SDI 2422H HERMETIC
SPECIALTY +5V ACCELEROMETERS
The Model 2422H Specialty Hermetic MEMS DC Accelerometer from Silicon Designs (SDI) is low-cost, integrated plug-and-play measurement device suitable for a wide array of demanding applications where power supply options are limited to +5 V DC. The 2422H provides enhanced performance over temperature in zero to medium frequency applications experiencing large or rapid temperature variations or maintaining hot or cold extremes for extended periods of time and environmental conditions require a hermetic package.
AVAILABLE
G-RANGES
± 2 g
± 5 g
± 10 g
± 25 g
± 50 g
± 100 g
± 200 g
± 400 g
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Low Noise: 10 μg/rootHz Typical for ±2g Full Scale Versions
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-55 to +125°C Operating Temperature Range
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Acceleration and Vibration Sensing
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Excellent Long-Term Stability
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+5 VDC Power for Low Voltage Power Supply Systems
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±4V Differential Output or 0.5V to 4.5V Single Ended Output
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Responds to frequencies from zero (DC) to 2000+ Hz
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Simple Eight (8) Wire Connection
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Rugged, Hermetic Titanium Case Capable of IP67
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Fully Calibrated and Serialized for Traceability
The SDI Model 2422H contains three orthogonally mounted, proprietary SDI Model 1522 accelerometer LCC chips, making them even less sensitive to temperature changes and gradients from -55 to +125°C and greatly reducing bias and scale factor temperature shifts for premium performance. Their enhanced, temperature compensated, premium accelerometer LCCs are individually tested, calibrated and verified in a climate chamber. The 2422H comes with an initial calibration report featuring additional information about the linearity, output, phase, and frequency response as tested for each unit.
SDI Model 2422H accelerometers are packaged in rugged, hermetically-sealed, titanium cases, and connectors allow for customized cable lengths and easy repositioning. The cases are rated IP67; the connector is rated IP61 and can meet IP67 when sealed with a boot, sleeve, or heat shrink. The case is easily mounted via two screws, adhesive, or by attaching a magnet.
ZERO TO MEDIUM FREQUENCY APPLICATIONS
g Range | Sensitivity,
Differential | Frequency Response (Typ, 3 dB) | Frequency Response
(Min, 3 dB) | Frequency Response
(Typ, 5%) | Output Noise, Differential
(RMS, Typ) | Max. Mechanical
Shock (0.1 ms) |
|---|---|---|---|---|---|---|
g | mV/g | Hz | Hz | Hz | μg/(root Hz) | g (peak) |
±2 | 2000 | 0 – 525 | 0 – 300 | 0 – 250 | 10 | 2000 |
±5 | 800 | 0 – 800 | 0 – 420 | 0 – 400 | 15 | 2000 |
±10 | 400 | 0 – 1100 | 0 – 660 | 0 – 700 | 23 | 5000 |
±25 | 160 | 0 – 1750 | 0 – 1050 | 0 – 1300 | 38 | 5000 |
±50 | 80 | 0 – 2100 | 0 – 1400 | 0 – 1600 | 60 | 5000 |
±100 | 40 | 0 – 3000 | 0 – 1700 | 0 – 1700 | 121 | 5000 |
±200 | 20 | 0 – 3600 | 0 – 2100 | 0 – 1900 | 243 | 5000 |
±400 | 10 | 0 – 4200 | 0 – 2400 | 0 – 2000 | 475 | 5000 |
OPERATION
SDI Model 2422H Specialty +5 VDC Hermetic MEMS DC Accelerometers provide optimal performance when they are connected to instrumentation in a differential configuration using both the AOP and AON output signals, but they also support single ended operation for complete flexibility.
These accelerometers produce differential analog output voltage pairs (AON & AOP) which vary with acceleration. The signal outputs are fully differential about a common mode voltage of approximately 2.5 volts. At zero acceleration, the output differential voltage is nominally 0 volts DC; at ±full scale acceleration, the output is ±4 volts DC, respectively, as shown in the figure (below). The output scale factor is independent from the supply voltage of +8 to +32 volts.
When a differential connection is not possible, SDI recommends connecting the accelerometer to instrumentation in single ended mode by connecting AOP and GND to the instrumentation and leaving AON disconnected. Keep in mind that the signal to noise ratio is reduced by half for a single-ended vs. a differential connection.
PERFORMANCE - ALL VERSIONS
All Models: Unless otherwise specified, Vs=+8 to +32 VDC, TC=25°C, Differential Mode. Span = ±g range = 8000 mV.
Note (1): For 2g thru 50g only; 100g and greater versions are tested and specified from -65 to +65g.
NOTICE: Stresses greater than those listed may cause permanent damage to the device. These are maximum stress ratings only. Functional operation of the device at or above these conditions is not implied.
PACKAGE DIMENSIONS
Please see the data sheet for sensor location and other additional details.
OPTIONAL ACCESSORIES
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10 lbs / 4.6 KG pull force
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Rated for use up to +/-50G
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Low mass: 23 grams
Model 2235 Stud Mount Adaptor Block
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Stud mount Adaptor for any SDI module
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Anodized 6061-T6 aluminum block
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6.2 grams, 0.7” x 1” footprint
+8 to +32 VDC POWER VERSIONS
Silicon Designs provides an all-encompassing Universal Accelerometer Module Family for applications with higher voltage available. SDI’s Universal Accelerometer Modules support +8 to +32V DC, and onboard voltage regulation and an internal voltage reference eliminate the need for precision power supplies.
The Premium High-Performance SDI Models 2470 and 2476 modules are built with upgraded SDI accelerometer chips inside. These high-performance chips reduce the bias and scale factor temperature shift performance, a valuable benefit for applications experiencing large or rapid temperature variations or maintaining hot or cold extremes for extended periods of time.
The Premium Hermetic High-Performance SDI Model 2480 modules are also built with upgraded SDI accelerometer chips for demanding temperature environments. They are housed in a rugged, hermetic, titanium case identical to the 2422H for environments that also incorporate moisture or atmospheric concerns.
