Control-panel chip

QT401 “slider” chip uses Quantum Research’s patented, charge-transfer sensing method to provide a reliable linear or arc-based touch-sensing output with a 7-bit resolution (1 in 128).


Control Engineering October 31, 2005

Process Control

QT401 “slider” chip uses Quantum Research’s patented, charge-transfer sensing method to provide a reliable linear or arc-based touch-sensing output with a 7-bit resolution (1 in 128). Suited to control panels where knob or linear control is needed, QT401 uses a simple, printed-circuit resistive element as the capacitive sensor. It will easily sense through 3 mm of plastic or glass, with an SPI serial signal output. Sealed sensor uses Quantum’s proprie-tary, charge-transfer, spread-spectrum sensing method to suppress EMI noise problems. Data output can be interpreted as either linear control, a series of buttons, or a combination of the two, depending on design needs. QT401 can be used with clear Indium-Tin-oxide sensing-elements to create LED-backlit touch zones, or to indicate slider position after touch is released. E401 Evaluation Board allows development of control panels with the QT401 QSlide chip.

Saelig Co. Inc.

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