Low voltage hermetic MEMS variable capacitive accelerometers

19th July 2018

Enaie Azambuja

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Silicon Designs has announced the global market introduction of its Model 2422H low-voltage, specialty hermetic, MEMS variable capacitive accelerometer modules. Available in eight unique models, with standard ranges from ±2g to ±400g, the Model 2422H series is designed for zero-to-medium frequency vibration and acceleration sensing, in commercial and industrial applications where a hermetically sealed case and +5VDC regulated power supply are absolute requirements.

Design of the Model 2422H series incorporates Silicon Designs’ own MEMS accelerometer chip, for an enhanced bias and scale factor over temperature performance specification that is unmatched in the industry, along with long-term stability.

Modules are packaged in a rugged, IP67 rated, hermetically sealed lightweight titanium case, for added protection from moisture, dust, corrosion, and other contaminants. Units are easily mounted via two screws, adhesive, or a magnet. The IP61 rated connector of the Model 2422H meets IP67 requirements when sealed with a boot, sleeve, or heat shrink.

The Model 2422H series produces differential analog output voltage pairs (AON & AOP) which vary with acceleration. Signal outputs are fully differential about a common mode voltage of approximately 2.5V.

Modules can support either a ±4V differential or 0.5V to 4.5V single ended output, for complete measurement flexibility. They can also respond to both DC and AC (0 to 2000+Hz) acceleration.

At zero acceleration, differential voltage output is nominally 0VDC; at ± full-scale acceleration, it is ±4VDC. Units are also relatively insensitive to temperature changes and gradients over a standard operating temperature range of -55°C to +125°C. Each accelerometer module is shipped directly from the factory fully calibrated and serialised for traceability.

All of Silicon Designs MEMS variable capacitive accelerometers and chips are 100% designed, manufactured, and tested at the company’s state-of-the-art facility in Kirkland, Washington, USA. This includes the manufacture of the chips and dies themselves.

The completely vertically integrated manufacturing processes of Silicon Designs allow the company to offer high-quality products at still-highly competitive pricing, along with some of the industry’s shortest lead times. Standard model quantities can typically ship in less than two weeks.