AD2428WCCSZ-RL ADI Audio Transmitters, Receivers, Transceivers A2B master/slave 4xPDM XCVR w I2S/TDM

AD2428WCCSZ-RL ADI Audio Transmitters, Receivers, Transceivers A2B master/slave 4xPDM XCVR w I2S/TDM  Automotive Audio Bus A2B Transceiver

1.A2B BUS FEATURES
Line topology
Single master, multiple slave
Up to 15 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
Low latency slave to slave communication
Control and status information I2C to I2C
GPIO over distanceBus power or local power slave nodes
Configurable with SigmaStudio graphical software tool
Qualified for automotive applications

A2B TRANSCEIVER FEATURES
Configurable as A2B bus master or slave (AD2428W)I2C interface
8-bit to 32-bit multichannel I2S/TDM interface
I2S/TDM/PDM programmable data rateUp to 32
upstream and 32 downstream channels
PDM inputs for 4 high dynamic range microphones on mas-ters or slaves
Support for receiving I2S data on nodes with up to 4 PDM microphones
Unique ID register for each transceiver
Support for crossover or straight-through cabling
Programmable settings to optimize EMC performance

2.APPLICATIONS
Automotive audio communication link
Active noise cancellation
Microphone arrays for hands free and in car communication

3.GENERAL DESCRIPTION
The Automotive Audio Bus (A2B®) provides a multichannel, I2S/TDM link over distances of up to 15 m between nodes. It embeds bidirectional synchronous pulse-code modulation (PCM) data (for example, digital audio), clock, and synchroni-zation signals 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 and/or con-sume time division multiplexed channel content.
A2B is a single-master, multiple-slave system where the trans-ceiver chip at the host controller is the master. The master 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 con-trol bus is embedded in the A2B data stream, which grants direct access of registers and status information on slave transceivers as well as I2C to I2C communication over distance.
The transceiver can connect directly to general-purpose digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), microphones, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and codecs through a multichannel I2S/TDM interface. It also provides a PDM interface for direct connection of up to four PDM digital microphones.
Finally, the transceiver also supports an A2B bus powering fea-ture, 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.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