The QT110 charge-transfer (“QT’”) sensor IC is a self-contained digital IC used to implement near-proximity or touch sensors. It projects sense fields 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 leads to entirely new product concepts.
The QT110 is designed specifically for human interfaces, like control panels, appliances, toys, lighting controls, or anywhere a mechanical switch or button may be found; they 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.

● 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 packages

APPLICATIONS
♦ Elevator buttons
♦ Consumer electronics
♦ Access systems
♦ Pointing devices
♦ Appliance control
♦ Security systems
♦ Light switches
♦ Industrial panels