How to Choose the Right MEMS DC Accelerometer for Your Application

Selecting a MEMS DC accelerometer depends on several factors: operating environment, acceleration range, power supply, size constraints, and how the sensor will be installed. This guide covers the most common considerations to help you choose the right Silicon Designs model for your needs.

Surface Mount Accelerometer Chips: What’s the Difference?

Silicon Designs’ surface mount chips all use precision MEMS variable capacitive sensing elements, but each model is built for a specific level of thermal stability, durability, or inertial performance:

• 1521 – A proven, rugged general-purpose chip used in thousands of applications. Stable, easy to integrate, and ideal for most standard environments.
• 1522 – A temperature-compensated upgrade to the 1521, with improved bias and scale factor stability across fluctuating or extreme temperatures.
• 1531 – Designed to withstand sustained operation at up to +175°C, with the same electrical performance as the 1521, but built for heat-intensive environments.

Choosing the Right G-Range

To avoid signal loss or reduced resolution, choose a g-range that closely matches the maximum expected acceleration in your application. Choosing a sensor with too high a g-range can reduce sensitivity, while too low a range can cause saturation and missed data when acceleration exceeds the sensor’s limits.

Reference points:

• A stationary object on Earth measures approximately 1G due to gravity.
• Driving around a corner typically produces less than 0.5G.
• Humans may lose consciousness at 6–8G.
• Seismic systems often use accelerometers with 2G ranges or lower.
• Automotive safety testing may require sensors rated for 200G or more.
• In free-fall, a sensor measures 0G until it impacts a surface.

SDI’s MEMS sense elements are matched to the sensor’s g-range, which also affects frequency response. Higher-g sensors accommodate more motion and may support different bandwidths than lower-g models. Always refer to the datasheet for detailed frequency and performance information.

Low-Cost vs High-Performance Modules

Low-cost modules are ideal for standard environments where no special protection is required. These use standard SDI accelerometer chips and are individually calibrated for traceability and performance.

High-performance modules are designed for applications with rapid or sustained temperature extremes. They incorporate the 1522 chip, which is individually temperature tested and corrected for greater stability in bias and scale factor.

Low-Cost Models:

• 1-Axis: 2210, 2260, 2266
• 3-Axis: 2460, 2466

High-Performance Models:

• 1-Axis: 2220, 2240, 2276
• 3-Axis: 2470, 2476

Cable Type: Integrated vs Connectorized

If the cable will remain fixed and undisturbed, an integrated cable module is the simplest option. Choose from 1-axis models 2210, 2220, 2260 or 3-axis models 2460, 2470.

If you need field flexibility, cable replacement, or custom lengths, connectorized modules are the better fit. Choose from 1-axis models 2266, 2276 or 3-axis models 2466, 2476.

Custom-length integrated cables are also available with a minimum build of 10 pieces.

How Harsh is Your Environment?

The operating environment plays a major role in module selection.

Standard Conditions

Most environments a human can tolerate without protective gear can use Low-Cost Universal Modules.

• 1-Axis: 2210, 2260, 2266
• 3-Axis: 2460, 2466

Extreme Hot/Cold

Use High-Performance models with improved temperature coefficients.

• 1-Axis: 2220, 2276
• 3-Axis: 2470, 2476

Humidity, Pressure, or Debris

Choose hermetically sealed titanium modules for sealed environments.

• 1-Axis: 2240
• 3-Axis: 2480

Power Supply Compatibility

Silicon Designs’ universal accelerometers are compatible with +8 to +32V DC and support both single-ended and differential outputs. These modules are stocked and ready to ship.

Compatible Models Include:

• 1-Axis: 2210, 2220, 2240, 2260, 2266, 2276
• 3-Axis: 2460, 2466, 2470, 2476, 2480

If your DAQ system is limited to +5V DC, Silicon Designs offers low-voltage models designed specifically for these power constraints.

+5V DC Models:

• 1-Axis: 2012
• 3-Axis: 2422 (standard), 2422H (hermetic)

Size and Mass Constraints

When space or mass is limited, compact modules are the best choice. These are about 33% smaller than standard modules and are commonly used in UAVs, portable instruments, or tight panel enclosures.

If space is not a constraint, traditional 1″ × 1″ packages may reduce cost and simplify mounting.

Compact Models:

• 2260, 2266, 2276

Standard Size Models:

• 2210, 2220

Summary

Choosing the right Silicon Designs accelerometer depends on:

• Your maximum expected acceleration (g-range).
• Temperature exposure and thermal stability requirements.
• Whether the cable needs to be fixed or replaceable.
• Power supply limitations.
• Physical constraints on space or mass.
• Environmental exposure (moisture, pressure, contaminants).

Every Silicon Designs module is rugged, individually calibrated, and designed for long-term reliability in industrial, aerospace, and test environments.

Find out more on the Silicon Designs website.