An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance

Donghyun Youn; Kyeongwon Jeong; Woongro Youn; Hoyong Seong; Yechan Park; Sohmyung Ha; Minkyu Je

doi:10.1109/ISSCC49661.2025.10904626

An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance

Donghyun Youn, Kyeongwon Jeong, Woongro Youn, Hoyong Seong, Yechan Park, Sohmyung Ha, Minkyu Je

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Capacitive sensors are widely used to acquire various types of physical information. A wideinput-range fast-conversion capacitance-to-digital converter (CDC) with high resolution and energy efficiency can accommodate such diverse applications. Among prior CDC topologies, SAR [1-4] and ΔΣM CDCs [5-10] show high energy efficiency, but their input range is limited by the voltage saturation in analog blocks. Although period-modulation (PM) CDCs [11-13] can achieve a wide input range thanks to their time-domain operation without saturation, they consume a long conversion time to count many oscillation periods, resulting in poor energy efficiency. Moreover, all these topologies inevitably suffer from a trade-off between resolution and conversion time (Fig. 28.1.1(top)).

Original language	English (US)
Title of host publication	2025 IEEE International Solid-State Circuits Conference, ISSCC 2025
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	482-484
Number of pages	3
ISBN (Electronic)	9798331541019
DOIs	https://doi.org/10.1109/ISSCC49661.2025.10904626
State	Published - 2025
Event	72nd IEEE International Solid-State Circuits Conference, ISSCC 2025 - San Francisco, United States Duration: Feb 16 2025 → Feb 20 2025

Publication series

Name	Digest of Technical Papers - IEEE International Solid-State Circuits Conference
ISSN (Print)	0193-6530

Conference

Conference	72nd IEEE International Solid-State Circuits Conference, ISSCC 2025
Country/Territory	United States
City	San Francisco
Period	2/16/25 → 2/20/25

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/ISSCC49661.2025.10904626

Cite this

Youn, D., Jeong, K., Youn, W., Seong, H., Park, Y., Ha, S., & Je, M. (2025). An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance. In 2025 IEEE International Solid-State Circuits Conference, ISSCC 2025 (pp. 482-484). (Digest of Technical Papers - IEEE International Solid-State Circuits Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISSCC49661.2025.10904626

An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance. / Youn, Donghyun; Jeong, Kyeongwon; Youn, Woongro et al.
2025 IEEE International Solid-State Circuits Conference, ISSCC 2025. Institute of Electrical and Electronics Engineers Inc., 2025. p. 482-484 (Digest of Technical Papers - IEEE International Solid-State Circuits Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Youn, D, Jeong, K, Youn, W, Seong, H, Park, Y, Ha, S & Je, M 2025, An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance. in 2025 IEEE International Solid-State Circuits Conference, ISSCC 2025. Digest of Technical Papers - IEEE International Solid-State Circuits Conference, Institute of Electrical and Electronics Engineers Inc., pp. 482-484, 72nd IEEE International Solid-State Circuits Conference, ISSCC 2025, San Francisco, United States, 2/16/25. https://doi.org/10.1109/ISSCC49661.2025.10904626

Youn D, Jeong K, Youn W, Seong H, Park Y, Ha S et al. An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance. In 2025 IEEE International Solid-State Circuits Conference, ISSCC 2025. Institute of Electrical and Electronics Engineers Inc. 2025. p. 482-484. (Digest of Technical Papers - IEEE International Solid-State Circuits Conference). doi: 10.1109/ISSCC49661.2025.10904626

Youn, Donghyun ; Jeong, Kyeongwon ; Youn, Woongro et al. / An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance. 2025 IEEE International Solid-State Circuits Conference, ISSCC 2025. Institute of Electrical and Electronics Engineers Inc., 2025. pp. 482-484 (Digest of Technical Papers - IEEE International Solid-State Circuits Conference).

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abstract = "Capacitive sensors are widely used to acquire various types of physical information. A wideinput-range fast-conversion capacitance-to-digital converter (CDC) with high resolution and energy efficiency can accommodate such diverse applications. Among prior CDC topologies, SAR [1-4] and ΔΣM CDCs [5-10] show high energy efficiency, but their input range is limited by the voltage saturation in analog blocks. Although period-modulation (PM) CDCs [11-13] can achieve a wide input range thanks to their time-domain operation without saturation, they consume a long conversion time to count many oscillation periods, resulting in poor energy efficiency. Moreover, all these topologies inevitably suffer from a trade-off between resolution and conversion time (Fig. 28.1.1(top)).",

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An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance

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