Quantum efficiency of an image sensorThe QE of an image sensor is the fraction of photon flux that contributes to the current in a pixel, and is defined as the number of signal electrons created per incident photon.
Together with so-called Backside Illuminated (BSI) pixels, where pixels are constructed in such a way that the photosensitive layer is not obstructed by interpixel- and other connections as is the case in traditional sensors, the new sensor offers a 21% improvement in responsivity (i.e., electrical output per optical input, usually expressed as amperes or volts per watt of incident radiant power) and a 10% improvement in QE compared to its predecessor.
Housed in an iBGA package the sensor features a variety of sophisticated camera functions such as in-pixel binning and windowing, and it has an on-chip analog-to-digital converter (ADC). When operating in linear mode with a serial interface, the device offers fully HiSPi/MiPi compatible HD support up to 1080p at 90 fps. Two- or three-exposure 1080p HDR output is available at up to 30 fps.