Automotive Product of the Year
Product Name: AR0820AT
AR0820AT CMOS digital image sensor
onsemi’s AR0820AT is an advanced CMOS digital image sensor that captures high-quality images in a variety of challenging lighting conditions. The sensor is specifically designed to be used in automotive applications – especially Automated Driver Assistance Systems (ADAS) where the image sensor forms a fundamental part of the vision system that will detect objects in the vehicle’s path, including pedestrians and other vehicles. With features like higher dynamic range and higher resolution (8.3 MP), this will assist drivers and ultimately enable a new generation of fully autonomous vehicles with the essential 360-degree vision.
The AR0820AT is a 1/2−inch CMOS digital image sensor with a 3848 H x 2168 V active−pixel array, giving a total of 8.3 million pixels. This advanced automotive sensor captures images in either linear or high dynamic range, with rolling−shutter readout.
The high resolution of this sensor, coupled with the ability to operate effectively in poor lighting conditions enhances the capabilities of ADAS systems. Higher resolution allows smaller objects to be detected and identified by the system. This allows objects and other hazards to be detected at a greater distance, allowing the vehicle to alert the driver or take avoiding action earlier, thereby enhancing road safety.
The sensor includes sophisticated on-board fault monitoring and detection to ensure that the image can be relied upon. By moving the responsibility for fault detection from the main processor to the sensor itself, especially in the case of high-resolution sensors such as the AR0820AT, significant processing power is saved and any faults or issues are able to be detected far more quickly, allowing the vision system to return to a safe state before a potentially hazardous event occurs.
In fact, this sensor is capable of attaining classification to Automotive Safety Integration Level (ASIL) B – an industry-wide recognition of safety that is based upon ISO 26262.
A 2 x 2 in-pixel binning mode allows the sensor to operate at reduced resolution. This is a very useful feature when monitoring a scene and, once a situation of interest is detected, the sensor can be rapidly switched to full resolution. This reduces the number of pixels that need to be processed from each frame while monitoring, allowing faster detection of events of concern.
The inbuilt cybersecurity ensures reliable and secure operation when multiple cameras around the vehicle are connected to a centralized system where data and commands must travel by wires between the sensor and the processor. This is an increasingly important issue as vehicles become ‘connected’ to other vehicles and the environment around them.
Autonomous vehicles are one of the most highly anticipated innovations with a potential impact that will change the lives of millions globally. The AR0820AT image sensors enable AVs to see further and at the same time have the ability to detect objects of all sizes. As this technology becomes accessible to the general public, it will surely change the way we drive and use the transportation. But most significantly, we can keep the drivers, passengers and vehicles safe on the road.
onsemi’s AR0820AT makes a significant contribution to improving road safety by enhancing ADAS that warn drivers of dangerous situations. More advanced systems can automatically brake or steer an autonomous vehicle around a hazard – such as a pedestrian or a moving object that has stepped into the path of the vehicle – without driver intervention.
With a scalable family of image sensors from onsemi (of which the AR0820AT is a key part), automotive OEMs are able to deploy the optimum sensor for each application within each vehicle they produce while leveraging software and algorithm development across all devices. This both reduces development time and diminishes design risk.
And finally, the AR0820AT is at the heart of the vision system on the AutoX RoboTaxi – the first licensed fully autonomous taxi in China with hundreds of vehicles deployed in Shanghai, Shenzhen, Wuhan as well as a pilot roll-out of RoboTaxis and RoboDelivery in California. The RoboTaxis each incorporate a total of 28 AR0820AT sensors, providing a full surround view with zero blind spots ensuring that they can handle the densest and most dynamic traffic conditions.