QT118H-G中文资料CHARGE-TRANSFER TOUCH SENSOR数据手册Quantum规格书

描述 Description

OVERVIEW
The QT118H is a digital burst mode charge-transfer (QT) sensor designed specifically for touch controls; it includes all hardware and signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. Only a few low cost, non-critical discrete external parts are required for operation.
Figure 1-1 shows the basic QT118H circuit using the device, with a conventional output drive and power supply connections. Figure 1-2 shows a second configuration using a common power/signal rail which can be a long twisted pair from a controller; this configuration uses the built-in pulse mode to transmit the output state to the host controller.● 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 2.5V - 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 packageAPPLICATIONS -
● Elevator buttons
● Toys & games
● Access systems
● Pointing devices
● Appliance control
● Security systems
● Light switches
● Industrial panels