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Capacitive touch sensors feature low power consumption

Posted: 07 Nov 2005 ?? ?Print Version ?Bookmark and Share

Keywords:saelig? quantum research group? qt110? qtouch? touch sensor ic?

Saelig's new QT110

Designed for inexpensive touch controls in almost any product, Saelig Co., a U.S. distributor for Quantum Research Group in the U.K., offers the manufacturer's new QT110 family of QTouch capacitive touch sensor ICs for charge-transfer capacitive touch-sensing switch applications such as on/off buttons, appliance controls, security detection, lighting controls, intrinsically safe switches and toys/interactive games.

Featuring power consumption as low as 10?A, the QT110 family can create touch-sense fields through dielectric surfaces such as plastic or glass up to 100mm (4-inch) thick. The new QT113 and QT118H devices may be used for material, liquid or moisture sensing, and require only an external sampling capacitor and an electrode to operate. These devices include piezo beeper drive logic.

The QTouch sensor ICs feature fully debounced results, lifetime auto-calibration, drift compensation, and recalibration timeouts. They also offer a variety of response times, output polarities and toggle modes. These parts don't require any special calibration or adjustment, and automatically adjust to the build-up of dirt, moisture, and temperature variations. Most QT110 family devices are designed for human touch.

Available from stock, the QT110/113/118 devices are priced at $1.55 in quantities of 3,000. An E11x demonstration board is priced at $20. Parts and demo board are available from Saelig.

- Gina Roos

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