Melexis introduces its 3rd generation automotive image sensor, the MLX75421 Blackbird. The new 1.35MP 1/3-inch HDR sensor is aimed to automotive safety applications like automatic emergency braking (AEB), electronic mirrors/camera monitor systems (CMS) and autonomous evasive steering. The device is also highly optimized for next generation viewing applications like surround/rear view systems with object detection functions.
The 1344x1008 pixels MLX75421 features a 4 stabilized kneepoint HDR response curve which provides up to 125dB of HDR inside every frame. The HDR full frame rate is 45fps, while 60fps can be achieved when capturing image data from 800 rows. This makes the image sensor also compatible with 720p applications. The device runs fully automatically in HDR mode without the need for a companion chip.
The MLX75421 Blackbird has a dark leakage of less than 5 electrons/s at 25°C and dark temporal noise of less than 4.4 electrons for a 1/30s exposure time. This results in an SNR1 illuminance value of 0.005 lux for light with a wavelength of 535nm over a 1/30s exposure time. The device has a wide operating temperature range of -40°C to +115°C, which benefits its temperature robustness.
“For almost every automotive camera function, car manufacturers and their technology partners are telling us that they need markedly improved low-light performance on what is currently available from image sensor suppliers. Drivers who have earlier generation camera systems in their cars generally want to see more at night. Also upcoming New Car Assessment Program (NCAP) 5-star car ratings are expected to include night conditions for pedestrian and bicycle detection. That’s why we made camera sensitivity and low noise design paramount when developing the Blackbird series. The result is best in class low-light and HDR behavior,” says Cliff De Locht, Product Marketing Manager at Melexis.
The MLX75421 Blackbird sensor has 4 versions: monochrome, RCCC, color RGBG and color RGBC. Production start is planned for early 2015.