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

APPLICATIONS -

• Elevator buttons

• Toys & games

• Access systems

• Pointing devices

• Appliance control

• Security systems

• Light switches

• Prox sensors