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 shown configuration, the output voltage increases with increasing force. If RFSR
and RM are swapped, the output swing will decrease with increasing force. The
measuring resistor, RM, is chose 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. VOUT curves is shown on the graph below for a standard FSR in a
voltage divider configuration with various RM 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.