- A²B 2.0 (ADAA245x series) is now fully in mass production, supporting OEMs and Tier 1 suppliers in production ramp-up
- Delivers a 4x bandwidth increase while retaining deterministic low latency (62μs) performance and a simple architecture
- A2B 2.0 is designed for software-defined vehicles, supporting Ethernet data tunneling via the Open Alliance SPI (OASPI) interface, compatible withA²B 1.0 cables and connectors, and can reduce system costs by up to30%
BeijingApril 28, 2026 /PRNewswire/ — Analog Devices, Inc. (NASDAQ: ADI), a global leader in semiconductor technology, today announced that A²B 2.0 (Automotive Audio Bus) is now fully in mass production. As the latest upgrade to ADI’s A²B technology, A²B 2.0 builds on the proven low-latency and simple architecture advantages of A²B over the years, while delivering higher bandwidth and Ethernet integration capabilities, enabling OEMs and Tier 1 suppliers to achieve richer in-cabin audio experiences.
Proven and Mature Technology Foundation: A Decade of A²B Deployment
Over the past decade, A²B has been widely adopted in the automotive industry, with more than 35 automakers deploying hundreds of millions of nodes in vehicles, laying a solid foundation for the next generation of this technology.
A²B is purpose-built for applications requiring deterministic low latency, offering a simple, flexible, and cost-effective audio connectivity solution that easily handles demanding scenarios such as road noise cancellation and in-cabin communication. It employs a daisy-chain architecture with a single master node and multiple slave nodes, reducing wiring complexity and associated costs by up to 75%. Additionally, this simple architecture requires no software overhead, further helping OEMs and Tier 1 suppliers shorten overall development time and reduce development investment.
ADI Launches A²B™ 2.0 to Elevate Next-Generation In-Car Audio Experience
Thanks to an ecosystem encompassing OEMs, chip partners, and original design manufacturers (ODMs), along with a wealth of development and testing tools, A²B’s market momentum continues to grow, significantly accelerating time-to-market.
Transitioning to Modern In-Vehicle Networks and Software-Defined Vehicle (SDV) Architectures
As vehicles evolve toward software-defined architectures, in-cabin functions are increasingly realized and enhanced through software. This trend places higher demands on in-vehicle connectivity technologies, requiring not only determinism and high bandwidth but also seamless integration with modern in-vehicle networks. In-cabin technology is becoming a key differentiator for automakers, with rising consumer expectations for premium audio and infotainment experiences driving demand for higher bandwidth and advanced connectivity that seamlessly integrates with current in-vehicle networks.
Yasmine King, Vice President and General Manager of ADI’s Automotive Business Unit, stated: “As the cabin continues to move toward being software-defined, audio becomes a core element in how drivers perceive exceptional in-vehicle experiences, safety, and agile responsiveness. In this new era, engineers need an audio connectivity solution that seamlessly integrates with the broader vehicle network. A²B 2.0 delivers higher bandwidth, low latency, and Ethernet tunneling capabilities without increasing architectural complexity.”
A²B 2.0: Built for Next-Generation Cabins and SDV Architectures
A²B 2.0 expands the A²B platform’s capabilities by achieving higher bandwidth and Ethernet compatibility while maintaining the low-latency and simple architecture advantages of its predecessor. Key features include:
- Higher Performance and Scalability
- 4x bandwidth increase (up to 98.3 Mbps, full-duplex), supporting more advanced in-vehicle audio architectures.
- Supports up to 119 upstream and 119 downstream audio channels, meeting the configuration needs of advanced automotive audio systems.
- Ethernet Compatibility
- Enables Ethernet data tunneling via the industry-standard Open Alliance SPI (OASPI) interface, enhancing connectivity and flexibility.
- Cost Efficiency, Low Latency, and Easy Upgrades
- Reduces system costs by up to 30% through higher functional integration, simplified external circuitry, and fewer external components.
- Offers low and deterministic latency (notably 62μs low latency) with an architecture designed for straightforward integration.
- Compatible with existing A²B 1.0 cables and connector infrastructure for easy upgrades. Additionally, ADAA245x devices can be easily integrated into A²B 1.0 networks, maximizing reuse of existing modules.
Availability
A2B 2.0 is now fully in mass production. For more information, please visit analog.com.
Additional Resources
ADI Signals+: A2B 2.0: Upgrading Audio Systems, Transforming the Car into a “Third Space”
About ADI
Analog Devices, Inc. (NASDAQ: ADI) is a global leader in semiconductor technology, bridging the physical and digital worlds to enable breakthroughs at the Intelligent Edge. ADI combines analog, digital, AI, and software technologies to address climate change challenges, build reliable connections between people and the world, and drive progress in automation and robotics, automotive, healthcare, energy, and data centers. With fiscal year 2025 revenue exceeding $11 billion, ADI empowers innovators to go beyond what’s possible. For more information, visit https://www.analog.com/en.
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