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QT320

ETC
Part Number QT320
Manufacturer ETC
Description 2 CHANNEL PROGAMMABLE ADVANCED SENSOR IC
Published Apr 16, 2005
Detailed Description LQ QPROX™ QT320 2-CHANNEL PROGAMMABLE ADVANCED SENSOR IC Two channel digital advanced capacitive sensor IC Projects tw...
Datasheet PDF File QT320 PDF File

QT320
QT320

Overview
LQ QPROX™ QT320 2-CHANNEL PROGAMMABLE ADVANCED SENSOR IC Two channel digital advanced capacitive sensor IC Projects two ‘touch buttons’ through any dielectric Cloning for user-defined sensing behavior 100% autocal - no adjustments required Only one external capacitor per channel User-defined drift compensation, threshold levels Variable gain via Cs capacitor change Selectable output polarities Toggle mode / normal mode outputs HeartBeat™ health indicator on outputs (can be disabled) 1.
8 ~ 5V supply, 60µA APPLICATIONS Light switches Industrial panels Appliance control Security systems Access systems Pointing devices Computer peripherals Entertainment devices The QT320 charge-transfer (“QT’”) touch sensor chip is a self-contained digital IC capable of detecting near-proximity or touch on two sensing channels.
It will project sense fields through almost any dielectric, like glass, plastic, stone, ceramic, and most kinds of wood.
It can also turn small metal-bearing objects into intrinsic sensors, making them respond to proximity or touch.
This capability coupled with its ability to self calibrate continuously can lead to entirely new product concepts.
It is designed specifically for human interfaces, like control panels, appliances, security systems, 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 time-out interval.
The IC requires only a common inexpensive capacitor per channel in order to function.
Power consumption and speed can be traded off depending on the application; drain can be as low as 60µA, allowing operation from batteries.
The IC’s RISC core employs signal processing techniques pioneered by Quantum; these are specifically designed to make the device survive real-world challenges, such as ‘stuck sensor’ conditions and signal drift.
Even sensitivity is digitally determined.
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