A 0.45mW 12b 12.5MS/s SAR ADC with digital calibration

Author

Wei Li ; Tao Wang ; Grilo, Jorge A. ; Temes, Gabor C.

Author_Institution

Oregon State Univ., Corvallis, OR, USA

fYear

2014

fDate

15-17 Sept. 2014

Firstpage

1

Lastpage

4

Abstract

This paper presents a digitally calibrated 12bit 12.5-MS/s successive-approximation-register (SAR) analog-to-digital converter (ADC) intended for low-power wireless communication and medical instrumentation. The performance of the proposed prototype is enhanced by two techniques. A power saving strategy is proposed. Also, several foreground calibration methods for SAR ADCs are proposed to reduce the power dissipation and enhance the conversion accuracy. The design was fabricated in the GlobalFoundries 40 nm CMOS technology. Measurement results showed that after calibration a SFDR of 87.5 dB and a THD improvement of 24.3 dB were achieved.

Keywords

CMOS integrated circuits; analogue-digital conversion; biomedical communication; biomedical equipment; calibration; harmonic distortion; low-power electronics; wireless channels; CMOS technology; GlobalFoundries; SAR ADC; THD improvement; analog-to-digital converter; digital calibration; low-power wireless communication; medical instrumentation; power 0.45 mW; power dissipation; power saving; size 40 nm; successive approximation register; word length 12 bit; Accuracy; CMOS integrated circuits; Calibration; Capacitors; Noise; Power dissipation; Preamplifiers; Analog-to-digital converter (ADC); calibration; mismatch; successive-approximation-register (SAR);

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference (CICC), 2014 IEEE Proceedings of the

Conference_Location

San Jose, CA

Type

conf

DOI

10.1109/CICC.2014.6946083

Filename

6946083