A 440-μW, 109.8-dB DR, 106.5-dB SNDR Discrete-Time Zoom ADC With a 20-kHz BW

Efra?m Eland; Shoubhik Karmakar; Burak G?nenRobert van VeldhovenKofi A. A. Makinwa

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A 440-μW, 109.8-dB DR, 106.5-dB SNDR Discrete-Time Zoom ADC With a 20-kHz BW

机译：A 440-μW, 109.8-dB DR, 106.5-dB SNDR Discrete-Time Zoom ADC With a 20-kHz BW

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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 (&inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"& &tex-math notation="LaTeX"&$Delta Sigma text{M}$ &/tex-math&&/inline-formula&) 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 mm&sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"&2&/sup& in a 0.16-&inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"& &tex-math notation="LaTeX"&$mu text{m}$ &/tex-math&&/inline-formula& technology. It achieves 109.8-dB DR, 106.5-dB SNDR, and 107.5-dB SNR in a 20-kHz bandwidth while dissipating 440 &inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"& &tex-math notation="LaTeX"&$mu text{W}$ &/tex-math&&/inline-formula&. 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.

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来源
《IEEE Journal of Solid-State Circuits》 |2021年第4期|1207-1215|共9页
作者
Efra?m Eland; Shoubhik Karmakar; Burak G?nenRobert van VeldhovenKofi A. A. Makinwa;
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作者单位

Faculty of Electrical Engineering, Mathematics, and Computer Science, Delft University of Technology, CD Delft, The Netherlands;

Ethernovia, AA Zeist, The Netherlands;

AMS IP, NXP Semiconductors, AE Eindhoven, The Netherlands;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类基本电子电路;
关键词
Quantization (signal); Modulation; Resistance; Power demand; Signal to noise ratio; Complexity theory; Linearity;

A 440-μW, 109.8-dB DR, 106.5-dB SNDR Discrete-Time Zoom ADC With a 20-kHz BW

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