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 techn.
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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 components Piezo sounder direct drive for ‘tactile’ click feedback LED drive for visual feedback 2.5 ~ 5V single supply operation 10µA at 2.
QT118H Datasheet
