Model 3031 PC Board Mountable Accelerometer 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 the 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 2-6 Range g 50 100 200 500 Accelerometer - Unamplified Model 3031 PC Board Mountable Accelerometer PERFORMANCE SPECIFICATIONS Supply Voltage: 5.0 VDC Ambient Temperature: 25C (Unless otherwise specified) RANGE PARAMETERS Frequency Response [MIN] Mounted Resonant Frequency [MIN] Sensitivity (MIN/MAX) 50G 100G 200G 500G 0-1000 0-1500 0-2000 2000 3000 4000 0.6/1.5 0.3/0.6 0.15/0.3 PARAMETERS MIN Zero Acceleration Output Damping Ratio 0.4 Non-linearity Transverse Sensitivity UNITS NOTES 0-2400 Hz 1 5000 Hz 0.06/0.15 mV/g 2 NOTES TYP MAX UNITS 5 25 mV 0.7 0.9 0.5 1 % Span 1 3 % Span 3 3.5 6.5 k 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 Input & Output Resistance 2.5 Output Noise 1.0 Output Load Resistance Acceleration Limits (Any Direction) Operating Temperature V p-p 6 M 5 20X Rated 7 -40C to +125C Storage Temperature -55C to +150C Weight 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. 5. 6. 10 Hz to 1 kHz. 2. Output voltage increases for positive acceleration; output voltage decreases for negative acceleration. 7. 20X or 2000g, whichever is less. 8. 3. Best Fit Straight Line. 4. Percentage values are with external compensation. 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. ORDERING INFORMATION Compensated temperature range: 0-50C in reference to 25C. CONNECTIONS June 2001 Accelerometer - Unamplified Feel free to contact customer service with any questions at Toll free 1(800)745-8008; Phone (757)766-1500; Fax (757)766-4297 2-7