AD2425W

Enhanced Automotive Audio Bus^® (A²B^®) Transceiver supporting both Master and Slave operation

Data Sheet

Rev. SpB

Recommended for New Designs

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Overview

Features and Benefits
Product Details

Features and Benefits

High bandwidth (50Mbps) digital bus support for up to 32 upstream and downstream audio channels
Data, control, plus power on a single wire pair provides system cost reduction using low-cost unshielded, twisted pair cable
Single-master, multiple-slave, line topology supports daisy chaining with zero processor intervention
Phantom power capability eliminates the need for local power supplies
Embedded diagnostics provide easy system level fault detection & correction
Fully configurable via SigmaStudio™ graphical design environment promotes Fast time to market

Product Details

The Automotive Audio Bus^® (A²B^®) is an innovative technology that reduces system cost, weight, and design complexity by distributing audio and control data, together with clock and power over a single, low-cost, unshielded twisted pair cable. The AD2425W is an enhanced A²B transceiver offering an expanded feature set while retaining complete compatibility with existing AD241x devices. The AD2425W is fully configurable supporting both master and slave functionality.

The AD2425W is targeted for use in wiring intensive applications where reducing the weight or complexity of existing cable harnesses is a primary system design objective. These applications include Premium Audio Systems, Active Noise Cancellation, and In-Car Communications.

Applications

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

Product Categories

Audio & Video Products
- Automotive Audio Bus®

Interface & Isolation
- Automotive Audio Bus®

Markets & Technology

Automotive

Please contact your nearest ADI sales office to complete a Non-Disclosure Agreement (NDA) required to receive additional technical product information.

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Product Lifecycle Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

ADZS-AUDIOA2BAMP

A²B^® Class-D Amplifier Module for the SHARC® Audio Module
SHARC Audio Module

An expandable hardware/software platform for audio applications

ADZS-AUDIOA2BAMP

View Detailed Evaluation Kit Information

The A²B Class-D Amplifier Module is an expansion board for the SHARC Audio Module (ADZS-SC589-MINI) that leverages ADI’s low-latency audio A²B bus technology. It features an AD2425W A²B transceiver (serving as an A²B slave) and accepts audio over the A²B bus from the SHARC Audio Module, featuring the same AD2425W A²B transceiver (serving as the A²B master) and the ADSP-SC589 SHARC processor (serving as the A²B host).

The ADZS-AUDIOA2BAMP Module drives the received A²B data to a pair of high-efficiency, digital input, stereo SSM3582 class-D audio amplifiers. Audio is transmitted digitally to the amplifier, minimizing the possibility of signal corruption in digital environments. See the SSM3582 data sheet for more information.

The A²B Class-D Amplifier Module is connected to the SHARC Audio Module using the included A²B twisted-wire-pair cable.

Features & Benefits

Two SSM3582 high-efficiency Class-D amplifiers
- Inputs: 4 mono (or 2 stereo) channels, sourced by
  - the SHARC Audio Module (or another A²B source) connected via A²B
  - a TDM I2S source connected to 12-pin header
- Outputs: 4 amplified speaker channels at 15W each or 2 "bridged" amplified channels at 50W each. Each SSM3582 can provide:
  - 2× 14.67 W output at 12 V supply to 4 Ω loads at <1% THD + N, or
  - 1× 49.69 W output at 16 V supply to 2 Ω loads at <1% THD + N
- Class-D amp bridged mode can be used to support 2.1 audio configurations
AD2425W low-latency audio bus A²B transceiver
- Connects to SHARC Audio Module via A²B twisted-wire-pair cable (included)
- Two pushbuttons routed to I/O pins (can be sensed by any system A²B node)
- Two GPIO pins routed to LEDs (can be driven by any system A²B node)
Can be cascaded via A²B to provide 8 amplified output channels to support 7.1 and other speaker configurations
Further expansion possible using additional modules connected via A²B or fins connected directly to the SHARC Audio Module expansion port
Fully integrated A²B software and drivers in the Bare Metal Audio framework

Resources

A²B Class-D Amplifier Module User Guide

SHARC Audio Module

View Detailed Evaluation Kit Information

The SHARC^® Audio Module is an expandable hardware/software platform that enables project prototyping, development and deployment of audio applications including effects processors, multi-channel audio systems, MIDI synthesizers, and many other DSP-based audio projects.

The centerpiece of the SHARC Audio Module is the Analog Devices ADSP-SC589 SHARC processor, a remarkable engine for audio processing which incorporates dual SHARC+ DSP cores and an ARM core. Accompanying the SHARC is an expert selected group of peripherals ideally suited for audio project development.

While the SHARC Audio Module can be used as a self-contained product, it is designed for custom expansion. Analog Devices is developing expansion boards (called “Fins”). The first in this series is an Audio Project Fin that plugs directly onto the main SHARC Audio Module.

In addition, there are several leading developers and board designers that provide a variety of software and hardware platforms for you to expand the SHARC Audio Module platform. Since all of the major functions and GPIO of the board can be accessed via the two multi-pin connectors, you can easily design and build your own expander. Documentation for these connectors can be found in the SHARC Audio Module Hardware Reference Manual.

This board is designed to be used in conjunction with the CrossCore^® Embedded Studio (CCES) development tools. The development environment aids advanced application code development and debug.

In addition to traditional C and C++ development, the SHARC Audio Module supports Faust (Functional Audio Stream), an open-source, functional programming language, specifically designed for real-time audio signal processing and synthesis. Faust generates C++, as well as other target languages, for signal processing applications. The Faust library provides a rich set of audio DSP objects that can be used in creating DSP algorithms. Using Faust, it is possible to quickly create large algorithms that take advantage of the computing power available on the SHARC Audio Module platform.

Features & Benefits

ADSP-SC589 Floating-Point SHARC^® Processor
- Dual 500 MHz SHARC+^® DSP cores and a 500MHz ARM^® Cortex^®-A5 core
Two 2Gbit DDR3 memories
512Mbit SPI flash memory
24-bit, 96kHz ADAU1761 SigmaDSP^® Audio Codec
AD2425W A²B^® Transceiver
- Multi-channel low-latency audio interface
1/8“ stereo jacks
Two 60-pin connectors, supporting ADI and 3rd Party “Fins” (Expansion Boards)
Includes a free CrossCore^® Embedded Studio license and an ICE-1000 emulator for debugging (ICE-1000 is shipped separately)

Additional Peripherals:

UART (for MIDI & more)
S/PDIF
Gigabit Ethernet
USB OTG & HS

Resources

Documentation

Data Sheets (1)

PDF

247.87 K

AD2421W/AD2422W/AD2425W: Automotive Audio Bus A²B Transceiver Data Sheet (Rev. SpB)

Reference Materials

Videos (1)

3rd-Generation A<sup>2</sup>B® Transceivers Offer Enhanced Configurability

3rd-Generation A²B® Transceivers Offer Enhanced Configurability

Press Releases (2)

Analog Devices’ Expanded Series of A²B Transceivers Significantly Improves...

Ford Motor Company Selects Analog Devices’ Automotive Audio Bus™ for...

Design Resources

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