AT42QT1040-MMH

ATMEL  AT42QT1040-MMH  电容式触摸传感器, 1.8 V, 5.5 V, QFN, 20 引脚, -40 °C

The is a digital burst mode, charge-transfer QT™ Capacitive Sensor Driver, designed for touch-key applications. It can sense from one to four keys-one to three keys can be disabled by not installing their respective sense capacitors. The device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. The outputs are fully debounced. Only a few external parts are required for operation. The device modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise and to suppress RF emissions.

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Up to 4 QTouch® keys

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4 Discrete outputs indicating individual key touch

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Patented spread-spectrum charge-transfer direct mode

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Simple self-capacitance style

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Etched copper, silver, carbon, indium tin-oxide ITO

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PCB, FPCB, plastic films, glass electrode substrates

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Plastic, glass, composites, painted surfaces panel

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Up to 10mm glass, 5mm plastic panel

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Fixed key threshold, sensitivity adjusted via sample capacitor value key sensitivity

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Adjacent key suppression

Stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not implied.