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Image sensor for ADAS features LED Flicker Mitigation tech

Posted: 22 Oct 2015     Print Version  Bookmark and Share

Keywords:ON Semiconductor  CMOS  image sensor  ADAS 

ON Semiconductor has begun sampling its LED Flicker Mitigation (LFM) technology in a 2.3MP CMOS image sensor aimed at automotive advanced driver assistance systems (ADAS) applications. The AR0231AT is capable of capturing 1080p high dynamic range (HDR) video and includes features that support Automotive Safety Integrity Level B (ASIL B), stated the company.

The LFM technology (patent pending) eliminates high frequency LED flicker from traffic signs and vehicle LED lighting and allows traffic sign reading algorithms to operate in all light conditions. The AR0231AT has a 1/6.82mm optical format and a 1928 (horizontal) x 1208 (vertical) active pixel array. It uses the latest 3µm back side illuminated (BSI) pixel with ON Semi's DR-Pix technology, which offers dual conversion gain for improved performance under all lighting conditions. It captures images in linear, HDR or LFM modes, and offers frame-to-frame context switching between modes.


The device offers up to 4-exposure HDR, capturing more than 120dB dynamic range. The AR0231AT is capable of multi-camera synchronisation support to ease implementation in vehicle applications with multiple sensor nodes, and user programmability is achieved via a simple two-wire serial interface. It also has multiple data interfaces including MIPI, parallel and HiSPi. Other key features include selectable automatic or user controlled black level control, spread-spectrum input clock support and multiple colour filter array options.

The AR0231AT is offered in an 11mm x 10mm iBGA-121 package and engineering samples are available now. It has an operating temperature range of -40°C to 105°C (ambient) and will be fully AEC-Q100 qualified. It will be available in mass production in 2016.

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