Features and Benefits

  • AD2428W Automotive Audio Bus A2B® Transceiver
    • Programmable as A2B master or slave
    • Multichannel I2S/TDM interface
    • Three PDM microphone inputs
    • Locally powered
      • LT8609 – 2A/3A Peak Synchronous Step-Down Regulator with 2.5μA Quiescent Current
      • LTC4040 – 2.5A Battery Backup Power Manager
      • LTC3621 – 1A Synchronous Step-Down Regulator
      • LTC3121 – 1.5A Synchronous Step-Up DC/DC Converter
    • Configurable with SigmaStudio graphical software tool
  • ADAU1452 SigmaDSP® Digital Audio Processor
  • ADAU1761 SigmaDSP Stereo, Low Power, 96kHz, 24-Bit Audio Codec with Integrated PLL
  • Reset, Status, and Interrupt LEDs
  • Jumper Controls
    • Power, clock, and synchronization signal source
    • Data routing

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.

Product Details

An Automotive Audio Bus (A2B®) system consists of a single master and at least one slave, where the transceiver at the host controller is the master. The master transceiver generates clock, synchronization, and framing for all slave nodes and is programmable over a control bus (I2C) for configuration and readback. An extension of this control bus is embedded in the A2B data stream, which enables the host to directly access slave transceiver registers and any I2C-connected peripherals on slave nodes. Transceivers can connect directly to PDM microphones and to numerous peripherals via I2C and a multichannel I2S/TDM interface. Finally, the transceiver also supports an A2B bus powering feature, where the master node supplies voltage and current to the slave nodes over the same daisy-chained, twisted pair wire cable as used for the communication link, thus eliminating the need for a power supply on bus-powered slave nodes. Due to the numerous configurations that are possible for a given A2B system, there are several evaluation platforms that can be used in combination to verify system operation, as summarized in the table below.

Product Comparison Guide
A2B Evaluation Board Master/Slave Power
EVAL-AD2428WD1BZ Master/Slave Local Yes 3
EVAL-AD2428WB1BZ Slave Bus Yes 2
EVAL-AD2428WC1BZ Slave Bus No 4
EVAL-AD2428WG1BZ Slave Local Yes 0
 ADZS-AD2428MINI  Master/Slave Local/Bus  Yes   0

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.


Software Development Tools

A2B network design tool and embedded software stack that allows audio network designers to graphically design an A2B network and deploy it into an embedded platform.
Graphical development tool for programming, development, and tuning software for ADI DSP audio processors and A2B® transceivers.


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