7.9 pJ/Step Energy-Efficient Multi-Slope 13-bit Capacitance-to-Digital Converter

被引：24

作者：

Omran, Hesham ^{[1
]}

Arsalan, Muhammad ^{[1
]}

Salama, Khaled N. ^{[1
]}

机构：

[1] KAUST, Elect Engn Program, Sensors Lab, Thuwal 239556900, Saudi Arabia

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2014年 / 61卷 / 08期

关键词：

Capacitance-to-digital conversion (CDC); capacitive sensor interface circuit; energy efficiency; multi-slope; INTERFACE;

D O I：

10.1109/TCSII.2014.2327312

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this brief, an energy-efficient capacitance-to-digital converter (CDC) is presented. The proposed CDC uses digitally controlled coarse-fine multi-slope integration to digitize a wide range of capacitance in short conversion time. Both integration current and frequency are scaled, which leads to significant improvement in the energy efficiency of both analog and digital circuitry. Mathematical analysis for circuit nonidealities, noise, and improvement in energy efficiency is provided. A prototype fabricated in a 0.35-mu m CMOS process occupies 0.09 mm(2) and consumes a total of 153 mu A from 3.3 V supply while achieving 13-bit resolution. The operation of the prototype is experimentally verified using MEMS capacitive pressure sensor. Compared to recently published work, the prototype achieves an excellent energy efficiency of 7.9 pJ/Step.

引用

页码：589 / 593

页数：5

共 15 条

[1]

Analog Devices, AD7153 DATASHEET

[2]

Baker R.J., 2011, CMOS Circuit Design, Layout, and Simulation

[3]

Baxter L.K., 1997, Capacitive sensors, Design and Applications

[4] A low-power capacitance to pulse width converter for MEMS interfacing [J].

Bruschi, P. ;

Nizza, N. ;

Dei, M. .

ESSCIRC 2008: PROCEEDINGS OF THE 34TH EUROPEAN SOLID-STATE CIRCUITS CONFERENCE, 2008, :446-449

[5] A current-mode, dual slope, integrated capacitance-to-pulse duration converter [J].

Bruschi, Paolo ;

Nizza, Nicolo ;

Piotto, Massimo .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2007, 42 (09) :1884-1891

[6] A 828μW 1.8V 80dB Dynamic-Range Readout Interface for a MEMS Capacitive Microphone [J].

Jawed, S. A. ;

Cattin, D. ;

Gottardi, M. ;

Massari, N. ;

Baschirotto, A. ;

Simoni, A. .

ESSCIRC 2008: PROCEEDINGS OF THE 34TH EUROPEAN SOLID-STATE CIRCUITS CONFERENCE, 2008, :442-+

[7]

Kavusi S., 2007, P IEEE ISSCC FEB, P504

[8]

Lajevardi P., 2012, P IEEE INT SOL STAT, P196

[9] An integrated energy-efficient capacitive sensor digital interface circuit [J].

Omran, Hesham ;

Arsalan, Muhammad ;

Salama, Khaled N. .

SENSORS AND ACTUATORS A-PHYSICAL, 2014, 216 :43-51

[10]

Protron Mikrotechnik GmbH, 2012, MICROMACHINED CAP AB

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