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

2020 September

Authors Chiao Liu1, Lyle Bainbridge1, Andrew Berkovich1 , Song Chen1, Wei Gao1, Tsung-Hsun Tsai1, Kazuya Mori2, Rimon Ikeno2, Masayuki Uno2, Toshiyuki Isozaki2, Yu-Lin Tsai3, Isao Takayanagi2 and Junichi Nakamura2

Techincal Digest of 2020 IEEE Electron Devices Meeting, Session 16.1, pp. 327-330, 2020

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.