8.5 Layout Recommendation

This section provides a brief description of layout hints for a proper system design.

The PCB layout requirements for MGC3140 follow the general rules for a mixed signal design. In addition, there are certain requirements to be considered for the sensor signals and electrode feeding lines.

The chip must be placed as close as possible to the electrodes to keep their feeding lines as short as possible. Furthermore, it is recommended to keep MGC3140 away from electrical and thermal sources within the system.

A two-layer PCB layout is sufficient to enable analog and digital signals to be separated from each other to minimize crosstalk.

The individual electrode feeding lines must be kept as far as possible apart from each other. V_DD lines must be routed as wide as possible.

MGC3140 requires a proper ground connection on all V_SS pins which can be connected together.