Model 3031 PC Board Mountable * Vibration/Shock Monitoring Millivolt Output * Consumer Electronics Small Size * Patient Monitoring Low Cost * Crash Recorder DESCRIPTION The Model 3031 is a piezoresistive silicon accelerometer in a surface mount package. It is intended for high volume applications 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. Accelerometers 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 I n t e r n e t : w w w. m s i u s a . c o m Te l : 1 - 7 5 7 - 7 6 6 - 1 5 0 0 N o r t h A m e r i c a To l l F r e e : 1 - 8 0 0 - 7 4 5 - 8 0 0 8 Fax: 1-757-766-4297 2-6 Accelerometer Selection Guide-Unamplified PC Board Mountable Accelerometer Model 3031 PERFORMANCE SPECIFICATIONS Supply Voltage: 5.0 VDC Ambient Temperature: 25C (Unless otherwise specified) RANGE ______________________________________________________________ PARAMETERS 50G 100G 200G 500G UNITS NOTES __________________________________________________________________________________________________________________________________________________ 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 5 25 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 k __________________________________________________________________________________________________________________________________________________ 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 V p-p 6 __________________________________________________________________________________________________________________________________________________ Output Load Resistance 5 M __________________________________________________________________________________________________________________________________________________ Acceleration Limits (Any Direction) 20X Rated 7 __________________________________________________________________________________________________________________________________________________ Operating Temperature -40C to +125C __________________________________________________________________________________________________________________________________________________ Storage Temperature -55C to +150C __________________________________________________________________________________________________________________________________________________ 0.3 Grams 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. ORDERING INFORMATION 5. 6. 7. 8. Compensated temperature range: 0-50C in reference to 25C. 10 Hz to 1 kHz. 20X or 2000g, whichever is less. Solder on pads is 62% Tin, 36% Lead, 2% Silver. Maximum allowable temperature during mounting is 220C for 1 minute. Contact factory if a higher mounting temperature will be used. Accelerometers Weight CONNECTIONS Dec 2002 Accelerometer Selection Guide-Unamplified 2-7