AT42QT1070-SSU

ATMEL  AT42QT1070-SSU  电容式触摸传感器, I2C, 1.8 V, 5.5 V, SOIC, 14 引脚, -40 °C

The is a digital burst mode charge-transfer capacitive Sensor Driver. The device can sense from one to seven keys, dependent on mode. It has the optimized architecture where no external components are required and only 1-pin per channel. It includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions and the outputs are fully de-bounced. It modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise and to suppress RF emissions. It uses a dual-pulse 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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Comms and Standalone Mode Configurations

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1 to 7 Keys or 1 to 6 Keys Plus a Guard Channel Comms Mode

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1 to 4 Keys Plus a Fixed Guard Channel on Key 0 Standalone Mode

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5-output Standalone Mode

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Patented Spread-spectrum Charge-transfer Technology

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6 x 6mm or Larger Panel Thickness Dependent, Widely Different Sizes and Shapes Possible

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1 PCB Layer Required

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Etched Copper, Silver, Carbon and Indium Tin Oxide ITO Electrode Materials

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Plastic, Glass, Composites and Painted surfaces possible Panel Materials

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Up to 10mm Glass, up to 5mm Plastic Electrode Size Dependent Panel Thickness

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Individually settable via simple commands over I²C-compatible interface Comms mode

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I²C-compatible Slave Mode 400kHz, Discrete Detection Outputs Interface

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Self-calibration, Auto Drift Compensation, Noise Filtering, Adjacent Key Suppression® AKS®