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SDI 2422H HERMETIC SPECIALTY +5V ACCELEROMETERS
Hermetically sealed +5V accelerometers designed for compact systems, long-term accuracy, and sealed environmental protection.
Meet the 2422H: Hermetic +5V Sensing in a Compact, Rugged Design
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.
Key Performance Features
- Low Noise: 10 μg/√Hz Typical for ±2g Full Scale Versions
- -55 to +125°C Operating Temperature Range
- Acceleration and Vibration Sensing
- Excellent Long-Term Stability
- +5 VDC Power for Low Voltage Power Supply Systems
- ±4V Differential Output or 0.5V to 4.5V Single Ended Output
- Responds to frequencies from zero (DC) to 4000+ Hz
- Simple Eight (8) Wire Connection
- Rugged, Hermetic Titanium Case Capable of IP67
- Fully Calibrated and Serialized for Traceability
Low Power +5V Operation in a Fully Sealed Package
The 2422H was developed to meet the unique needs of systems of systems restricted to a +5V input. By combining factory-calibrated 3-axis sensing and environmental sealing, it delivers clean, reliable output without added power or signal conditioning equipment.
Thermally Stable for Consistent Performance
The 2422H provides reliable bias and scale factor accuracy across its full -55°C to +125°C operating range. Built with thermally balanced components and sealed in a titanium enclosure, it resists drift caused by rapid temperature changes. The 2422H ensures dependable performance in both indoor and outdoor systems, as well as applications where heat or cold exposure is unavoidable.
Consistent Output with Minimal Noise
Built with SDI’s proprietary 1522 surface mount accelerometer, the 2422H ensures high signal fidelity in motion tracking, vibration monitoring, and tilt applications. With differential and single-ended output options, integration into existing systems is simple and efficient.
+5V Operation for Power-Constrained Designs
The 2422H operates on a clean, regulated +5VDC input, making it ideal for systems with strict power constraints. It draws minimal current while still providing full-range, calibrated 3-axis output. With no need for signal conditioning, this accelerometer offers true plug-and-play performance in industrial environments.
Compare Specifications
| 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 |
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. SDI’s enhanced, temperature compensated, premium accelerometers 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 easy repositioning and stress-free cable replacement. 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.
Need Help Choosing the Right Accelerometer?
Performance and Packaging
Package Dimensions
Performance – All Versions
All Models: Unless otherwise specified, Vs=+8 to +32 VDC, TC=25°C, Differential Mode. Span = ±g range = 8000 mV.
| PARAMETER | MIN | TYP | MAX | UNITS |
|---|---|---|---|---|
| Bias Calibration Error (%) | 0.25 | 0.6 | ± % of span | |
| Bias Calibration Error (mV) | 25 | 60 | ± mV | |
| Scale Factor Calibration Error 1 | 0.5 | 1.25 | ± % | |
| Non-Linearity (-90 to +90% of span) 1 | 0.15 | 0.5 | ± % of span | |
| Bias Temperature Shift (Coefficient) | -200 | 0 | +200 | (PPM of span)/°C |
| Scale Factor Temperature Shift (Coefficient) | -200 | 0 | +200 | PPM/°C |
| Cross Axis Sensitivity | 2 | 3 | ± % | |
| Power Supply Rejection Ratio | 50 | >65 | dB | |
| Output Impedance | 90 / 1 | Ω | ||
| Output Common Mode Voltage | 2.5 | VDC | ||
| Operating Voltage | 4.75 | 5 | 5.25 | VDC |
| Operating Current (AOP & AON open) (2012 / 2422) | 21 | 30 | mA DC | |
| Operating Temperature | -55 | +125 | °C | |
| Mass | 24 | grams |
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.
Operational Highlights
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 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. 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 and sensitivity are reduced by half for a single-ended vs. a differential connection.
Frequently Asked Questions
Why does the accelerometer read zero G's when it's in free fall?
All accelerometers are used to measure increasing or decreasing acceleration, and they can detect vibration because it is a change in acceleration between multiple directions. Free fall, by definition, is a static acceleration, which means the object may be moving, but its acceleration is not changing at all. SDI’s MEMS DC accelerometer technology allows it to measure free fall because it doesn’t require any change of acceleration to supply data, and therefore it will report back 0g of acceleration.
How do I choose the right g-range for my application?
The g-range of your accelerometer should match the maximum acceleration your system is expected to experience—but avoid going unnecessarily high. Selecting too high of a g-range can reduce measurement clarity, while too low of a range can cause the sensor to saturate if the acceleration exceeds its limit. Also consider the frequency response. Each Silicon Designs sensor has a MEMS sense element tuned to its specific g-range, which affects its frequency range and noise profile. Be sure to check the product datasheet or visit our How To Choose Your Accelerometer guide for more detailed recommendations. You can also reach out to our team for help identifying the best fit for your application.
My accelerometer appears to be broken. When I place it on the desk with the lid facing up, it reads +1G. How do I fix this?
SDI’s MEMS DC accelerometers are designed to respond to the Earth’s gravity. If you are on Earth, then you are in a +1g gravitational field. Turn the device over and you will see a -1g reading, which you can use to perform your own bias calibration of the device. Visit our Technology page to learn more about how SDI’s accelerometers work. Also see the How to Calibrate Your Accelerometer page for how to use this feature for self-calibration.
Do I need a charge amplifier or signal conditioning to use my Silicon Designs MEMS DC accelerometer module?
All Silicon Designs MEMS DC accelerometers feature integrated amplifiers, so an additional one is not required. Signal conditioning is optional.
Are Silicon Designs plug-&-play MEMS DC accelerometer modules waterproof? What is their IP designation?
While all modules are considered weatherproof, only Models 2240 and 2480 may be used while submerged. We recommend the protection of the connector from exposure. Please Contact Us prior to use, and we’ll walk you through the process. The IP designation of the other modules is IP61.
Optional Accessories
MODEL 2232 MAGNETIC MOUNTING BLOCK
- INFO
- Rugged blue anodized aluminum construction
- Block mass = 23 grams
MODEL 2235 1-AXIS STUD MOUNT BLOCK
- INFO
- Rugged black anodized aluminum construction
- Block mass = 6.2 grams
Explore Other +5V Accelerometers
MODEL 2012 1-AXIS MODULE
- INFO
- STATS
- APPLICATIONS
- Power: +5 VDC
-
Output:
- Differential: +/- 4 V
- Single Ended: +0.5V to +4.5V
- Connection: Integrated Cable
- Mass: 8 grams
- Package: Anodized Aluminum
- Temperature: -55 to +125°C
-
Available:
- 2g
- 5g
- 10g
- 25g
- 50g
- 100g
- 200g
- 400g
- simulator sensors
- infotainment system development
- automotive vibration
- education
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MODEL 2422 3-AXIS MODULE
- INFO
- STATS
- APPLICATIONS
- Power: +5 VDC
-
Output:
- Differential: +/- 4 V
- Single Ended: +0.5V to +4.5V
- Connection: Integrated Cable
- Mass: 30 grams
- Package: Anodized Aluminum
- Temperature: -55 to +125°C
-
Available:
- 2g
- 5g
- 10g
- 25g
- 50g
- 100g
- 200g
- 400g
- Deep sea pipelines
- Radar system sensor
- Earthquake warning system
- Flight test data
- Classroom tools
Sales and Support
Reliable Customer Support from Start to Finish
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Our sales team is available to assist with pricing, lead times, and customized solutions tailored to your specific needs. We work closely with you to ensure you get the best accelerometer solution for your application.
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Tech Support
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