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Capacitive Touch Sensor, 1.8 V, 5.5 V, QFN, 20 Pins, -40 °C


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Newark Part No.:
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Technical Datasheet:
AT42QT1040-MMH   Datasheet
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Product Overview

The AT42QT1040-MMH 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.
  • Up to 4 QTouch® keys
  • 4 Discrete outputs indicating individual key touch
  • Patented spread-spectrum charge-transfer (direct mode)
  • Simple self-capacitance style
  • Etched copper, silver, carbon, indium tin-oxide (ITO)
  • PCB, FPCB, plastic films, glass electrode substrates
  • Plastic, glass, composites, painted surfaces panel
  • Up to 10mm glass, 5mm plastic panel
  • Fixed key threshold, sensitivity adjusted via sample capacitor value key sensitivity
  • Adjacent key suppression


Logistics, Consumer Electronics


Exposure to absolute maximu specification conditions for extended periods may affect device reliability.

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Technical Documents (6)

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