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Proceedings Article

CMOS Active Pixel Sensor (APS) Imager for Scientific Applications

[+] Author Affiliations
Suat U. Ay, Eric R. Fossum

Micron Imaging (USA) and Univ. of Southern California (USA)

Michael P. Lesser

Steward Observatory/Univ. of Arizona (USA)

Proc. SPIE 4836, Survey and Other Telescope Technologies and Discoveries, 271 (December 1, 2002); doi:10.1117/12.461429
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From Conference Volume 4836

  • Survey and Other Telescope Technologies and Discoveries
  • J. Anthony Tyson; Sidney Wolff
  • Waikoloa, Hawai'i, United States | August 22, 2002

abstract

A 512×512 CMOS Active Pixel Sensor (APS) imager has been designed, fabricate, and tested for frontside illumination suitable for use in astronomy specifically in telescope guider systems as a replacement of CCD chips. The imager features a high-speed differential analog readout, 15 μm pixel pitch, 75 % fill factor (FF), 62 dB dynamic range, 315Ke- pixel capacity, less than 0.25% fixed pattern noise (FPN), 45 dB signal to noise ratio (SNR) and frame rate of up to 40 FPS. Design was implemented in a standard 0.5 μm CMOS process technology consuming less than 200mWatts on a single 5 Volt power supply. CMOS Active Pixel Sensor (APS) imager was developed with pixel structure suitable for both frontside and backside illumination holding large number of electron in relatively small pixel pitch of 15 μm. High-speed readout and signal processing circuits were designed to achieve low fixed pattern noise (FPN) and non-uniformity to provide CCD-like analog outputs. Target spectrum range of operation for the imager is in near ultraviolet (300-400 nm) with high quantum efficiency. This device is going to be used as a test vehicle to develop backside-thinning process.

© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Suat U. Ay ; Michael P. Lesser and Eric R. Fossum
"CMOS Active Pixel Sensor (APS) Imager for Scientific Applications", Proc. SPIE 4836, Survey and Other Telescope Technologies and Discoveries, 271 (December 1, 2002); doi:10.1117/12.461429; http://dx.doi.org/10.1117/12.461429


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