AD24xx Product Family Data Sheet

Automotive Audio Bus
A2B Transceiver
AD2401/AD2402/AD2403/AD2410
A2B BUS FEATURES
GENERAL DESCRIPTION
Line topology
Single master, multiple slave
Up to 10 meters between nodes and Up to 40 meters overall cable length
Communication over distance
Synchronous data
Multichannel I2S/TDM to I2S/TDM
Clock synchronous, phase aligned in all nodes
Control and status Information
I2C to I2C
Phantom power or local power slave nodes
Configurable with SigmaStudioTM graphical software tool
Qualified for Automotive Applications
The Automotive Audio Bus (A2BTM) provides a multi-channel,
I2S/TDM link over distances of up to 10 meters between nodes.
It embeds bi-directional synchronous data (for example digital
audio), clock and synchronization 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 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 read back. 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.
ADDITIONAL TRANSCEIVER FEATURES
Configurable as A2B bus master or slave (AD2403/AD2410)
I2C Interface
8-bit to 32-bit multichannel I2S/TDM interface
Up to 32 upstream channels or combination with up to 32
downstream channels
I2S/TDM or PDM Microphone inputs
Automotive audio communication link
Communication network for:
Microphones/speakers
Sensor/actuator
I2C Peripherals
IOVDD DVDD
I2C
BCLK
SYNC
DTX[1:0]
DRX[1:0]
I2S/TDM
PDM
PLLVDD
PLL
VOUT1 VIN
VREG1
VOUT2
VREG2
AD2401
No
A only
No
4 Mics
10 m
A2B
TRX B
™
DIAGNOSTICS
A2B
TRX A
(Towards
Master)
VSS
A2B and the A2B logo are trademarks of Analog Devices, Inc.
AD2402
No
A+B
No
4 Mics
10 m
AD2403
Yes
A+B
Yes
None
1m
AD2410
Yes
A+B
Yes
4 Mics
10 m
A/BTRXVDD
(Towards
Last Slave)
MSTR
Rev. SpB
Table 1. Product Comparison Guide
Feature
Master Capable
Functional TRX Blocks
I2S/TDM Support
PDM Microphone Inputs
Maximum Node-to-Node
Cable Length
APPLICATIONS
SCL
SDA
IRQ/IO0
ADR1/IO1
ADR2/IO2
Complete technical specifications are available for the A2B
transceiver. Contact your nearest Analog Devices sales office to
complete the Non-Disclosure Agreement (NDA) required to
receive additional product information
BP
BCM
BN
SWP
SENSE
AP
ACM
AN
VSSN
Figure 1. Functional Block Diagram
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However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 U.S.A.
Tel: 781.329.4700
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
AD2401/AD2402/AD2403/AD2410
©2015 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D12780F-0-5/15(SpB)
Rev. SpB |
Page 2 of 2
|
May 2015
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