QT113-S Datasheet



The QT113 charge-transfer (“QT’”) touch sensor is a self-contained digital IC capable of detecting near-proximity or touch. It will project a proximity sense field through air, via almost any dielectric, like glass, plastic, stone, ceramic, and 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 continuously can lead to entirely new product concepts.

Projects a proximity field through air
Less expensive than many mechanical switches
Sensitivity easily adjusted via capacitor value
Turns small objects into intrinsic touch sensors
100% autocal for life - no adjustments required
2.5 to 5V, 600µA single supply operation
Toggle mode for on/off control (strap option)
10s, 60s, infinite auto-recal timeout (strap options)
Gain settings in 2 discrete levels
HeartBeat™ health indicator on output
Active-low (QT113) or active-high outputs (QT113H)
Only one external part required - a 1¢ capacitor

Elevator buttons
Toys & games
Access systems
Pointing devices
Appliance control
Security systems
Light switches
Prox sensors



Manufacturer information


Quantum Research Group was acquired by Atmel.

Quantum Research Group is the leading independent developer of capacitive sensing IP and solutions for user interfaces. Offering a wide variety of touch and proximity sensing solutions, Quantum Research Group is the leading independent supplier of capacitive sensing solutions. Quantum Research Group innovative touchpad navigation technologies support a wide range of markets and applications.

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