2-6 Accele rometer – Unamplified
Model 3031
PC Board Mountable Accelerometer
Millivolt Output
Small Size
Low Cost
Vibration/Shock Monitoring
Consumer Electronics
Patient Monitoring
Crash Recorder
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 ●
DESCRIPTION
The Model 3031 is a piezoresistive silicon accelerometer in a
sur f ac e m o u nt pa c kage. I t is in t end ed for h ig h v olu me app l ic a-
tio n s w he re sm al l si ze , li g h t weig h t , and lo w cost are req u ired.
This accelerometer consis ts of a micr o machi ned sil icon
mass suspended by multiple beams from a silicon frame.
Pie zor e s ist ors loc at ed in t he be am s c hang e t hei r r es is ta nce a s t he
mo tio n o f the su sp en d e d ma ss ch an ges th e st ra in in t he be ams.
Sili con caps on the top and bottom of the devi ce are added to
provide over-range stops. This design provides for a very low
profile, high shock res istance, durability and built-in damping
over a wide usable bandwidth.
For non-surface m ount accelerom eters please see the
Models 3022, 3028, 3052 or 3058.
DIMENSIONS
PC Board Mountable Accelerometer Model 3031
Accelerometer – Unamplified
June 2001
PERFORMANCE SPECIFICATIONS
Supply Voltage: 5.0 VDC
Ambient Temperature: 25°C (Unless otherwise s pecified)
Notes
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.
ORDERING INFORMATION CONNECTIONS
PARAMETERS
RANGE
UNITS NOTES±50G ±100G ±200G ±500G
Frequency Response [MIN] 0-1000 0-1500 0-2000 0-2400 Hz 1
Mounted Resonant Frequency [MIN] 2000 3000 4000 5000 Hz
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 525 ±mV
Damping Ratio 0.4 0.7 0.9
Non-linearity 0.5 1±% Span 3
Transverse Sensitivity 1 3 ±% Span
Input & Output Resistance 2.5 3.5 6.5 kΩ
Temperature Error - Span 1.0 2.0 ±% Span 4, 5
Temperature 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
LEADER Electronic Co., Ltd - 116, Jianghuali, Jianghua Road, Jiangmen City, GD, PRC
Tel: + 86 750 3101711, 3379183 Fax: + 86 750 3388669 Website: www.leadersensors.com - e-mail: leader@leadersensors.com
