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Switching scheme with 98.4% switching energy reduction and high accuracy for SAR ADCs

  • Mixed Signal Letter
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Abstract

An energy-efficient digital-to-analogue converter (DAC) switching scheme with high-accuracy is proposed for successive approximation register (SAR) analogue-to-digital converters (ADCs). By utilizing a complementary switching method, the proposed switching scheme achieves a 98.4% switching energy reduction and a 75% area reduction compared to the conventional SAR ADC. Moreover, the accuracy of the SAR ADC is independent on the accuracy of the third reference voltage (Vcm) except the least significant bit, and the common-mode voltage of the DAC outputs keeps approximately unchanged during a conversion cycle, making the design of the SAR ADC more relaxed.

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Acknowledgements

This work was funded by Science and technology project of Sichuan Province project (Nos. 2016GZ0061 and 2016GZ0116) and Science and technology project of Guangdong Province project (No. 2015B090909004).

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Authors and Affiliations

  1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing, 400065, People’s Republic of China

    Liangbo Xie

  2. Center for RFIC and System Technology, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, Sichuan, People’s Republic of China

    Jian Su, Yao Wang, Jiaxin Liu & Guangjun Wen

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  1. Liangbo Xie
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  2. Jian Su
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  3. Yao Wang
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  4. Jiaxin Liu
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  5. Guangjun Wen
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Correspondence to Liangbo Xie.

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Xie, L., Su, J., Wang, Y. et al. Switching scheme with 98.4% switching energy reduction and high accuracy for SAR ADCs. Analog Integr Circ Sig Process 90, 681–686 (2017). https://doi.org/10.1007/s10470-016-0894-y

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  • DOI: https://doi.org/10.1007/s10470-016-0894-y

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