QT118H Datasheet | QUANTUM

l Q QProx™ QT118H CHARGE-TRANSFER TOUCH SENSOR Less expensive than many mechanical switches Projects a ‘touch button’ through any dielectric 100% autocal for life - no adjustments required No active external ponents Piezo sounder direct drive for ‘tactile’ click feedback LED drive for visual feedback 2.5 ~ 5V single supply operation 10µA at 2.5V - very low power drain Toggle mode for on/off control (via option pins) 10s or 60s auto-recalibration timeout (via option pins) Pulse output mode (via option pins) Gain settings in 3 discrete levels Simple 2-wire operation possible Heart Beat™ health indicator on output Pb-Free package Vdd 1 Out 2 Opt1 3 Opt2 4 8 Vss 7 Sns2 6 Sns1 5 Gain APPLICATIONS - Light switches Industrial panels Appliance control Security systems Access systems Pointing devices Elevator buttons Toys & games The QT118H charge-transfer (“QT’”) touch sensor is a self-contained digital IC capable of detecting near-proximity or touch. It will project a sense field through almost any dielectric, like glass, plastic, stone, ceramic, and wood. It can also turn small metal-bearing objects into intrinsic sensors, making them respond to proximity or touch. This capability coupled with an ability to self calibrate continuously can lead to entirely new product concepts. The device is designed specifically for human interfaces, like control panels, appliances, toys, lighting controls, or anywhere a mechanical switch or button may be found; it may also be used for some material sensing and control applications provided that the presence duration of objects does not exceed the recalibration timeout interval. A piezo element can also be connected to create a feedback click sound. The IC requires only a mon inexpensive capacitor in order to function. Average power consumption is under 20µA in most applications, allowing battery operation. The QT118H employs digital signal processing techniques pioneered by Quantum, designed to make it survive...