LS4k line scan image sensor
Spanish company, AnaFocus, has launched the LS4k, a high-speed, high-performance CMOS system-on-chip (SoC) line scan image sensor optimised for applications requiring short exposure times and high accuracy line rates. It incorporates on-chip two pixel lines consisting of 4,096 7μm-pitch pixels and 2,048 14μm-pitch pixels respectively. The sensor has high-accuracy (12-bit) high-speed (80MHz) analogue-to-digital (A/D) conversion, sophisticated on-chip optical calibration for PRNU and DSNU, and lens shading correction.
The CMOS line sensor array utilises active CMOS pixels with pinned photodiodes to deliver high image quality while maintaining the size, cost, and integration advantages of CMOS. The readout path permits CMOS pixel binning (2 x 2) increasing effective response and line rate. Windowing or sub-sampling allows a maximum line rate of 70,000 lines per second for a 500-pixel window with 65dB of dynamic range.
The LS4k incorporates an SPI port for configuration, is operated by an external host device and has three high-speed LVDS ports for video output. The reference voltages are generated on-chip from an internal band-gap reference. Power consumption at maximum line rate is 500mW. A power-down mode is available for low current consumption when the device is inactive.