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A Reconfigurable 5-to-14 bit SAR ADC for Battery-Powered Medical Instrumentation.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Nov2015, Vol. 62 Issue 11, p2685-2694. 10p. - Publication Year :
- 2015
-
Abstract
- In battery-powered medical instrumentation, the resolution and signal bandwidth of analog-to-digital converters (ADCs) have to be adapted to the needs of the application to avoid power wastage. This paper presents a reconfigurable successive approximation register (SAR) ADC implemented in 130 nm CMOS that resolves 5–14 bit with a maximum achievable effective number of bits (ENOB) of 13.5 using non-subtractive dither. In the proposed ADC design, the power consumption can be traded for accuracy to improve the energy efficiency and extend its application range, while reducing system integration complexity. A figure-of-merit (FoM) of 59 fJ/conversion is achieved at 1.2 V supply and the converter occupies an area of 0.42 mm^2. Measurement results of the ADC integrated in a multi-channel analog front-end (AFE) circuit show the suitability of the ADC for portable medical monitoring devices. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 62
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 110690273
- Full Text :
- https://doi.org/10.1109/TCSI.2015.2477580