A 15nW per Button Noise-Immune Readout IC for Capacitive Touch Sensor

Said Hussaini; Hui Jiang; Paul Walsh; Dermot MacSweeney; Kofi A.A. Makinwa

doi:10.1109/ESSCIRC.2018.8494283

A 15nW per Button Noise-Immune Readout IC for Capacitive Touch Sensor

Said Hussaini, Hui Jiang, Paul Walsh, Dermot MacSweeney, Kofi A.A. Makinwa

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

1 Citation (Scopus)

Abstract

This paper presents a readout IC that uses an asynchronous charge-redistribution-based capacitance-to-digital-converter (CDC) to digitize the capacitance of a touch sensor. Thanks to the power efficient tracking algorithm, the CDC consumes negligible power consumption in the absence of touch events. To facilitate stand-alone or wake-on-touch applications, the CDC can be periodically triggered by a co-integrated ultra-low power relaxation oscillator. At a 38 Hz scan-rate, the readout IC consumes 15 nW per touch sensor, which is the lowest reported to date.

Original language	English
Title of host publication	ESSCIRC 2018 - IEEE 44th European Solid State Circuits Conference
Place of Publication	Piscataway, NJ
Publisher	IEEE
Pages	78-81
Number of pages	4
ISBN (Electronic)	978-153865404-0
DOIs	https://doi.org/10.1109/ESSCIRC.2018.8494283
Publication status	Published - 2018
Event	ESSCIRC 2018: 44th IEEE European Solid State Circuits Conference - Dresden, Germany Duration: 3 Sep 2018 → 6 Sep 2018 Conference number: 44

Conference

Conference	ESSCIRC 2018
Country	Germany
City	Dresden
Period	3/09/18 → 6/09/18

Keywords

Asynchronous tracking logic
CDC
Stand-alone touch sensor
Ultra-low power oscillator

Access to Document

10.1109/ESSCIRC.2018.8494283

Link to publication in Scopus

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Cite this

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title = "A 15nW per Button Noise-Immune Readout IC for Capacitive Touch Sensor",

abstract = "This paper presents a readout IC that uses an asynchronous charge-redistribution-based capacitance-to-digital-converter (CDC) to digitize the capacitance of a touch sensor. Thanks to the power efficient tracking algorithm, the CDC consumes negligible power consumption in the absence of touch events. To facilitate stand-alone or wake-on-touch applications, the CDC can be periodically triggered by a co-integrated ultra-low power relaxation oscillator. At a 38 Hz scan-rate, the readout IC consumes 15 nW per touch sensor, which is the lowest reported to date.",

keywords = "Asynchronous tracking logic, CDC, Stand-alone touch sensor, Ultra-low power oscillator",

author = "Said Hussaini and Hui Jiang and Paul Walsh and Dermot MacSweeney and Makinwa, {Kofi A.A.}",

year = "2018",

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A 15nW per Button Noise-Immune Readout IC for Capacitive Touch Sensor. / Hussaini, Said; Jiang, Hui; Walsh, Paul; MacSweeney, Dermot; Makinwa, Kofi A.A.

ESSCIRC 2018 - IEEE 44th European Solid State Circuits Conference. Piscataway, NJ : IEEE , 2018. p. 78-81 8494283.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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