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Touch sensor IC features increased sensitivity

Posted: 26 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:sensor? touch sensor? Quantum Research? QTouch? Adjacent Key Suppression?

QT1081 QTouch sensor IC  rom Quantum Research Group

Quantum Research Group has released an 8-key QTouch sensor ICthe QT1081. This device offers features that simplify design and caters to a broad range of operating environments.

More sensitive
Eliminating the need for resistors on each channel has reduced external component count. The device also features increased sensitivity, by as much as four times compared to compared to its predecessor, the QT1080, which in turn has led to as much as a 50 percent power reduction under most operating conditions. Refinements made to the drift and recalibration algorithms allow the QT1081 to better adjust to rapidly changing environments.

The device features discrete outputs for ease-of-design and a user-defined low-power mode. This mode, offering microamp current drain, operates with slower response times but wakes up into its normal full speed mode as soon as a touch is detected. Spread-spectrum modulation is used to reduce false key detections caused by external fields or noise. Also incorporated is the company's patented Adjacent Key Suppression, which locks out unintentional key touches, for example, due to fingers covering more than one key on small keypads.

Economical option
The QT1081 is suited for use across a broad range of mobile, consumer appliances and personal electronics devices. The QT1081 also offers a lower price than its predecessor, making it economical for low-cost PC peripherals, MP3 players and even toys.

The QT1081 is priced below 80 cents each in OEM volumes.




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