A reconfigurable 5-to-14 bit SAR ADC for battery-powered medical instrumentation
| Autor: | Schekeb Fateh, Luca Benini, Luca Bettini, Qiuting Huang, Philipp Schonle, Giovanni Rovere |
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| Přispěvatelé: | Fateh, Schekeb, Schonle, Philipp, Bettini, Luca, Rovere, Giovanni, Benini, Luca, Huang, Qiuting |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Engineering
successive approximation register fully dynamic comparator Analog front-end Noise (electronics) law.invention law Electronic engineering Hardware_INTEGRATEDCIRCUITS Dither Hardware_ARITHMETICANDLOGICSTRUCTURES Electrical and Electronic Engineering majority voting multi-channel biomedical instrumentation business.industry Successive approximation ADC Converters reconfigurable analog-to-digital converter Power (physics) perturbation based digital calibration Capacitor Effective number of bits CMOS biopotential signal non-subtractive dither business |
| Popis: | 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 ${\rm mm}^{2}$ . 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. |
| Databáze: | OpenAIRE |
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