A 12-bit 7 µW/channel 1 kHz/channel incremental ADC for biosensor interface circuits

Author

Chen, Chia-Hung ; Crop, Joseph ; Chae, Jeongseok ; Chiang, Patrick ; Temes, Gabor C.

Author_Institution

Sch. of EECS, Oregon State Univ., Corvallis, OR, USA

fYear

2012

fDate

20-23 May 2012

Firstpage

2969

Lastpage

2972

Abstract

A two-channel micro-power incremental ADC, designed for biosensor interface circuits, is reported. It uses a noise-coupled multi-bit delta-sigma loop, integrated with a novel digital decimation filter operating in near-threshold. It was realized in the IBM 90 nm CMOS technology. The fabricated 90nm CMOS prototype device, for a 1 V_pp differential input range, experimentally shows a 74dB SNDR up to 2 kHz (1 kHz/channel) signal bandwidth. The total measured power consumption of the modulator is 13.5 μW.

Keywords

CMOS integrated circuits; analogue-digital conversion; biomolecular electronics; biosensors; delta-sigma modulation; digital filters; modulators; IBM CMOS technology; biosensor interface circuit; digital decimation filter; frequency 1 kHz; modulator; noise-coupled multibit delta-sigma loop; power 13.5 muW; power 7 muW; power consumption; signal bandwidth; size 90 nm; two-channel micropower incremental ADC; word length 12 bit; Bandwidth; Biosensors; Clocks; Digital filters; Modulation; Multiplexing; Power demand;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Conference_Location

Seoul

ISSN

0271-4302

Print_ISBN

978-1-4673-0218-0

Type

conf

DOI

10.1109/ISCAS.2012.6271940

Filename

6271940