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Automotive Audio Bus® (A2B®) digital audio bus technology, delivers high fidelity audio for automobiles while significantly reducing the weight of existing cable harnesses (by upwards of 75% in key applications) €œ resulting in improved vehicle fuel efficiency.

Leading automotive manufacturers approached ADI about developing technology that could support multiple microphone arrays in vehicles to enable different applications such as voice recognition, active noise cancellation, and in-car communications.

Note: A2B and Automotive Audio Bus are registered trademarks of Analog Devices, Inc


A2B Adapter Board

The A2B®Adapter Board provides an independent AD2428-based bus monitor that can be used to monitor A2B®systems.

It is designed for use with the Total Phase PROMIRA™, configured with the A2B®Bus Monitor: Level 1 Application.

Note: A2B®and Automotive Audio Bus' are registered trademarks of Analog Devices, Inc.



A2B Adapter Board Enclosure

A2B®Adapter Board Enclosure.


Note: The A2B®Adapter Board is not included with the enclosure.



A2B Bus Monitor

The Total Phase A2B® Bus Monitor includes everything needed to Monitor and Analyse the Automotive Audio Bus (A2B®). The tool has been developed in collaboration with Analog Devices, Inc, the creators of A2B®

The Monitor includes the Total Phase PROMIRA™, a high-performance tool for stimulating and analysing serial buses, an A2B®Bus Monitor, level 1 application, an A2B®Adapter Board used to interface to the A2B®Bus and the Data Centre Bus Analyser Software.

Note: A2B® and Automotive Audio Bus® are registered trademarks of Analog Devices, Inc.



A2B Bus Monitor - Level 1 Application

The Total Phase A2B®Bus Monitor Application provides unprecedented access to the A2B®system. It non-intrusively sniffs A2B®data on the in-vehicle audio line, giving users a real-time view into A2B®traffic on the bus. Additional features include:.

  • Ability to decode and disassemble A2B®superframes into control data and I2S/TDM audio data for easy debugging.
  • Full reporting on Interrupts and GPIO handshakes are correlated into the data capture.
  • Node Topology view allowing quick visualization of all nodes on the (A2B® bus.
  • Option to display and export all node configuration settings to validate node initialization.
  • Support for 28 simultaneous audio channels, including live audio levels and audio visualization tools



A2B Cable: Mini50 to Duraclick, 1m

The A2B®cable is a 30 cm, unshielded twisted pair cable. One end of the cable terminates in a Mini50 connector to connect to the A2B®Adapter Board. The other end terminates in a DuraClik connector for each connections to the full range of Analog Devices A2B®demo boards. The pins of the connectors are crossed, meaning that pin 1 of the Mini50 connector is connected to pin 2 of the DuraClik connector and vice versa.



A2B Cable:Mini50 to tinned ends, 30cm

This A2B®cable is a 30, centimetre, unshielded twisted pair cable. One end of the cable terminates in a Mini50 connector to connect to the A2B®Adapter Board. The other end provides un-terminated tinned ends.

Since the A2B®specification does not define a standard connector, the un-terminated ends allows users to attach any connector necessary for their application.