Robust sealed touch panels
Quantum Research Group, the charge-transfer (QT) capacitive touch company, has announced the QT60160 (16-key) and QT60240 (24 key) touch sensor chips. The devices will sense the touch of a finger through panels of any electrically insulating material. Panels can be 50mm or more in thickness when used with a scanned X-Y passive matrix.The
Like all other devices in the QMatrix family, the QT60160 and QT60240 feature adaptive automatic calibration and drift compensation for life, so no adjustment is ever necessary. In another aid to reliable operation, Quantum’s patented adjacent key suppression function ensures that if more than one key is partly covered by the operator’s finger, only the intended key registers a touch.
Traditional capacitive touch switches are susceptible to interference, particularly in the increasingly RF-rich environments now prevalent. QMatrix chips overcome this problem using spread-spectrum modulation to provide high levels of noise immunity and to minimize emissions.
The QT60160 and QT60240 come in an MLF-32 package. Prices start from $0.95 each for the 16-key part and $1.20 each for the 24 key version, based on quantities of 100,000.
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