Print Email Facebook Twitter A 440-μW, 109.8-dB DR, 106.5-dB SNDR Discrete-Time Zoom ADC With a 20-kHz BW Title A 440-μW, 109.8-dB DR, 106.5-dB SNDR Discrete-Time Zoom ADC With a 20-kHz BW Author Eland, E.N. (TU Delft Electronic Instrumentation) Karmakar, S. (TU Delft Electronic Instrumentation) Gonen, B. (Ethernovia) van Veldhoven, Robert (NXP Semiconductors) Makinwa, K.A.A. (TU Delft Microelectronics) Department Microelectronics Date 2021 Abstract This article describes a discrete-time zoom analog-to-digital converter (ADC) intended for audio applications. It uses a coarse 5-bit SAR ADC in tandem with a fine third-order delta-sigma modulator (ΔΣM) to efficiently obtain a high dynamic range. To minimize its over-sampling ratio (OSR) and, thus, its digital power consumption, the modulator employs a 2-bit quantizer and a loop filter notch. In addition, an extra feed-forward path minimizes the leakage of the SAR ADC's quantization noise into the audio band. The prototype ADC occupies 0.27 mm2 in a 0.16-μm technology. It achieves 109.8-dB DR, 106.5-dB SNDR, and 107.5-dB SNR in a 20-kHz bandwidth while dissipating 440 μW. It also achieves state-of-the-art energy efficiency, as demonstrated by a Schreier FoM of 186.4 dB and an SNDR FoM of 183.6 dB. Subject A/D conversionasynchronous SAR analog-to-digital converter (ADC)audio ADCdelta-sigma ADCdiscrete-time (DT) delta-sigmadynamic zoom ADCinverter-based operational transconductance amplifier (OTA)low-power circuitsmulti-bit quantizer To reference this document use: http://resolver.tudelft.nl/uuid:8675122f-6062-419e-9c87-dbfec079ef32 DOI https://doi.org/10.1109/JSSC.2020.3044896 Embargo date 2021-10-31 ISSN 0018-9200 Source IEEE Journal of Solid State Circuits, 56 (4), 1207-1215 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 E.N. Eland, S. Karmakar, B. Gonen, Robert van Veldhoven, K.A.A. Makinwa Files PDF A_440_W_109.8_dB_DR_106.5 ... kHz_BW.pdf 2.69 MB Close viewer /islandora/object/uuid:8675122f-6062-419e-9c87-dbfec079ef32/datastream/OBJ/view