Design and implementation of an untrimmed MOSFET-only 10-bit A/D converter with -79-dB THD

Author

Hammerschmied, Clemens M. ; Huang, Qiuting

Author_Institution

Integrated Syst. Lab., Eidgenossische Tech. Hochschule, Zurich, Switzerland

Volume

33

Issue

8

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

1148

Lastpage

1157

Abstract

A MOSFET-only 10-bit A/D converter is described which achieves a total harmonic distortion of up to -79 dB without trimming or calibration. The maximum conversion rate is 200 ksample/s. Implemented in a 1-μm single-poly technology, it occupies 5.12 mm² and consumes 12 mW from a single 5 V supply. The MOSFET-only R-2R ladder, which is the center of the successive approximation architecture, is analyzed, and design considerations, especially the device dimensions, are given. Measurements of the linear behavior of pure MOSFET ladders are presented. The offset sensitivity of the ladder is examined, and an alternative way of summing the ladder current is suggested. A fast and effective differential current comparator is described

Keywords

MOSFET circuits; analogue-digital conversion; comparators (circuits); harmonic distortion; ladder networks; 1 micron; 10 bit; 12 mW; 5 V; R-2R ladder; current summing circuit; design; differential current comparator; offset sensitivity; single-poly technology; successive approximation architecture; total harmonic distortion; untrimmed MOSFET-only A/D converter; Calibration; Fuses; Helium; Linearity; MOSFET circuits; Manufacturing; Production; Resistors; Total harmonic distortion; Wireless communication;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.705353

Filename

705353