Jonathan Lane, Group Manager, Audio & Acoustics, part of Panasonic Automotive Systems Company of America (PASA) Advanced Development Engineering. “We believe A²B to be well suited to address applications such as microphone arrays and active noise cancellation, a leading area of expertise for Panasonic that we expect to be an integral component of next-gen infotainment systems.”

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