ADAA2455

Key Product Features

• Swappable Transceiver Modules (Personality Modules) - scalable architecture designed for all A²B transceiver versions (initial release supports A²B2.0 transceivers)
• Node Emulator A²B 2.0
• ADAA245x — Main/Sub node
• A²B 2.0 Bus Traffic Monitor
• Simultaneous Monitor and Emulator operation
• Selectable audio interface
• Analog I/O
• Digital SPDIF I/O
• USB2.0 Audio Class
• Streaming from/to PC
• Intuitive Graphical User Interface
• Supported on Windows, Linux, MacOS
• Software Development Kit (SDK)

Key Benefits

• Powerful, multi-function HW
• Supports Rapid development
• Software push notifications
• Fully compatible with SigmaStudio+
• Software in Loop (SIL) tests with SDK
• Usage in conjunction with Audio Precision Analyzer

ADI A²B Analyzer HP is a next-generation hardware platform designed to accelerate the design, debug, and validation of A²B networks. Featuring a hot-swappable Personality Module architecture, it is built to support all A²B transceiver families, including A²B 1.0 (AD242x/AD243x) and A²B 2.0 (ADAA245x).

Currently, the Analyzer HP supports A²B 2.0 (ADAA245x) transceivers, with future updates planned to extend compatibility.

Using the A²B Analyzer Studio software, the Analyzer HP can be configured as an active bus emulator, a bus traffic monitor, or both.

1. A²B Analyzer HP - Hardware Highlights

• Swappable Personality Modules for true node emulation
• USB-C Powering
• Variety of audio input/output interfaces
• High Speed USB Interface for audio/control communication
• High Speed Ethernet Interface for audio/control communication (Support Planned in future release)
• Wifi/Bluetooth Support for Remote Control/triggering options (Support Planned in future release)

2. A²B Analyzer Studio - Software Highlights

• GUI
• Intuitive GUI for device configuration and control
• No licensing requirements
• Capture/playback of Real-time audio streams and bus traffic on PC
• Inject test tones/streams from PC on to the bus for debug
• A²B Network/node management and diagnostics
• Audio streaming over USB using ASIO/ALSA/CoreAudio
• Support for Windows, Linux, MacOS
• SDK
  • Software Development Kit (SDK) to create custom applications using C/C++ and Python

The tool can be used in the following scenarios:

• Engineering – Design & Development
• Test & Validation
• Pre-production Testing
• CE/FCC certification process is underway

• ADAA2457 A²B 2.0 Transceiver
• Flexible Audio Interfaces – Multichannel I²S/TDM/PDM support with two independent clock domains and 4-channel ASRC input/output.
• Versatile Connectivity – Ethernet via OA SPI with 10 Mbps Layer-2 A2B MAC-PHY supporting unicast, multicast, and broadcast.
• Configurable I/O – Up to 16 multiplexed GPIOs, 8 serial data pins, 4 PWM outputs, 2 ADC inputs, plus I²C and SPI interfaces.
• Main/Subordinate Node Operation – Supports local power configuration for both node types.
• Breakout Board Design – Includes dual 24-pin headers for custom hardware interfacing and rapid prototyping.
• High-Speed SPI-to-SPI Communication – Enables seamless integration with external SPI-based devices.
• Integrated Power Management – Two MAX20075D 600mA step-down switching regulators for stable operation.
• Diagnostic & Status LEDs – Visual indicators for power, GPIO/PWM activity, interrupts, and system status.
• 100-Pin Connector – Designed for easy interfacing with SOM carrier boards and A²B base boards.
• Onboard EEPROM – Stores configuration data and device identification.

The ADAA245X-EV-A1CA Mini Module is a compact, cost-effective breakout board designed to accelerate development and evaluation of Automotive Audio Bus (A²B^®) systems. It interfaces seamlessly with DSP carrier boards and audio base boards via a 100-pin connector and supports custom hardware integration through a 32-pin (0.1") header. The board functions as either a main or subordinate node, with flexible local power configurations to suit diverse system topologies.

In an A²B network, the main transceiver located at the host controller generates clock, synchronization, and framing signals for all subordinate nodes. It is programmable over I²C or SPI, and the control bus is embedded within the A2B data stream, allowing direct access to subordinate transceiver registers and any connected peripherals.

The ADAA245X-EV-A1CA supports direct connections to PDM microphones and a wide range of peripherals via I²C, SPI, OA-SPI, and a multichannel I²S/TDM interface with two independent clock domains. Additional features include up to 16 multiplexed GPIOs, 4 PWM outputs, 2 ADC inputs, and a 4-channel ASRC input/output for asynchronous sample rate conversion. Integrated MAX20075D step-down regulators provide stable power, while onboard diagnostic LEDs offer visual feedback for power, status, GPIO/PWM activity, and interrupts.

This board is part of a modular evaluation platform that supports various A²B configurations, enabling developers to validate system performance across multiple use cases.

Note: The ADAA245x-EV-A1CA evaluation board can be used either stand-alone OR when combined with the ADAA24xx-EV-B2BX board to emulate an intelligent A²B-connected node.

• A²B MINI Connector Interface – Connects directly to ADAA245X-EV-A1CA (and other MINI boards) via 100-pin A²B MINI connector.
• Boot-Ready EEPROM – Supports initialization and configuration storage.
• USBi Interface – Enables peripheral configuration over I²C, SPI, or OA-SPI via USB.
• ADAU1452 SigmaDSP Processor – Includes auxiliary ADC breakout, optical SPDIF input/output (standard connectors), status LED, and I²S/TDM breakout header with two multipurpose pins.
• ADAU1761 Audio CODEC – Provides DAC output and ADC input via 3.5mm stereo jacks.
• Dynamic CODEC Control – MAX4948 6-channel SPDT switch selects control source: ADAU1452 or A²B MINI-connected board.
• Robust Power Architecture – Accepts 12V barrel-jack input; includes two MAX77504 regulators for 1.8V and 3.3V IO rails.
• Wakeup-Enabled Power Supplies – Onboard regulators can be activated via external WAKEUP signal from the A²B MINI-connected board.

The ADAA24XX-EV-B2BX Sigma-DSP Audio Base Board is a feature-rich platform designed to interface with the ADAA245X-EV-A1CA (and other A2B MINI Boards) via a dedicated high-speed 100-pin A2B MINI connector. It serves as a central hub for audio processing, peripheral configuration, and power management in Automotive Audio Bus (A²B^®) systems.

At its core is the ADAU1452 SigmaDSP processor, offering advanced audio processing capabilities with breakouts for auxiliary ADCs, optical SPDIF input/output, a status LED, and a 0.1" header for interfacing I²S/TDM signals and multipurpose control pins. The board also includes the ADAU1761 CODEC, which delivers high-quality DAC output and ADC input via standard 3.5mm audio jacks.

A MAX4948 6-channel SPDT switch enables dynamic selection of the CODEC controller—either the onboard DSP or an external board connected through the A²B MINI interface. An additional LED is controllable by the interfaced board for status indication or signaling.

Peripheral configuration is streamlined through a USBi interface, allowing access to I²C, SPI, and OA-SPI devices. The board also features a boot-capable EEPROM for initialization and configuration storage.

Power is supplied via a 12V barrel-jack, with onboard regulation provided by dual MAX77504 supplies for selectable 1.8V and 3.3V IO voltages. These regulators can be externally enabled using a WAKEUP signal, allowing synchronized power control from the

Note: The ADAA24XX-EV-B2BX evaluation board must be combined with the ADAA245x-EV-A1CA eval board to emulate an intelligent A2B-connected node.