AT42QT2160-MMU Datasheet

Atmel AT42QT2160-MMU


The AT42QT2160-MMU device is a digital burst mode charge-transfer (QT) sensor designed specifically for matrix layout touch controls; it includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. Only a few external parts are required for operation. The entire circuit can be built within a few square centimeters of single-sided PCB area. CEM-1 and FR1 punched, single-sided materials can be used for the lowest possible cost. The PCB’s rear can be mounted flush on the back of a glass or plastic panel using a conventional adhesive, such as 3M VHB two-sided adhesive acrylic film. AT42QT2160-MMU Features • Number of keys: up to 16 keys, and one slider (constructed from 2 to 8 keys)• Number of I/O lines: 11 (3 dedicated - configurable for input or output, 8 shared - output only), PWM control for LED driving• Technology: patented spread-spectrum charge-transfer (transverse mode)• Key outline sizes: 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible• Key spacings: 8 mm or wider, center to center (panel thickness dependent)• Slider design: 2 to 8 keys placed in sequence, same design as keys• Electrode design: two-part electrode shapes (drive-receive); wide variety of possible layouts• PCB layers required: one layer (with jumpers), two layers (no jumpers)• Electrode materials: PCB, FPCB, silver or carbon on film, ITO on film• Panel materials: plastic, glass, composites, painted surfaces (low particle density metallic paints possible)• Adjacent metal: compatible with grounded metal immediately next to keys• Panel thickness: up to 3 mm glass, 2.5 mm plastic (key size dependent)• Key sensitivity: individually settable via simple commands over I2C-compatible interface• Interface: I2C-compatible slave mode (100kHz)• Moisture tolerance: best in class• Power: 1.8 V to 5.5 V• Package: 28-pin 4 x 4 mm MLF RoHS compliant• Signal processing: self-calibration, auto drift compensation, noise filtering, Adjacent Key SuppressionTM technology• Applications: laptop, mobile, consumer appliances, PC peripheral etc.• Patents: AKS™ (patented Adjacent Key Suppression™) technology• This datasheet is applicable to revision 4R0 chips only


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Manufacturer information


Electrification, automation and digitalization are the long-term growth fields of Siemens. In order to take full advantage of the market potential in these fields, our businesses are bundled into eight divisions and Siemens Healthineers as well as Siemens Wind Power as a separately managed businesses.

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