Enhanced Automotive Audio Bus Transceivers - …

1 AD2426W/AD2427W/AD2428 WEnhanced Automotive Audio Bus TransceiversVisit Audio Bus technology provides a multi-channel, I2S/TDM link over distances of up to 15 meters between nodes. It embeds bidirectional synchronous data, clock, control data, and a power supply 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 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 Applications Include XAudio ECU communication links XActive noise cancellation (ANC) XRoad noise cancellation (RNC) XMicrophone arrays for hands-free, in-car communications and eCall systemsSimple and Cost-Effective Architecture for Emerging Applications XDigital Audio ; single, low cost, unshielded twisted pair (UTP) wire transports Audio , control, clock, and powerVREG1I2 CPLLBCLK/PDMCLKDTX0/DTX1 IRQ/IO0 DRX0/DRX1 SYNCSDASCLADR1/IO1/CLKOUT1 IOVDDA2 BTRx A(Toward Master)A2 BTRx B(Toward Last Slave)BCMAPACMBNDVDDATRXVDD/BTRXVDDPLLVD DVSSSWPVINVOUT1 ADR2/IO2/CLKOUT2 VREG2 VOUT2 VSSNANBPSENSED iagnosticsI2S/TDMPDMIO7 Automotive Audio BusACTIVE SUBWOOFERREMOTE TUNERMODULE AUDIOAMPHEADUNITeCALLBOX 2018 analog Devices, Inc.

2 All rights reserved. Trademarks and registered trademarks are the property of their respective of What s Possible is a trademark of analog (C) Devices, Inc. Worldwide HeadquartersAnalog Devices, Inc. One Technology Way Box 9106 Norwood, MA 02062-9106 Tel: ( , only) Fax: Devices, Inc. Europe HeadquartersAnalog Devices GmbH Otl-Aicher-Str. 60-6480807 M nchen Germany Tel: Fax: Devices, Inc. Japan HeadquartersAnalog Devices, KK New Pier Takeshiba South Tower Building 1-16-1 Kaigan, Minato-ku, Tokyo, 105-6891 Japan Tel: Fax: Devices, Inc. Asia Pacific HeadquartersAnalog Devices 5F, Sandhill Plaza 2290 Zuchongzhi Road Zhangjiang Hi-Tech Park Pudong New District Shanghai, China 201203 Tel: Fax: and BenefitsHigh bandwidth (50 Mbps) digital busSupport for up to 32 upstream and downstream Audio channels Data, control, clock, plus power on a single wire pairSystem cost reduction using low cost, UTP cable Single master, multiple slave, line topologyDaisy-chaining supported with zero processor overhead Phantom power capabilityEliminates the need for local power supplies Embedded diagnosticsEasy system-level fault detection and correction Fully configurable via SigmaStudio graphical design environmentFast time to marketSigmaStudio Graphical Design Environment XVisual bus setup and stream-based network design XIntuitive graphical user interface to config ure the bus XExport/import of streams, nodes, and bus configuration XExtensive debug and tracing support XBus bandwidth utilization calculation XBit error rate test (BERT)

3 XLine diagnostics XFirmware driver generationMultifunction Evaluation Systems XProof of concept XTest and verification XDebug, EMC testingProduct Comparison GuideFeatureAD2426 WCCSZ1,2AD2427 WCCSZ1,2AD2428 WCCSZ1,2 Master capableNoNoYe sFunctional TRx blocksA onlyA and BA and BI2S/TDM supportNoNoYe sPDM microphone inputs4 mics4 mics4 micsMaximum node-to-node cable length15 m15 m15 m1 Z = RoHS compliant W = qualified for Automotive applications. To learn more about the breakthrough Automotive Audio Bus technology, watch the video. Evaluation Board Ordering GuideModelDescriptionEVAL-AD2428WB1 BZPhantom power slave evaluation board; stereo in, stereo out, and stereo microphoneEVAL-AD2428WC1 BZPhantom power slave evaluation board with four microphonesEVAL-AD2428WD1 BZMaster evaluation board with SigmaDSP ADAU1452 EVAL-AD2428WG1 BZLocal power slave evaluation board; stereo in, stereo outEVAL-AD2428WD2 DZMaster EMC boardEVAL-AD2428WG1 DZLocal power slave EMC boardEVAL-AD2428WC1 DZPhantom power slave EMC boar