Audio Bus Transceiver (AB); Serial Audio Interface with Master, Multi-Slave Support

The Automotive Audio Bus (A2B™) provides a multi-channel, I2S/TDM link over distances of up to 10 meters between nodes and up to 40m end-to-end. It embeds bi-directional synchronous data (for example digital audio), I2C control, clock and synchronization signals, and phantom power onto a single differential 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 A2B 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 registers 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.

APPLICATIONS

* Automotive audio communication link

* Communication network for:

Microphones/speakers

Sensor/actuator

I2C peripherals

* Line topology

Single master, multiple slave

Up to 10 m between nodes and up to 40 m overall cable length