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Part Number:AT42QT1050
Manufacturer:Microchip
Category:Touch and Ges ture
Availability:2073
Description:Configurations: Comms modeNumber of Keys: 1 to 5 keys (or 1 to 4 keys plus a Guard Channel)Technology: Patented spread-spectrum QTouchADC charge-transferKey Outline Sizes: 6 mm × 6 mm or larger (panel thickness dependent); widely different sizes and shapes possibleLayers Required: OneElectrode Materials: Etched copper; Silver; Carbon; Indium Tin Oxide (ITO)Panel Materials: Plastic; Glass; Composites; Painted surfaces (low particle density metallic paints possible)Up to 10 mm glass (electrode size dependent)Up to 5 mm plastic (electrode size dependent)Key Sensitivity: Individually settable using simple commands over I2C interfaceInterface: I2C slave mode (400 kHz). Discrete detection outputsSelf-calibrationAuto-drift compensationNoise filteringAdjacent Key Suppression® (AKS®) – up to three groups possibleMoisture Tolerance: Increased moisture tolerance based on hardware design and firmware tuningPower Saving: Low Power (LP) mode supports both Low Power and Deep Sleep modesPower: 1.8 V to 5.5 V12-ball WLCSP RoHS-compliant IC20-pin VQFN RoHS-compliant IC
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Detailed Product Description
The Atmel(R) AT42QT1050 is a QTouchADC(TM) sensor driver. The device can sense from one to five keys, dependent on mode. The QT1050 includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions, and the outputs are fully debounced. Only a few external parts are required for operation and no external Cs capacitors are required. The QT1050 modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise, and to suppress RF emissions. The QT1050 uses a QTouchADC method of acquisition. This provides greater noise immunity and eliminates the need for external sampling capacitors, allowing touch sensing using a single pin.
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