SDI 2012 & 2422
SPECIALTY +5V ACCELEROMETERS
SDI's 1-axis Model 2012 and 3-axis Model 2422 MEMS DC Test & Measurement Accelerometer Modules are designed for applications in which the power supply may be limited, or if only a steady +5V DC excitation is available or preferred.
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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+5 VDC Power for Low Voltage Power Supply Systems
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Excellent Long-Term Stability
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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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Integrated 3’ Shielded Cable
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Simple Four (4) or Eight (8) Wire Connections
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Rugged Anodized Aluminum Case
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Fully Calibrated and Serialized for Traceability
The 2012 and 2422 feature an integrated 3’ cable, and both models feature one (1) or three (3) hermetically sealed, low noise SDI surface mount accelerometers, which are individually tested, programmed, and calibrated by SDI.
The 2012 and 2422 are relatively insensitive to temperature changes and gradients between -55 and +125°C. The cable’s shield is electrically connected to the case while the ground (GND) wire is isolated from the case. The robust, anodized aluminum case is epoxy sealed and can be mounted easily via two screws, an 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 Models 2012 and 2422 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 +5 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
Model 2230 Triaxial Mounting Block
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Anodized 6061-T6 aluminum 1.25" cube
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Mix and Match g-levels for custom combinations
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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 SDI Models 2460 and 2466 are the orthogonal three-axis versions of the 2210, 2260, and 2266, respectively, with similar performances.
The SDI Models 2210, 2260, and 2266 are Universal Single Axis MEMS Accelerometers ideal for most applications. They offer a cost savings for applications that need SDI’s excellent performance in standard test and measurement environments.
The Premium High-Performance SDI Models 2220 and 2276 are the high-performance single axis modules built with an upgraded SDI accelerometer chip 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 High-Performance SDI Models 2470 and 2476 are the three axis versions of the 2220 and 2276 with similarly upgraded SDI accelerometer chips and improved bias and scale factor temperature shift performance.
