A 4.6μm, 512×512, Ultra-Low Power Stacked Digital Pixel Sensor with Triple Quantization and 127dB Dynamic Range

2020 Dec-15

Authors Chiao Liu*, Lyle Bainbridge*, Andrew Berkovich* , Song Chen*, Wei Gao*, Tsung-Hsun Tsai*, Kazuya Mori, Rimon Ikeno, Masayuki Uno, Toshiyuki Isozaki, Yu-Lin Tsai, Isao Takayanagi and Junichi Nakamura
*Facebook Inc.

2020 IEEE International Electron Devices Meeting (IEDM)

A 512×512 digital pixel sensor (DPS) in stacked CIS process for ultra-low power, ultra-wide dynamic range mobile computer vision applications is presented. Each 4.6µm DPS pixel has an ADC and 10-bit SRAM. We introduce a single exposure triple quantization (3Q) scheme to achieve 127dB DR while consuming 5.3mW at 30fps.