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A Low-Power CT Incremental 3rd Order Sigma Delta ADC for Biosensor Applications
KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.ORCID iD: 0000-0003-3802-7834
2013 (English)In: IEEE Transactions on Circuits and Systems. Part 1: Regular Papers, ISSN 1549-8328, Vol. 60, no 1, 25-36 p.Article in journal (Refereed) Published
Abstract [en]

This paper proposes a 3rd order single-loop continuous-time incremental sigma-delta analogue-to-digital converter (ADC) for time-multiplexed signals. Incremental sigma-delta modulation is used to address medium to high resolution requirements of multi-channel applications, while a 3rd order continuous-time implementation is investigated as an alternative for low-power solutions. A prototype of the proposed modulator, running at 320 kHz, has been fabricated in a 0.15- mCMOStechnology,while the synchronization circuitry to allow incremental operation was built on-board. Measurement results show that the ADC achieves 65.3 dB peak SNR, 64 dB peak SNDR and 68.2 dB dynamic range over a 2 kHz bandwidth. The modulator’s power dissipation is 96 W from a 1.6 V power supply. This translates into the best figure-ofmerit when compared to recently published continuous-time alternatives, while being competitive with respect to state-of-the-art discrete-time counterparts.

Place, publisher, year, edition, pages
IEEE Press, 2013. Vol. 60, no 1, 25-36 p.
Keyword [en]
analog-to-digital conversion, incremental, sigma-delta, continuous-time
National Category
Natural Sciences
Research subject
URN: urn:nbn:se:kth:diva-109780DOI: 10.1109/TCSI.2012.2215753ISI: 000313430000004ScopusID: 2-s2.0-84872104734OAI: diva2:584207
VR ErBio
Swedish Research Council

QC 20130131

Available from: 2013-01-31 Created: 2013-01-08 Last updated: 2013-02-12Bibliographically approved

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