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A2B and the A2B logo are registered trademarks of Analog Devices, Inc. Automotive Audio Bus A2B Transceiver AD2401/AD2402/AD2403/AD2410 Rev. SpE Document Feedback Info rmation furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specif ications subject to change without no ti ce. No license is granted by implication or otherwise un der any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Tel: 781.329.4700 ©2017 Analog Devices, Inc. All rights reserved. T echnical Su p port www.analog.com A2B BUS FEATURES Line topology Single master, multiple slave Up to 10 m between nodes and up to 40 m overall cable length Communication over distance Synchronous data Multichannel I2S/TDM to I2S/TDM Clock synchronous, phase aligned in all nodes Control and status Information I2C to I2C Phantom power or local power slave nodes Configurable with SigmaStudio TM graphical software tool Qualified for automotive applications ADDITIONAL TRANSCEIVER FEATURES Configurable as A2B bus master or slave (AD2403/AD2410) I2C interface 8-bit to 32-bit multichannel I2S/TDM interface Up to 32 upstream channels or combination with up to 32 downstream channels I2S/TDM or PDM microphone inputs
APPLICATIONS
Automotive audio communication link Communication network for: Microphones/speakers Sensor/actuator I 2C peripherals GENERAL DESCRIPTION The Automotive Audio Bus (A2B®) provides a multichannel, I2S/TDM link over distances of up to 10 m between nodes. It embeds bidirectional synchronous data (for example digital audio), clock, and synchronization signals onto a single differ- ential wire pair. A2B supports a direct point to point connection and allows multiple, daisy-chained nodes at different locations to contribute or consume time division multiplexed channel content. A2B is a single-master, multiple-slave system where the transceiver chip at the host controller is the master. It generates clock, synchronization, and framing for all slave nodes. The master A 2B chip is programmable over a control bus (I2C) for configuration and read back. An extension of this control bus is embedded in the A2B data stream allowing direct access of regis- ters and status information on slave transceivers as well as I2C to I2C communication over distance. Complete technical specifications are available for the A2B transceiver. Contact your nearest Analog Devices sales office to complete the nondisclosure agreement (NDA) required to receive additional product information. Table 1. Product Comparison Guide Figure 1. Functional Block Diagram
Rev. SpE | Page 2 of 2 | June 2017 AD2401/AD2402/AD2403/AD2410 I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors). ©2017 Analog Devic es, Inc. All rights reserv ed. Trademarks and registered trademarks are the property of their respective owners. D12780 F-0-6/17(SpE)