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MGC3130 Datasheet(PDF) 11 Page - Microchip Technology |
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MGC3130 Datasheet(HTML) 11 Page - Microchip Technology |
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11 / 40 page  2012 Microchip Technology Inc. Advance Information DS41667A-page 11 MGC3130 3.3.2 STANDARD ELECTRODE DESIGN The MGC3130 electrode system is typically a double- layer design with a Tx transmit electrode at the bottom layer to shield against device ground and thus, ensure high receive sensitivity. Up to five comparably smaller Rx electrodes are placed above the Tx layer providing the spatial resolution of the GestIC system. Tx and Rx are separated by a thin isolating layer. The Rx electrodes are typically arranged in a frame configuration as shown in Figure 3-3. The frame defines the inside sensing area with maximum dimensions of 20x20 centimeters. An optional fifth electrode in the center of the frame may be used to improve the distance measurement and add simple touch functionality. The electrodes’ shapes can be designed solid or structured. In addition to the distance and the material between the Rx and Tx electrodes, the shape structure density also controls the capacitance CRXTX and thus, the sensitivity of the system. FIGURE 3-3: FRAME SHAPE ELECTRODES Note: Ideal designs have low CRxTx and CRxG to ensure higher sensitivity of the electrode system. Optimal results are achieved with CRxTx and CRxG values being in the same range. South Center North Top Layer (Lateral Rx) Top Layer (Center Rx) Tx Layer |
Similar Part No. - MGC3130_12 |
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Similar Description - MGC3130_12 |
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