What should be considered when selecting ESD protection devices for the touchscreen and communication interfaces of an infusion pump?

User interaction interfaces and communication interfaces are susceptible to electrostatic discharge. The key to selecting protection devices lies in balancing protection strength with signal integrity. For high-speed or high-sensitivity interfaces such as touchscreens and buttons, multi-channel TVS arrays with low clamping voltage and extremely low parasitic capacitance must be chosen. Low clamping voltage ensures rapid discharge of electrostatic current to protect downstream chips, while extremely low parasitic capacitance prevents attenuation or distortion of touch signals or high-speed data signals. For communication buses such as RS485 or CAN, specialized bus protection devices should be selected. These devices can withstand higher surge impacts while maintaining signal eye diagram quality and can be paired with common-mode chokes to suppress common-mode interference on the lines.