A low-power auto-zeroed comparator for column-paralleled 14b SAR ADCs of 384×288 IRFPA ROIC

Author

Meng Chen ; Wengao Lu ; Tingting Tao ; Yacong Zhang ; Zhongjian Chen

Author_Institution

Dept. of Microelectron., Peking Univ., Beijing, China

fYear

2013

fDate

3-5 June 2013

Firstpage

1

Lastpage

2

Abstract

This paper presents a low power comparator with auto-zeroed technique for the readout chain of a 384×288 infrared focal plane array (IRFPA). To overcome the high power consumption of column-paralleled application, a novel inverter=based pre-amplifier is introduced. The performances of the proposed comparator are verified by a 14-bit column paralleled Successive-Approximation-Register (SAR) A/D converter which is developed in a 0.35um CMOS-based process technology. The SFDR of the A/D converter is up to 93dB at a sampling clock of 31.25 KHz with an input signal of 1.009 KHz. The overall static power of the 384 column-paralleled ADCs is less than 50mW.

Keywords

CMOS integrated circuits; analogue-digital conversion; comparators (circuits); focal planes; infrared detectors; low-power electronics; preamplifiers; CMOS-based process technology; IRFPA ROIC; SFDR; column-paralleled SAR ADC; frequency 31.25 kHz; infrared focal plane array; low-power auto-zeroed comparator; preamplifier; readout chain; size 0.35 mum; successive-approximation-register A/D converter; word length 14 bit; Switches; ADC; IRFPA; auto-zero; comparator; low-power;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices and Solid-State Circuits (EDSSC), 2013 IEEE International Conference of

Conference_Location

Hong Kong

Type

conf

DOI

10.1109/EDSSC.2013.6628037

Filename

6628037