AD242x A²B® Audio Bus Transceiver

Analog Devices' A²B Automotive Audio Bus® technology provides a multichannel, I²S/TDM link over distances of up to 15 meters between nodes. It embeds bidirectional synchronous data, clock, control data, and 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 at the host controller is the master. It generates clock, synchronization, and framing for all slave nodes, resulting in a fully synchronous distributed audio system with deterministic sub-50µs latency. The master A²B transceiver is programmable over a control bus (I²C) for configuration and readback. 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.