AT42QT1070-SSUR

The AT42QT1070-SSU 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.

• Comms and standalone mode configurations
• 1 to 7 keys (or 1 to 6 keys plus a guard channel) comms mode
• 1 to 4 keys plus a fixed guard channel on key 0 standalone mode
• 5-output standalone mode
• Patented spread-spectrum charge-transfer technology
• 6 x 6mm or Larger (Panel Thickness Dependent), Widely Different Sizes and Shapes Possible
• 1 PCB layer required
• Etched copper, silver, carbon and indium tin oxide (ITO) electrode materials
• Plastic, Glass, Composites and Painted surfaces possible Panel Materials
• Up to 10mm glass, up to 5mm Plastic (electrode size dependent) panel thickness
• Individually settable via simple commands over I²C-compatible interface Comms mode
• Discrete detection outputs interface
• Self-calibration, auto drift compensation, noise filtering, adjacent key suppression® (AKS®)

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