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• A²B 2.0 (ADAA245x series) is now fully released to production, supporting OEM and Tier 1 program ramps;
• Delivers 4× bandwidth increase, preserving deterministic, low-latency (62 μs) performance and architectural simplicity;
• Designed for the software-defined vehicle, A²B 2.0 supports Ethernet data tunneling via Open Alliance SPI (OASPI) interface with A²B 1.0 cable and connector compatibility, enabling up to 30% system cost reduction.
As the next evolution of ADI's A²B technology, A²B 2.0 is designed to help automotive OEMs (original equipment manufacturers) and Tier 1 suppliers deliver richer in‑cabin audio experiences through greater bandwidth and Ethernet integration, while preserving the low‑latency, simple architecture that has defined A²B for years.
A Proven Foundation: A Decade of A²B Adoption
Over the past decade, A²B has been broadly adopted in the automotive industry, with hundreds of millions of nodes on the road from over 35 automotive manufacturers, establishing a strong foundation for the next evolution of the technology.
Built for applications where low and deterministic latency is a key system requirement, A²B was designed to support demanding use cases such as road-noise cancellation and in‑car communications through a simple, flexible, and cost‑effective approach to audio connectivity. Its single main, multiple sub‑node daisy‑chain architecture reduces wiring complexity and associated costs by up to 75%. The straightforward architecture with zero software overhead also lowers overall development time and investment for OEMs and Tier 1 suppliers.
A²B’s momentum is reinforced by an ecosystem that spans OEMs, silicon partners, and original design manufacturers (ODMs), supported by an expansive set of development and test tools that accelerate time‑to‑market.
The Shift to Modern Vehicle Networks and Software-Defined Vehicle (SDV) Architectures
As vehicles transition to software‑defined architectures, in‑cabin features are increasingly delivered and improved through software, raising the bar for deterministic, high‑bandwidth connectivity that can integrate cleanly with modern in‑vehicle networks. As in‑cabin technology becomes a key differentiator for automakers, expectations for premium audio and infotainment continue to rise, ultimately driving demand for higher bandwidth, advanced connectivity, and seamless integration with today’s vehicle networks.
“Audio is central to how drivers perceive refinement, safety, and responsiveness inside the vehicle, especially as cabins become more software‑defined,” said Yasmine King, Corporate Vice President, Head of Automotive Business Unit, ADI. “In this new era, engineers need audio connectivity that integrates cleanly with the broader vehicle network. A²B 2.0 delivers higher bandwidth, low latency and Ethernet tunneling without adding architectural complexity.”
A²B 2.0: Built for Next‑Generation Cabin and SDV Architectures
A²B 2.0 expands the A²B platform with higher bandwidth and Ethernet compatibility, while maintaining the low‑latency, simple architecture customers rely on. Key capabilities include:
• Performance and scalability
- 4× bandwidth increase (up to 98.3Mbps, full duplex) to support more advanced in-vehicle audio architectures.
- Support for up to 119 upstream and 119 downstream audio channels to enable advanced automotive audio system configurations.
• Ethernet compatibility
- Ethernet data tunneling via the industry-standard Open Alliance SPI (OASPI) interface, for enhanced connectivity and flexibility.
• Efficiency, latency, and upgrade path
- Up to 30% system cost reduction enabled through increased functional integration and reduced external circuitry and components.
- Low and deterministic latency, including a noted 62 μs low latency and an architecture designed for straightforward integration.
- Compatibility with existing A²B 1.0 cabling and connector infrastructure, supporting a simple upgrade path. Additionally, the ADAA245x devices can easily branch to A2B 1.0 networks, maximizing re-use of existing modules.
Availability
A2B 2.0 is now fully released to production. Please visit to learn more.
About Analog Devices, Inc.
Analog Devices, Inc. (analog.com) is a global semiconductor leader that bridges the physical and digital worlds to enable breakthroughs at the Intelligent Edge. ADI combines analog, digital, AI, and software technologies into solutions that combat climate change, reliably connect humans and the world, and help drive advancements in automation and robotics, mobility, healthcare, energy and data centers. With revenue of more than $11 billion in FY25, ADI ensures today's innovators stay Ahead of What's Possible.
Media Contact: Jeff Ambrosi - Senior Director, Investor Relations, Analog Devices, Inc.
P: 781-461-3282
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