Force Sensors
FSA Series, Compensated/Amplified
32311096
Datasheet
FEATURES
• Wide variety of force ranges
- Newton (N): 5, 7.5, 10, 15, 20, 25
- pound (lb): 1, 1.5, 2, 3, 5
- gram (g): 500, 750
- kilogram (kg): 1, 2
• Total Error Band: ±5 %FSS
• Accuracy: ±3 %FSS
• Ratiometric analog or SPI- or I
2
C-compatible digital output
• Fully calibrated and temperature compensated over a
temperature range of 5°C to 50°C [41°F to 122°F]
• Overforce: 6804 g [15 lb]
• Supply voltage: 3.3 Vdc typ. or 5.0 Vdc typ.
• Low power consumption: 13 mW (analog) or 20 mW (digital)
• Excellent part-to-part repeatability
• Enhanced reliability
• Stable interface plunger
• Internal diagnostic functions available
• REACH and RoHS compliant
POTENTIAL APPLICATIONS
Medical:
• Ambulatory non-invasive pump pressure
• Infusion pumps
• Kidney dialysis machines
• Occlusion detection
Industrial:
• Load and compression sensing
PORTFOLIO
The FSA Series joins the FSG Series, FSS Series, FSS-SMT
Series, TBF Series, and 1865 Series.
Issue B
DESCRIPTION
The FSA Series are piezoresistive-based force sensors
offering a ratiometric analog or digital output for
reading force over the specified full scale force span and
temperature range. They are fully calibrated and temperature
compensated for sensor offset, sensitivity, temperature
effects, and nonlinearity using an on-board Application
Specific Integrated Circuit (ASIC). Direct mechanical coupling
allows for easy interface with the sensor, coupling with tubing,
membrane or a plunger, providing repeatable performance
and a reliable mechanical interface to the application. The
package also provides excellent corrosion resistance and
isolation to external package stress. All products are designed
and manufactured according to ISO 9001 standards.
VALUE TO CUSTOMERS
The FSA Series are designed to meet the customers’ need
for a compensated, amplified force sensor that provides
analog and digital outputs, a variety of force sensing ranges,
and enhanced durability and accuracy. Their flexible design
provides multiple standard configurations over a wide operating
temperature range.
DIFFERENTIATION
• Multiple force ranges allow the customer to choose the
force range to maximize sensitivity and improve system
resolution/performance
• Overforce provides enhanced durability in applications
where overforce may exist
• Enhanced accuracy includes all errors due to force non-
linearity, force hysteresis, and non-repeatability
• Total Error Band enhances system performance
• Digital output enhances performance through reduced
conversion requirements and the convenience of direct
interface to microprocessors
• Diagnostics functions allow the user to determine if the
sensor is working correctly by detecting if the electrical
paths are broken or shorted inside the sensor
• Supply voltage provides customers flexibility of design
within the application
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Force Sensors, FSA Series Compensated/Amplified
Table 1. Operating Specifications
Analog
Digital
Characteristic
Unit
Min.
Supply voltage (V
supply
):
1, 2, 3
3.3 Vdc
5.0 Vdc
Supply current:
3.3 Vdc
5.0 Vdc
Power input
Operating temperature range
4
Compensated temperature range
5
Storage temperature range
Startup time (power up to data ready)
Response time
Clipping limit:
upper
lower
SPI/I
2
C voltage level:
low
high
Pull up on SDA/MISO, SCL/SCLK, SS
Accuracy
6
Total Error Band
8
Output resolution
Long term stability
9
1
2
Typ.
3.3
5.0
2.0
2.6
13
Max.
3.6
5.25
—
—
Min.
3.0
4.75
—
—
Typ.
3.3
5.0
2.8
3.9
20
Max.
3.6
5.25
3.9
4.6
Vdc
3.0
4.75
—
—
mA
mW
0 [32]
5 [41]
-40 [-40]
—
—
—
2.5
—
—
—
—
—
—
—
—
—
—
—
1
—
—
—
—
—
—
—
—
±1.3
70 [158]
50 [122]
85 [185]
5
—
97.5
—
—
—
—
±3
±5
—
—
0 [32]
5 [41]
-40 [-40]
—
—
—
—
—
80
1
—
—
12
—
—
—
—
—
0.42
—
—
—
—
—
—
—
—
±1.3
70 [158]
50 [122]
85 [185]
3
0.84
—
—
20
—
—
±3
±5
—
—
°C [°F]
°C [°F]
°C [°F]
ms
ms
%V
supply
%V
supply
kOhm
%FSS
7
BFSL
%FSS
bits
%FSS
Sensors are either 3.3 Vdc or 5.0 Vdc based on the catalog listing selected.
Ratiometricity of the sensor (the ability of the device output to scale to the supply voltage) is achieved within the specified operating
voltage.
3
The sensor is not reverse polarity protected. Incorrect application of supply voltage or ground to the wrong pin may cause electrical
failure.
4
Operating temperature range: The temperature range over which the sensor will produce an output proportional to force.
5
Compensated temperature range: The temperature range over which the sensor will produce an output proportional to force within
the specified performance limits.
6
Accuracy: The maximum deviation in output from a Best Fit Straight Line (BFSL) fitted to the output measured over the force range
at 25°C [77°F]. Includes all errors due to force non-linearity, force hysteresis, and non-repeatability.
7
Full Scale Span (FSS): The algebraic difference between the output voltage at full scale force and the output at zero force.
8
Total Error Band (TEB): Combined error from calibration, accuracy and temperature effects over the compensated temperature
range at 5.0 V from 15 %FSS to 95 %FSS.
9
Long-term stability after 1000 hr of operation at 25°C [77°F].
2
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Force Sensors, FSA Series Compensated/Amplified
Table 2. Environmental Specifications
Characteristic
Humidity
Vibration
Shock
Life
1
1
Parameter
0% to 95% RH, non-condensing
MIL-STD-202, Method 214, Condition 1E (16.9 G)
MIL-STD-202, Method 213, Condition F (1500 G)
1 million full scale force cycles minimum
Life may vary depending on specific application in which the sensor is utilized.
Table 3. Materials
1
Component
Covers
Plunger
Substrate
Adhesives
Electronic components
1
Material
high temperature polyamide
stainless steel 316
alumina, ceramic
epoxy, silicone
ceramic silicon, glass, solder
Contact Honeywell customer service for detailed material information.
Table 4. Absolute Maximum Specifications
Characteristic
Supply voltage
Voltage on any pin
Digital interface clock frequency:
SPI
I
2
C
ESD susceptibility (human body model)
Storage temperature range
Overforce limit
Minimum operating voltage
Lead soldering time and temperature
Min.
-0.3
-0.3
50
100
2
-40 [-40]
—
Max.
6.0
V
supply
+ 0.3
Unit
Vdc
V
kHz
kV
°C [°F]
g [lb]
800
400
—
85 [185]
6804 [15]
2.8 Vdc
4 s max. at 220°C [428°F]
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3
Force Sensors, FSA Series,
Force Sensors, FSA Series Compensated/Amplified
Compensated/Ampli ed
Product Nomenclature
Figure 1. Nomenclature and Order Guide
For example,
FSAGPNXX001LCAA3
de nes an FSA Series Force Sensor, gel coupling, plunger contact element, no diagnostics,
2 lb force range, force unit in pounds, compression force type, analog output, 10% to 90% transfer function, 3.3 Vdc supply voltage
FSA G
Series
FSA
Force Sensor
Coupling
G
Gel
Contact Element
P
Plunger
Diagnostics Option
N
D
No diagnostics
Diagnostics, sensor short and open
Compensated/Amplified
P
N
XX
001
L
C
A
A
3
Supply Voltage
3
3.3 Vdc ±10%
5
5 Vdc ±10%
Transfer Function
3
A
10% to 90%
B
5% to 95%
C
20% to 80%
Output
A
Analog
S
SPI
2
I
2
C, Address 0x28
3
I
2
C, Address 0x38
4
I
2
C, Address 0x48
5
I
2
C, Address 0x58
6
I
2
C, Address 0x68
Future Use
XX
Force Range
1
Newton (N)
005
5 N
7.5
7.5 N
010
10 N
015
15 N
020
20 N
025
25 N
pound (lb)
gram (g)
001
1 lb
500
500 g
1.5
1.5 lb
750
750 g
002
2 lb
003
3 lb
005
5 lb
kilogram (kg)
001
1 kg
002
2 kg
Force Type
Compression
C
Force Unit
W
Newton (N)
pound (lb)
L
gram (g)
F
kilogram (kg)
R
COMMON CATALOG LISTINGS
FSAGPDXX010WCAA5
FSAGPDXX001RCAB5
FSAGPNXX1.5LCAC5
FSAGPNXX003LCAC5
FSAGPNXX010WC2C3
FSAGPNXX001RC4C5
FSAGPDXX005LCSB5
FSAGPDXX1.5LC5B5
Custom designations available upon request.
Consult with factory.
3
For other available transfer functions, contact Honeywell customer service.
1
2
4
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Force Sensors, FSA Series Compensated/Amplified
Figure 2. Transfer Function Limits
1
Analog Version
100
90
80
70
60
50
40
30
20
10
0
Compensated Force Range
Output (%Vsupply)
Ideal
5% Total Error Band
F
min.
Output (V) =
Digital Version
100
90
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
7
8
9
Force (example unit)
F
max.
10
0.8 x Vsupply
Force
range
x (Force
applied
) + 0.10 x Vsupply
Compensated Force Range
Output (%Vsupply)
Ideal
5% Total Error Band
F
min.
0
1
2
3
4
5
6
7
8
9
Force (example unit)
F
max.
10
Output (% of 2
14
counts) =
1
80%
x (Force
applied
) + 10%
Force
range
Transfer Function “A” is shown. See Figure 1 for other available transfer function options.
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