Ultra low-power 12-bit SAR ADC for RFID applications

Author

De Venuto, Daniela ; Stikvoort, Eduard ; Castro, David Tio ; Ponomarev, Youri

Author_Institution

DEE, Politec. di Bari, Bari, Italy

fYear

2010

fDate

8-12 March 2010

Firstpage

1071

Lastpage

1075

Abstract

The design and first measuring results of an ultra-low power 12 bit Successive-Approximation ADC for autonomous multi-sensor systems are presented. The comparator and the DAC are optimised for the lowest power consumption. The proposed design has a power consumption of 0.52 ??W at a bitclock of 50-kHz and of 0.85 ??W at 100-kHz with a 1.2-V supply. As far as we know, the Figure-of-Merit of 66 fJ/convertion-step is the best reported so far. The ADC was realised in the NXP CMOS 0.14 ??m technology with an area of 0.35 mm². Only four metal layers were used in order to allow 3D integration of the sensors.

Keywords

CMOS integrated circuits; analogue-digital conversion; comparators (circuits); low-power electronics; radiofrequency identification; RFID applications; autonomous multi-sensor systems; frequency 100 kHz; frequency 50 kHz; power 0.52 muW; power 0.85 muW; ultra low-power 12-bit SAR ADC; voltage 1.2 V; Batteries; Biomedical monitoring; Biosensors; CMOS technology; Computerized monitoring; Energy consumption; RFID tags; Radiofrequency identification; Signal resolution; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Design, Automation & Test in Europe Conference & Exhibition (DATE), 2010

Conference_Location

Dresden

ISSN

1530-1591

Print_ISBN

978-1-4244-7054-9

Type

conf

DOI

10.1109/DATE.2010.5456968

Filename

5456968