FMA SERIES

32347833
Issue CMicroForce Sensors, Compensated/Amplified
DESCRIPTIONDIFFERENTIATIONThe FMA Series are piezoresistive-based• Multiple force ranges allow theforce sensors offering a digital output

customer to choose the force range

for reading force over the specified

to maximize sensitivity and improvefull scale force span and temperaturesystem resolution/performance

range. They are fully calibrated and• Smaller package allows for spacetemperature compensated for sensor
offset, sensitivity, temperature effects,
and nonlinearity using an on-board
Application Specific Integrated Circuit(ASIC). Direct mechanical coupling

constrained applications• Robust design provides enhanced
durability in applications whereoverforce may exist• Enhanced accuracy includes all

allows for easy interface with theerrors due to force non-linearity, force

sensor, coupling with tubing, membrane

hysteresis, and non-repeatability

or a plunger, providing repeatableperformance and a reliable mechanicalinterface to the application. All products• Reduced Total Error Band enhances
system performance• Digital output enhances performanceare designed and manufactured

through reduced conversionaccording to ISO 9001 standards. These

requirements and the convenience ofproducts offer a more stable output

direct interface to microprocessors

which is directly proportional to the force• Diagnostic functions allow the user

applied to the mechanically-coupled

to determine if the sensor is working

sphere.

correctly by detecting if electrical paths

The FMA Series is available with pocket

are broken or shorted inside the sensor

tape and reel packaging.

VALUE TO CUSTOMERS• Selectable supply voltages provide
customers with design flexibility

The FMA Series are designed to meet

POTENTIAL APPLICATIONS

the customer’s need for a compensated,

MEDICALamplified force sensor which provides• Infusion pumps

digital outputs, a variety of force• Ambulatory pumps

sensing ranges, a small, cost-effective• Enteral feeding pumps

format, and enhanced durability and• Kidney dialysis machines

accuracy. The flexible design provides

INDUSTRIAL

multiple standard configurations overa wide operating temperature range.

• Load and compression sensing• Touch panels• Switch replacement• Robotic equipment• Weight measurement• Force/grip measuring equipmentFEATURES• Small form factor: 5 mm x 5 mm
[0.20 in x 0.20 in]• Accuracy: ±2 %FSS typical• SPI- or I2C-compatible digital output• Fully calibrated and temperaturecompensated over a temperature
range of 5°C to 50°C [41°F to 122°F]• Available in a wide variety of standard
and configurable force ranges• Overforce: 3X force range• Supply voltage: 3.3 Vdc typ. or 5.0 Vdc typ.
• Low power consumption: 14 mW• Enhanced part-to-part repeatability• Enhanced reliability• Stable, stainless steel sphere interface• Internal diagnostic functions available• REACH and RoHS compliant
The FMA Series joins the
FSA Series, FSG Series, FSS
Series, FSS-SMT Series, TBF
Series, and 1865 Series ForceSensors. To view the entire
product portfolio, click here.

MICROFORCE SENSORS, FMA SERIESTABLE 1. ABSOLUTE MAXIMUM SPECIFICATIONSCHARACTERISTICMINIMUM

TYPICALMAXIMUM

UNIT

Supply voltage

-0.3

—

6.0

Vdc

Voltage on any pin-0.3—

Vsupply + 0.3

V

Digital clock frequency:
SPI
I2C

50100—800400kHz

ESD susceptibility (human body model)

8——kV-40 [-40]—

85 [185]

Storage temperature range

Overforce limit——
Repeated exposure to the overforce may cause permanent damage to the sensor.

°C °[F]

3X force range—11

TABLE 2. OPERATING SPECIFICATIONSCHARACTERISTICMINIMUM

TYPICALMAXIMUM

UNIT

3.0
4.75

3.3
5.0

3.6
5.25

Vdc

—
—

2.8
3.9

3.9
4.6

mA

—

20—mW

-40 [-40]—

85 [185]°C °[F]5 [41]—

50 [122]°C °[F]-40 [-40]—

85 [185]°C °[F]

Startup time (power up to data ready)——3msResponse time—

0.420.84

msSPI/I2C voltage level:lowhigh—
80

—
—

20
—

Vsupply

Pull up on SDA/MISO, SCL/SCLK, SS1——kOhmAccuracy—±2—%FSS7 BFSL

Total Error Band8——±8%FSS

Output resolution

12——

bitsLong term stability

—

±1.6

—

%FSS

Supply voltage (Vsupply)1, 2, 3:
3.3 Vdc
5.0 Vdc
Supply current:
3.3 Vdc
5.0 Vdc
Power input
Operating temperature range

4Compensated temperature range

5Storage temperature range

6Sensors are either 3.3 Vdc or 5.0 Vdc based on the catalog listing selected.
2
Ratiometricity of the sensor (the ability of the device output to scale to the supply voltage) is achieved within the specified
operating voltage.
3The 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.
6Accuracy: The maximum deviation in output from a Best Fit Straight Line (BFSL) fitted to the output measured over the force
range with single load-unload cycle at 25°C. 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.
8Total Error Band (TEB): Combined error from calibration, accuracy and temperature effects over the compensated temperature
range at 5.0 V from 20 %FSS to 80 %FSS.
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MICROFORCE SENSORS, FMA SERIESTABLE 3. ENVIRONMENTAL SPECIFICATIONSCHARACTERISTIC

PARAMETER

Humidity

0% to 95% RH, non-condensing

Vibration

MIL-STD-202, Method 214, Condition 1F (20.71 Gms)

Shock

MIL-STD-202, Method 213, Condition A (50 G)Life
1 million full scale force cycles minimumLife may vary depending on specific application in which the sensor is utilized.
11TABLE 4. MATERIALSCOMPONENTMATERIAL1Coversliquid crystal polymer

Sphere contact element

stainless steel 440C

Substrate

FR4Adhesives

epoxy, silicone

Electronic components
Contact Honeywell customer service for detailed material information.

silicon, glass, solder

1FIGURE 1. TRANSFER FUNCTION LIMITS
Compensated Force Range

Output (% 214 Counts)

100

Ideal
+8% Total Error Band

90807060504030
20
10001234Fmin.
Output (% of 214 counts) =5Force

678910Fmax.

60%x (Forceapplied) + 20%
Forcerange

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MICROFORCE SENSORS, FMA SERIESFIGURE 2. NOMENCLATURE AND ORDER GUIDEFor example, FMAMSDXX025WCSC3 defines an FMA Series Force Sensor, compensated/amplified,mechanically coupled, sphere contact element, sensor short and open diagnostics, 25 N force range,
force unit in N, compression force type, SPI digital output, 20% to 80% transfer function, 3.3 Vdc
supply voltage1

FMA

M

MicroForce TypeSensors
AS

D

Coupling Contact
Element

Compensated/amplified

OptionCode0252

OptionCode 1

N No diagnostics
D Sensor short and open diagnostics

WForceRange

XX Future placeholder

S SphereM MechanicalXXForceUnitCForce
TypeW Newton (N)005 5 (Newtons)
015 15 (Newtons)
025 25 (Newtons)

C Compression

SOutput
S SPI
2 I2C, Address 0x28
3 I2C, Address 0x38
4 I2C, Address 0x48
5 I2C, Address 0x58
6 I2C, Address 0x68
7 I2C, Address 0x78

C33Transfer
Function

SupplyVoltage
3 3.3 V +10%
5 5.0 V +5%

A 10% to 90%
C 20% to 80%

Custom configurations are available upon request. Please contact Honeywell Sales.
Three characters specify the desired force level; allowable characters are the numbers 0 through 9. See Table 5 for currently configurable force ranges.
3For other available transfer functions, contact Honeywell Customer Service.
1
2

Note: Breakout boards, designed for use with the Honeywell SEB002 Sensor Evaluation Kit, are available with the FMA Series sensor already mounted. Please contact
your Honeywell representative for details.

TABLE 5. FMA SERIES AVAILABILITY1CATALOG LISTINGFORCERANGEFMAMSDXX005WCSC3OUTPUTSPIFMA Series Force Sensor, compensated/amplified, mechanicallycoupled, sphere contact element, sensor short and open
diagnostics, 5 N force range, compression force type, SPI digitaloutput, 20% to 80% transfer function, 3.3 V ±10% supply voltage

I2C, address 0x28

FMA Series Force Sensor, compensated/amplified, mechanicallycoupled, sphere contact element, sensor short and open
diagnostics, 5 N force range, compression force type, I2C digital
output, address 0x28, 20% to 80% transfer function, 3.3 V ±10%supply voltage

SPI

FMA Series Force Sensor, compensated/amplified, mechanicallycoupled, sphere contact element, sensor short and open
diagnostics, 15 N force range, compression force type, SPI digital
output, 20% to 80% transfer function, 3.3V ±10% supply voltage

I2C, address 0x28

FMA Series Force Sensor, compensated/amplified, mechanicallycoupled, sphere contact element, sensor short and open
diagnostics, 15 N force range, compression force type, I2C digital
output, address 0x28, 20% to80% transfer function, 3.3 V ±10%supply voltage

SPI

FMA Series Force Sensor, compensated/amplified, mechanicallycoupled, sphere contact element, sensor short and open
diagnostics, 25 N forcerange, compression force type, SPI digital
output, 20% to 80% transfer function, 3.3 V ±10% supply voltage

I2C, address 0x28

FMA Series Force Sensor, compensated/amplified, mechanicallycoupled, sphere contact element, sensor short and open
diagnostics, 25 N force range, compression force type, I2C digital
output, address 0x28, 20% to 80% transfer function, 3.3 V ±10%supply voltage

5N
FMAMSDXX005WC2C3FMAMSDXX015WCSC315 N
FMAMSDXX015WC2C3FMAMSDXX025WCSC325 N
FMAMSDXX025WC2C314DESCRIPTION

These catalog listings are production released and are readily available. Other configurations per Figure 2 are possible; however,minimum order quantity thresholds and NRE may apply. Please consult the factory.

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MICROFORCE SENSORS, FMA SERIESFIGURE 3. SENSOR MOUNTING DIMENSIONS (FOR REFERENCE ONLY: MM/[IN].),TABLE 6. PINOUT,PIN
123456,,,,,SPI
VS
SS
GND
SCLKMISONC

TABLE 7. SPHERE FORCE VS HEIGHT,Sphere height(See Table 7.)

FUNCTION
I2 CVSNCGND
SCLSDANC,FORCE(N)SPHERE HEIGHT (MM)515250,293 ±0,0750,393 ±0,075
0,483 ±0,075,

Solder Pad Layout(viewed from top)

Recommended Land Pattern,,,,,,,,,,,,,,,,,,,,,,,,Sensing and Internet of Things

5MICROFORCE SENSORS, FMA SERIESFIGURE 4. REEL MOUNTING DIMENSIONS (FOR REFERENCE ONLY: MM/[IN], ALL DIMENSIONS COMPLY WITH EIA-481-1.),::,,,,,,,,

6

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MICROFORCE SENSORS, FMA SERIESFIGURE 5. TAPE MOUNTING DIMENSIONS (FOR REFERENCE ONLY: MM/[IN], ALL DIMENSIONS COMPLY WITH EIA-481-1.)

Note: FMA Series products are shipped intape and reel packaging with a Minimum
Order Quantity (MOQ) of 160 pieces. Themaximum tape and reel quantity is 960
pieces per reel.

CAUTION
ELECTROSTATICSENSITIVE
DEVICESDO NOT OPEN OR HANDLE
EXCEPT AT A
STATIC FREE WORKSTATIONESD SENSITIVITY:
CLASS 3B

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ADDITIONAL MATERIALSWARRANTY/REMEDY

The following associated literature isavailable at sensing.honeywell.com:

Honeywell warrants goods of its
manufacture as being free of defective
materials and faulty workmanshipduring the applicable warranty period.
Honeywell’s standard product warranty
applies unless agreed to otherwise by
Honeywell in writing; please refer toyour order acknowledgment or consult
your local sales office for specificwarranty details. If warranted goods
are returned to Honeywell during theperiod of coverage, Honeywell will
repair or replace, at its option, withoutcharge those items that Honeywell,in its sole discretion, finds defective.
The foregoing is buyer’s sole remedy
and is in lieu of all other warranties,
expressed or implied, including thoseof merchantability and fitness for aparticular purpose. In no event shall
Honeywell be liable for consequential,special, or indirect damages.

• Product range guide• Technical notes:- MicroForce Sensor Coupling- Overforce Design Considerations- Force Sensor Diagnostics- Digital Output Force Sensors I2C
Communications- Digital Output Force Sensors SPICommunications• Other technical notes• Application notes• Sell Sheets• CAD Models

m WARNINGPERSONAL INJURY
DO NOT USE these products as safetyor emergency stop devices or in anyother application where failure of theproduct could result in personal injury.
Failure to comply with these
instructions could result in death orserious injury.

m WARNINGMISUSE OFDOCUMENTATION••The information presented in thisproduct sheet is for reference
only. Do not use this document as
a product installation guide.
Complete installation, operation,and maintenance information
is provided in the instructions
supplied with each product.

Failure to comply with these
instructions could result in death orserious injury.
While Honeywell may provide
application assistance personally,through our literature and theHoneywell web site, it is buyer’ssole responsibility to determine
the suitability of the product in theapplication.
Specifications may change without
notice. The information we supply isbelieved to be accurate and reliable
as of this writing. However, Honeywellassumes no responsibility for its use.

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