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