A 280 $mu$ W Dynamic Zoom ADC With 120 dB DR and 118 dB SNDR in 1 kHz BW

A 280 $mu$ W Dynamic Zoom ADC With 120 dB DR and 118 dB SNDR in 1 kHz BW
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280 $mu$ W 动态变焦 ADC,在 1 kHz 带宽下具有 120 dB DR 和 118 dB SNDR

DOI:
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发表时间:
2018
影响因子:
5.4
通讯作者:
K. Makinwa
K. Makinwa
中科院分区:
工程技术1区
文献类型:
--
作者:
Shoubhik Karmakar;Burak Gönen;F. Sebastiano;R. van Veldhoven;K. Makinwa

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本文介绍了一种用于低带宽(<1 kHz)仪表应用的动态变焦模数转换器。它采用高速异步逐次逼近寄存器(SAR)ADC,可动态更新全差分内嵌公式ADC的引用。与以前的变焦ADC相比,更快的基准电压源更新放宽了对环路滤波器的要求,从而允许采用高能效放大器。该样机采用直插式工艺制作,在1-kHz带宽内实现了119.1分贝的峰值信噪比、118.1分贝的峰值信噪比和120.3分贝的动态范围。INLINE-FORMANCE><Tex-MATH NOTATION=“LaTeX”>$MU EXT{W}$</TEX-MASHORM&></INLINE-FORMULE>。这导致施赖尔品质因数(FOM)为185.8分贝。
This paper presents a dynamic zoom analog-to-digital converter for use in low-bandwidth (<1 kHz) instrumentation applications. It employs a high-speed asynchronous successive approximation register (SAR) ADC that dynamically updates the references of a fully differential <inline-formula> <tex-math notation="LaTeX">$Delta Sigma$ </tex-math></inline-formula> ADC. Compared to previous zoom ADCs, faster reference updates relax the loop filter requirements, thus allowing the adoption of energy-efficient amplifiers. Fabricated in a 0.16-<inline-formula> <tex-math notation="LaTeX">$mu ext{m}$ </tex-math></inline-formula> CMOS process, the prototype occupies 0.26 mm<sup>2</sup> and achieves 119.1-dB peak signal-to-noise ratio (SNR), 118.1-dB peak signal-to-noise-and-distortion-ratio (SNDR), and 120.3-dB dynamic range (DR) in a 1-kHz bandwidth while consuming 280 <inline-formula> <tex-math notation="LaTeX">$mu ext{W}$ </tex-math></inline-formula>. This results in a Schreier figure of merit (FoM) of 185.8 dB.