Accelerometers
2-6 Accelerometer Selection Guide–Unamplified
Model 3031
• Vibration/Shock Monitoring
• Consumer Electronics
• Patient Monitoring
• Crash Recorder
PC Board Mountable
Millivolt Output
Small Size
Low Cost
DESCRIPTION
The Model 3031 is a piezoresistive silicon accelerometer in a
surface mount package. It is intended for high volume appli-
cations where small size, light weight, and low cost are
required.
This accelerometer consists of a micro machined silicon
mass suspended by multiple beams from a silicon frame.
Piezoresistors located in the beams change their resistance as
the motion of the suspended mass changes the strain in the
beams.
Silicon caps on the top and bottom of the device are
added to provide over-range stops. This design provides for a
very low profile, high shock resistance, durability and built-in
damping over a wide usable bandwidth.
For non-surface mount accelerometers please see Models
3022, 3028, 3052 or 3058.
DIMENSIONS
FEATURES
•Surface Mount Package
•±0.5% Non-linearity (typical)
•±1.0% Temperature Performance
(with comp resistors-typical)
•DC Response
•Built-in Damping
•Built-in Overrange Stops
•Low Power
STANDARD RANGES
Range g
±50 •
±100 •
±200 •
±500 •
Internet:www.msiusa.com
Tel: 1-757-766-1500
North America Toll Free: 1-800-745-8008
Fax: 1-757-766-4297
Accelerometers
Accelerometer Selection Guide–Unamplified 2-7
Model 3031
PC Board Mountable Accelerometer
PERFORMANCE SPECIFICATIONS
Supply Voltage: 5.0 VDC
Ambient Temperature: 25°C (Unless otherwise specified)
Dec 2002
CONNECTIONS
ORDERING INFORMATION
RANGE
______________________________________________________________
PARAMETERS ±50G ±100G ±200G ±500G UNITS NOTES
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Frequency Response [MIN] 0-1000 0-1500 0-2000 0-2400 Hz 1
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Mounted Resonant Frequency [MIN] 2000 3000 4000 5000 Hz
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Sensitivity (MIN/MAX) 0.6/1.5 0.3/0.6 0.15/0.3 0.06/0.15 mV/g 2
PARAMETERS MIN TYP MAX UNITS NOTES
__________________________________________________________________________________________________________________________________________________
Zero Acceleration Output 5 25 ±mV
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Damping Ratio 0.4 0.7 0.9
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Non-linearity 0.5 1 ±% Span 3
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Transverse Sensitivity 1 3 ±% Span
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Input & Output Resistance 2.5 3.5 6.5 kΩ
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Temperature Error - Span 1.0 2.0 ±% Span 4, 5
__________________________________________________________________________________________________________________________________________________
emperature Error - Zero 1.0 2.0 ±% Span 4, 5
__________________________________________________________________________________________________________________________________________________
Supply Voltage 5.0 10.0 VDC
__________________________________________________________________________________________________________________________________________________
Output Noise 1.0 µV p-p 6
__________________________________________________________________________________________________________________________________________________
Output Load Resistance 5 MΩ
__________________________________________________________________________________________________________________________________________________
Acceleration Limits (Any Direction) 20X Rated 7
__________________________________________________________________________________________________________________________________________________
Operating Temperature -40°C to +125°C
__________________________________________________________________________________________________________________________________________________
Storage Temperature -55°C to +150°C
__________________________________________________________________________________________________________________________________________________
Weight 0.3 Grams
1. The frequency response is defined as the range of frequencies over
which the device sensitivity is within ±5% of the DC value.
2. Output voltage increases for positive acceleration; output voltage
decreases for negative acceleration.
3. Best Fit Straight Line.
4. Percentage values are with external compensation.
5. Compensated temperature range: 0-50°C in reference to 25°C.
6. 10 Hz to 1 kHz.
7. 20X or 2000g, whichever is less.
8. Solder on pads is 62% Tin, 36% Lead, 2% Silver. Maximum allowable
temperature during mounting is 220°C for 1 minute. Contact factory if a
higher mounting temperature will be used.
Notes
