Datasheet

Connector Information

Application Information

For specific application needs please contact Interlink Electronics support team.

An Integration Guide and Hardware Development Kit (HDK) are also available.

FSR's are two-wire devices with a resistance that depends on applied

force. Below is a force vs. resistance graph that illustrates a typical FSR

response characteristic. Please note that the graph values are reference only

and actual values are dependent upon actuation system mechanics and

sensor geometry.

For simple force-to-voltage conversion, the FSR device is tied to a measuring

resistor in a voltage divider (see figure below) and the output is described by the

following equation.

Force Sensing Resistor

FSR

400 Series Data Sheet

In the configuration shown, the output voltage increases with increasing force. If R

FSR

and R

are swapped, the output swing will decrease with increasing force. The

measuring resistor, R

, is chosen to maximize the desired force sensitivity range and

to limit current. Depending on the impedance requirements of the measuring circuit,

the voltage divider could be followed by an op-amp.

A family of force vs. V

OUT

curves is shown on the graph below for a standard FSR in a

voltage divider configuration with various R

resistors. A V+ of 5V was used for these

examples. Please note that the graph values are for reference only and will vary between

different sensors and applications.

Refer to the FSR Integration Guide for more integration methods and techniques.