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QST1108YB1 Datasheet(PDF) 5 Page - STMicroelectronics |
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QST1108YB1 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 51 page QST108 Device overview 5/51 1 Device overview The QST108 capacitive touch sensor IC is a pure digital solution based on Quantum's patented charge-transfer (QProx™) capacitive technology. This technology allows users to create simple touch panel sensing electrode interfaces for conventional or flexible printed circuit boards (PCB/FPCB). Sensing electrodes are part of the PCB layout (copper pattern or printed conductive ink) and may be used in various shapes (circle, rectangular, etc.). By implementing the QProx™ charge-transfer algorithm, the QST108 detects finger presence (human touch) near electrodes behind a dielectric (glass, plastic, wood, etc.). Only one external sampling capacitor by channel is used in the measuring circuitry to control the detection. QST technology also incorporates advanced processing techniques such as drift compensation, auto-calibration, noise filtering, and Quantum's patented Adjacent Key Suppression™ (AKS™) to ensure maximum usability and control integrity. In order to meet environmental requirements, ST offers this device in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. |
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