FSR
®
400 Series
Data Sheet
Force
Sensing Resistors
®
Features and Benefits
• Actuation
force
as low as 0.2N
and sensitivity range to 20N
•
Cost effective
•
Ultra thin
•
Robust; up to 10M actuations
•
Simple and easy to integrate
Description
Interlink Electronics FSR
®
400
Series is part of the single
zone
Force Sensing Resistor
®
family. Force Sensing Resistors, or FSR's, are robust polymer thick film (PTF) devices that
exhibit a decrease in resistance with increase in force applied to the surface of the sensor.
This force sensitivity is optimized for use in
human machine interface
devices
including
automotive electronics, medical systems, industrial
controls
and robotics.
The FSR
400
Series sensors come in
seven
different models with four different connecting
options. A battery operated demo is available.
Call
us for more information at
+1 805-484-8855.
FSR
®
400
Short
5mm Circle x
20mm
FSR
®
400
5mm Circle x 38mm
FSR
®
402
Short
13mm
Circle x
25mm
FSR
®
402
13mm
Circle x
56mm
FSR® 404
20mm Donut with 5.5mm hold
FSR
®
406
38mm Square
x
83mm
FSR
®
408-xxx
10mm
Wide
x
xxx
mm
strip
xxx = 50, 100, 200, 300, 400, 500mm
P/N: PDS-10004-C
Human-Machine Interface Solutions for a Connected World
FSR
®
400 Series Data Sheet
Force Sensing Resistors
®
Device Characteristics
Actuation Force*
Force Sensitivity Range*
Force Resolution
Force Repeatability Single Part
Force Repeatability Part to Part
Non-Actuated Resistance
Hysteresis
Device Rise Time
Long Term Drift
1kg load, 35 days
Operating Temperature Performance
Cold: -40ºC after 1 hour
Hot: +85ºC after 1 hour
Hot Humid: +85ºC 95RH after 1 hour
Storage Temperature Performance
Cold: -25ºC after 120 hours
Hot: +85ºC after 120 hours
Hot Humid: +85ºC 95RH after 240 hours
Tap Durability
Tested to 10 Million actuations, 1kg, 4Hz
Standing Load Durability
2.5kg for 24 hours
EMI
ESD
UL
RoHS
~0.2N min
~0.2N – 20N
Continuous (analog)
+/- 2%
+/- 6% (Single Batch)
>10 Mohms
+10% Average (RF+ - RF-)/RF+
< 3 Microseconds
< 5% log10(time)
-5% average resistance change
-15% average resistance change
+10% average resistance change
-10% average resistance change
-%5 average resistance change
+30% average resistance change
-10% average resistance change
-5% average resistance change
Generates no EMI
Not ESD Sensitive
All materials UL grade 94 V-1 or better
Compliant
Specifications are derived from measurements taken at 1000 grams, and are given as (one standard deviation/mean), unless otherwise noted.
*Typical value. Force dependent on actuation interface, mechanics, and measurement electronics.
FSR
®
400 Series Data Sheet
Force
Sensing Resistor
®
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.
In the configuration
shown,
the output voltage increases with increasing force. If R
FSR
and R
M
are swapped, the output swing will decrease with increasing force. The
measuring resistor, R
M
, 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
M
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.
FSR
®
Model 400
Force
Sensing Resistor
®
Model 400:
Active Area:
Ø5.08mm
Nominal Thickness: 0.30mm
Switch Travel: 0.05mm
Sensor Mechanical Data
Available Part Numbers:
PN: 34-00007 Model 400
- No contacts or solder tabs
PN: 34-00011 Model 400
- with female contacts
PN: 34-44001 Model 400
- with female contacts and housing
PN: 30-49649 Model 400
- with solder tabs
Exploded View
FSR
®
Model 400 Short Tail
Force Sensing Resistor
®
Model 400
Short Tail:
Active Area:
Ø5.62mm
Nominal Thickness: 0.30mm
Switch Travel: 0.05mm
Sensor Mechanical Data
Available Part Numbers:
PN: 34-47021 Model 400
Short Tail
- No contacts or solder tabs
PN: 34-00005 Model 400
Short Tail
- with female contacts
PN: 34-00006 Model 400
Short Tail
- with female contacts and housing
PN: 34-00004 Model 400
Short Tail
- with solder tabs
Exploded View
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