Industry White Paper

A²B® and Ethernet in Automotive Applications: What, When, and How

July 12, 2021 by Analog Devices Download PDF

White Paper Overview

The number of electronic systems in cars has increased in recent years, reaching higher levels of complexity with the adoption of new technologies for infotainment and advanced driver assistance systems (cameras, radar, lidar, etc.), along with multiple sensors for many different purposes (stability, speed, acceleration, etc.).

Typically, sensors require a low bandwidth. The most common accelerometers used in cars have an output data rate (ODR) of a few kHz. When it comes to infotainment, audio and video data require a data rate in the range of several Mbps. However, what is really raising the bar is the adoption of HD multicamera systems for parking assistance, 360° vision systems (also known as bird’s-eye view or surround view monitor systems), radar (RF microwave), and lidar (optical) to enhance advanced driver-assistance systems (ADASs). The coexistence of all these systems is a key factor in the development of autonomous vehicles, but it represents a big challenge for any communication bus.

This white paper provides a detailed description of Automotive Audio Bus (A²B) and compares A²B to the use of ethernet in automotive applications.

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