Incremental delta-sigma A/D converter for ion-sensitive system application

Author

Lee, Po-Chiao ; Chung, Wen-Yaw ; Te, Mark Anthony

Author_Institution

Dept. of Electron. Eng., Chung Yuan Christian Univ., Chungli, Taiwan

fYear

2010

fDate

6-9 Dec. 2010

Firstpage

1035

Lastpage

1038

Abstract

This paper describes a 13-bit high-resolution incremental delta-sigma A/D converter suitable for multi ion-selective sensor array system, also known as electronic tongue system. The incremental delta sigma structure is very suitable for sensor measurement application, since it achieves high accuracy using only simple circuitry. The chip is designed using TSMC 0.35um 3.3V technology having an input range of 1.15V to 2.15V. The chip achieved an excellent linearity performance of -0.17mLSB DNL and range of -0.37LSB to 0.15 LSB INL. The total chip area occupies only 0.09mm² and a power dissipation of 791uW for the analog front-end.

Keywords

analogue-digital conversion; delta-sigma modulation; electronic tongues; ion sensitive field effect transistors; sensor arrays; ISFET; TSMC technology; delta-sigma modulator; electronic tongue system; incremental delta-sigma A/D converter; ion sensitive field effect transistor; multiion-selective sensor array system; power 791 muW; sensor measurement application; size 0.35 mum; voltage 1.15 V to 2.15 V; voltage 3.3 V; word length 13 bit; Bandwidth; CMOS integrated circuits; CMOS technology; Linearity; Monitoring; Switches; Delta-sigma (ΔΣ) modulator; electronic tongue; incremental analog-to-digital (A/D) converter; ion-sensitive sensor;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (APCCAS), 2010 IEEE Asia Pacific Conference on

Conference_Location

Kuala Lumpur

Print_ISBN

978-1-4244-7454-7

Type

conf

DOI

10.1109/APCCAS.2010.5774833

Filename

5774833