A 15-bit two-step pixel-level ADC for 17μm-pitch low-power and high-dynamic-range IRFPA

Author

Luya Zhang ; Binbin Lyu ; Wengao Lu ; Dahe Liu ; Meng Zhao ; Yacong Zhang ; Zhongjian Chen

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Micro/Nano Fabrication, Peking Univ., Beijing, China

fYear

2015

fDate

24-27 May 2015

Firstpage

670

Lastpage

671

Abstract

This paper presents a novel two-step pixel-level analog-to-digital converter (ADC) design, which is embedded in a 17μm-pitch pixel for Infrared Focal Plane Array (IRFPA). Digitization includes two successive steps: the first is reciprocal and the second linear. With the reciprocal conversion, a high dynamic range is achieved, and the linear conversion, on the other hand, guarantees a suitable frame rate. For verification, a 15-bit two-step ADC along with the correspondent readout modules has been designed in the 0.18μm CMOS technology. The readout circuit operates at the rate of 100fps with an ultra-low power consumption of 45.77nW per pixel.

Keywords

CMOS integrated circuits; analogue-digital conversion; power consumption; 15-bit two-step pixel-level ADC; CMOS technology; high-dynamic-range IRFPA; infrared focal plane array; linear conversion; low-power IRFPA; pixel-level analog-to-digital converter; ultra-low power consumption; Capacitors; Dynamic range; Lighting; Noise; Random access memory; Reservoirs; Transistors; Infrared Focal Plane Array (IRRPA); analog-to-digital converter (ADC); dynamic range; low power; pixel-level;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2015 IEEE International Symposium on

Conference_Location

Lisbon

Type

conf

DOI

10.1109/ISCAS.2015.7168722

Filename

7168722