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    Manufacturer: Atmel / Quantum Research

    This product is discontined. Please email quotes@saelig.com for recommendations.


    Custom Ordered - MOQ 3K 

    Note:  Product ships in 6-Pin WSON package

    The QT100A charge-transfer ('QT') touch sensor is a self-contained digital IC capable of detecting near-proximity or touch. It will project a touch or proximity field through any dielectric like glass, plastic, stone, ceramic, and even most kinds of wood. It can also turn small metal-bearing objects into intrinsic sensors, making them responsive to proximity or touch. This capability, coupled with its ability to self-calibrate, can lead to entirely new product concepts. It is designed specifically for human interfaces, like control panels, appliances, toys, lighting controls, or anywhere a mechanical switch or button may be found.

    Power consumption is around 600µA in most applications when running in Fast response mode. This typically drops to 6-12µA at 2V Vdd in Low Power mode, depending on the burst length. In most cases the power supply need only be minimally regulated; for example, by Zener diodes or an inexpensive three-terminal regulator. The QT100A only requires a common inexpensive X7R ceramic capacitor in order to function. 

    The QT100A employs signal processing techniques pioneered by Quantum; these are specifically designed to make the device survive real-world challenges, such as 'stuck sensor' conditions and signal drift.

    The Quantum-pioneered HeartBeat™ signal is also included, allowing a microcontroller to monitor the health of the QT100A continuously, if desired. By using the charge transfer principle, the IC delivers a level of performance clearly superior to older technologies.


    • 2V to 5V single supply operation
    • 10µA low power mode @ 2V
    • Self-calibrating on power-up
    • Sensitivity easily adjusted
    • Consensus filter for noise immunity
    • Auto recalibration timeout
    • HeartBeat™ health indicator on output
    • Only a few passive external parts required
    • RoHS compliant 6-WSON package


    • Home appliances
    • Toys
    • Lighting controls
    • Stereo systems and TV



    This product supersedes the QT118H-DN, QT115, QT118H-DG and the QT115H.

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