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
Active low (QT110), active high (QT110H) versions
QT110 / QT110H
QTOUCH™ SENSOR ICs
The QT110 / QT110H charge-transfer (“QT’”) sensor chips are self-contained digital ICs used to implement near-proximity or touch
sensors. They project sense fields through almost any dielectric, like glass, plastic, stone, ceramic, and wood. They 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.
These devices are 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.
These ICs require only a common inexpensive capacitor in order to function. Average power consumption is under 20µA in most
applications, allowing battery operation.
The devices employ digital signal processing techniques pioneered by Quantum, designed to make them 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 devices include 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 sensor health.
By using the charge transfer principle, these ICs deliver a level of performance clearly superior to older technologies in a highly
00C to +700C
00C to +700C
-400C to +850C
-400C to +850C
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