5.3.2 Standard Electrode Design

The MXG3141 electrode system is typically a coplanar 2D and 3D design. Up to five comparably smaller Rx electrodes are included in the design, providing the spatial resolution of the GestIC system. The Rx electrodes are typically arranged in a frame configuration as shown in the electrode diagrams below.

The frame defines the inside sensing area.

Larger dimensions yield higher sensitivity of the system.

For more information on sensor design, as well as the function of the center electrode, see AN2574, “2D3D Electrode Design Guide” (DS00002574).

The electrode 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 5-3. Frame Shape Electrodes (NSWE) - Front View
Figure 5-4. South-Side and North-Side Electrodes (4S1N) - Front View

The choice whether to use ‘Frame’ or ‘4S1N’ style depends on various factors. Please refer to ‘AN2574 - 2D/3D Electrode Design Guide’ for proper 2D/3D sensor design.