A 33-Megapixel 120-Frames-Per-Second 2.5-Watt CMOS Image Sensor With Column-Parallel Two-Stage Cyclic Analog-to-Digital Converters

Kazuya Kitamura, Toshihisa Watabe, Takehide Sawamoto, Tomohiko Kosugi, Tomoyuki Akahori, Tetsuya Iida, Keigo Isobe, Takashi Watanabe, Hiroshi Shimamoto, Hiroshi Ohtake, Satoshi Aoyama, Shoji Kawahito (+1 others)
2012 IEEE Transactions on Electron Devices  
A 33-megapixel 120-frames/s (fps) CMOS image sensor has been developed. The 7808 × 4336 pixel 2.8-μm pixel pitch CMOS image sensor with 12-bit, column-parallel, two-stage, cyclic analog-to-digital converters (ADCs) and 96 parallel low-voltage differential signaling output ports operates at a data rate of 51.2 Gb/s. The pipelined operation of the two cyclic ADCs reduces the conversion time. This ADC architecture also effectively lowers the power consumption by exploiting the amplifier function
more » ... mplifier function of the cyclic ADC. The CMOS image sensor implemented with 0.18-μm technology exhibits a sensitivity of 0.76 V/lx · s without a microlens and a random noise of 5.1 e − rms with no column amplifier gain and 3.0 e − rms with a gain of 7.5 at 120 fps while dissipating only 2.45 and 2.67 W, respectively. Index Terms-Analog-digital conversion, CMOS image sensors, high-definition video, high-resolution imaging.
doi:10.1109/ted.2012.2220364 fatcat:duispiyfnfbc5pm5jbqlnnlrhm