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QT1+T+G Datasheet(PDF) 1 Page - Quantum Research Group |
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QT1+T+G Datasheet(HTML) 1 Page - Quantum Research Group |
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1 / 14 page  APPLICATIONS - Elevator buttons Toys & games Access systems Pointing devices Appliance control Security systems Light switches Industrial panels 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 common inexpensive capacitor in order to function. Average power consumption is under 20 µA in most applications, allowing battery operation. The QT118H employs digital signal processing techniques pioneered by Quantum, designed to make it survive real-world challenges, such as ‘stuck sensor’ conditions and signal drift. Sensitivity is digitally determined for the highest possible stability. No external active components are required for operation. The device includes several user-selectable built in features. One, toggle mode, permits on/off touch control, for example for light switch replacement. Another makes the sensor output a pulse instead of a DC level, which allows the device to 'talk' over the power rail, permitting a simple 2-wire twisted-pair interface. Quantum’s unique HeartBeat™ signal is also included, allowing a host controller to continuously monitor the health of the device. By using the charge transfer principle, the IC delivers a level of performance clearly superior to older technologies in a highly cost-effective package. lq ©1999-2004 Quantum Research Group R1.08 / 0405 lQ QProx™ QT118H CHARGE-TRANSFER TOUCH SENSOR Sns2 Vss Sns1 Gain Opt2 Opt1 Out Vdd 1 2 3 45 6 7 8 - QT118H-ISG -400C to +850C QT118H-DG - 00C to +700C 8-PIN DIP SOIC TA AVAILABLE OPTIONS Less expensive than many mechanical switches Projects a ‘touch button’ through any dielectric 100% autocal for life - no adjustments required No active external components Piezo sounder direct drive for ‘tactile’ click feedback LED drive for visual feedback 2.5 ~ 5V single supply operation 10 µµµµA 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 HeartBeat™ health indicator on output Pb-Free package |
Similar Part No. - QT1+T+G |
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Similar Description - QT1+T+G |
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