Title :
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
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);
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2014 IEEE Proceedings of the
Conference_Location :
San Jose, CA
DOI :
10.1109/CICC.2014.6946083
