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A Temperature-Stabilized Single-Channel 1-GS/s 60-dB SNDR SAR-Assisted Pipelined ADC with Dynamic Gm-R-Based Amplifier
Jiang,Wenning; Zhu,Yan; Zhang,Minglei; Chan,Chi Hang; Martins,Rui Paulo
2020-02-01
Source PublicationIEEE Journal of Solid-State Circuits
ISSN0018-9200
Volume55Issue:2Pages:322-332
Abstract

A temperature-stabilized 12-bit single-channel successive approximation register (SAR)-assisted pipelined analog-to-digital converter (ADC) running at 1 GS/s with Nyquist signal to noise and distortion ratio (SNDR) above 60 dB is presented. The ADC uses a three-stage (4 b-4 b-6 b) SAR-assisted pipeline hybrid architecture to achieve an attractive energy efficiency along with an extended sampling rate. A high-linearity open-loop Gm-R-based residue amplifier (RA) with both complete-settled and dynamic features improves the residue amplification efficiency and speed, while reducing the gain variation over a temperature drift. The inter-stage gain variation over the temperature is compensated through complementary temperature coefficients (TCs) from the inner devices of the RA. Furthermore, a cascade amplification topology in the backend RA alleviates the effect of the input parasitic capacitance to its front-end capacitor DAC (CDAC), thus leading to a small CDAC size to accelerate amplification and conversion. The prototype ADC was fabricated in a 28-nm CMOS process and consumes 7.6 mW from a 1-V power supply at 1 GS/s. The measured inter-stage gain variation is less than 2.3% with a temperature range from 0 °C to 80 °C. The SNDR and SFDR are 60 and 74.6 dB with a Nyquist input, respectively, achieving a Walden figure-of-merit (FoM) of 9.3 fJ/conversion-step and a Schreier FoM of 168.2 dB.

KeywordAnalog-to-digital Converter (Adc) Gm-r Amplifier Pipelined-successive Approximation Register (Sar) Adc Residue Amplifier (Ra) Sar Sar-assisted Pipelined Adc Temperature Compensation
DOI10.1109/JSSC.2019.2948170
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000510725300009
Scopus ID2-s2.0-85079658303
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Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorZhang,Minglei
AffiliationDepartment of Electrical and Computer Engineering,State Key Laboratory of Analog and Mixed Signal VLSI,Faculty of Science and Technology,Institute of Microelectronics,University of Macau,Macao
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Jiang,Wenning,Zhu,Yan,Zhang,Minglei,et al. A Temperature-Stabilized Single-Channel 1-GS/s 60-dB SNDR SAR-Assisted Pipelined ADC with Dynamic Gm-R-Based Amplifier[J]. IEEE Journal of Solid-State Circuits,2020,55(2):322-332.
APA Jiang,Wenning,Zhu,Yan,Zhang,Minglei,Chan,Chi Hang,&Martins,Rui Paulo.(2020).A Temperature-Stabilized Single-Channel 1-GS/s 60-dB SNDR SAR-Assisted Pipelined ADC with Dynamic Gm-R-Based Amplifier.IEEE Journal of Solid-State Circuits,55(2),322-332.
MLA Jiang,Wenning,et al."A Temperature-Stabilized Single-Channel 1-GS/s 60-dB SNDR SAR-Assisted Pipelined ADC with Dynamic Gm-R-Based Amplifier".IEEE Journal of Solid-State Circuits 55.2(2020):322-332.
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