Model 3052 þ Vibration/Shock Monitoring PC Board Mountable Accelerometer þ Modal Analysis Millivolt Output þ Motion Control Integral Temperature Compensation þ Crash Testing þ Aerospace DESCRIPTION The Model 3052 is a piezoresistive silicon accelerometer with integral temperature compensation. It is packaged on a ceramic substrate with an epoxy sealed ceramic cover and is designed for adhesive mounting. The 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. Each sensor is individually serialized. For an accelerometer with a mounting bracket which can be FEATURES used to bolt the sensor to the mounting location see the Model þ Adhesive Mount 3058. For uncompensated accelerometers, please refer to the þ ±0.5% Non-linearity (typical) Models 3022 and 3028. þ ±1.0% Temperature Performance (typical) þ DC Response þ Built-in Damping þ Built-in Overrange Stops þ Low Power STANDARD RANGES 2-20 Range g Range g ±2 ● ±20 ● ±5 ● ±50 ● ±10 ● ±100 ● Accelerometer – Unamplified Model 3052 PC Board Mountable Accelerometer CALIBRATION DATA Figure 1. Calibration Data Sheet A calibration data sheet similar to the sample shown above is included with each unit. The calibration sheet provides the measured test and calibration data for the sensor. CONNECTIONS PIN NUMBER RESISTOR FUNCTION 1 GROUND 2 ICS USE ONLY 3 SUPPLY 4 -OUTPUT 5 +OUTPUT FUNCTION OHMS R1 Rzb 10-50 R2 Rset 250-350 R3 Rlo 800-1250 R5 Rhi 7.5K-50K R6 Rstc 3K-99K R7 Rztc 0.15M-4M April 2000 Accelerometer – Unamplified 2-21 Model 3052 PC Board Mountable Accelerometer PERFORMANCE SPECIFICATIONS Supply Voltage: 5.0 VDC Ambient Temperature: 25°C (Unless otherwise specified) RANGE PARAMETERS Frequency Response [MIN] Mounted Resonant Frequency [MIN] Sensitivity (MIN/MAX) ±2g ±5g ±10g UNITS NOTES 0-250 0-300 0-400 Hz 1, 2 700 800 1000 Hz 1 6.0/9.0 2.4/3.6 1.2/1.8 mV/g 1, 3 UNITS NOTES RANGE PARAMETERS ±20g ±50g ±100g Frequency Response [MIN] 0-600 0-1000 0-1500 Hz 1, 2 Mounted Resonant Frequency [MIN] 1500 2000 3000 Hz 1, 4 0.6/0.9 0.24/0.36 0.12/0.18 mV/g 1, 3 TYP MAX UNITS NOTES 1 2 ±mV 0.7 0.9 0.5 1 ±% Span 1 3 ±% Span Sensitivity (MIN/MAX) PARAMETERS MIN Zero Acceleration Output Damping Ratio 0.4 Non-linearity Transverse Sensitivity Output Resistance 2.5 1 1, 4 5 3.5 6.5 KΩ Temperature error - Sensitivity 1.0 2.0 ±% Span 1, 6 Temperature error - Zero 1.0 2.0 ±% Span 1, 6 Supply Voltage 5.0 10.0 VDC Current 1.5 mA Output Noise 1.0 µV p-p MΩ 7 20X Rated 8 Output Load Resistance 5 Acceleration Limits (Any Direction) Operating Temperature –40°C to +125°C Compensated Temperature Range 0°C to +50°C Storage Temperature –55°C to +150°C Weight 6.5 Grams Notes 1. Actual test data for this parameter is included on the calibration sheet included with each sensor. A sample of this calibration sheet is shown as Figure 1. 5. Best Fit Straight Line. For full scale ranges of 10g or less, the maximum non-linearity is ±2%. 6. Compensated temperature range: 0°C to +50°C in reference to 25°C. 2. The useful frequency range is defined as the range of frequencies over which the device sensitivity is within ±5% of the DC value. 7. Prevents increase of TC-Span and sensitivity decrease due to output loading. 3. Positive voltage change for positive acceleration; negative voltage change for negative acceleration. 8. 400g for ±2g, ±5g and ±10g versions, 20X or 2000g, whichever is lower, for other versions. 4. For sensors having resonant frequency greater than 5 kHz, the calibration data sheet will indicate “>5 kHz”. In addition, the damping ratio will indicate N/A. 2-22 Accelerometer – Unamplified PC Board Mountable Accelerometer Model 3052 DIMENSIONS LTR 2 - 10 g 20 - 500 g “A” DIM 0.300 ± 0.005 [7.62 ± 0.13] 0.265 ± 0.005 [6.73 ± 0.13] “B” DIM 0.250 ± 0.005 [6.35 ± 0.13] 0.240 ± 0.005 [6.10 ± 0.13] “C” DIM 0.032 ± 0.004 [0.81 ± 0.10] 0.032 ± 0.004 [0.81 ± 0.10] ORDERING INFORMATION 3052 - 005 - P Electrical Connection (P = Pins) Acceleration Range Model April 2000 Accelerometer – Unamplified 2-23