アナログ・デバイセズ社 ADXL354/ADXL355 3軸MEMS加速度計

Introduction to MEMS Accelerometers

Analog Devices Inc. (ADI) offers an array of high-performance microelectromechanical systems (MEMS) accelerometers, among which the ADXL354 and ADXL355 stand out for their precision and reliability. These devices are designed for applications requiring low noise, minimal offset drift over temperature, and low power consumption. Available in both analog (ADXL354) and digital (ADXL355) output versions, these accelerometers are integral to various high-stability and precision motion-sensing applications.

Key Features and Benefits of ADXL354/ADXL355

Exceptional Precision and Stability

The ADXL354 and ADXL355 accelerometers are renowned for their industry-leading noise performance and minimal offset drift over temperature. This level of precision and stability ensures accurate measurements critical for applications such as inertial measurement units (IMUs) and platform stabilization systems. These features make the ADXL354/ADXL355 suitable for both industrial and consumer applications.

• Noise Density: With an ultra-low noise density of 20µg/√Hz across all axes, these accelerometers ensure precise measurements.
• Offset Drift: A maximum 0g offset drift of 0.15mg/°C guarantees stability over a wide temperature range, crucial for maintaining accuracy in various environmental conditions.

Power Efficiency

Designed for low power consumption, the ADXL354/ADXL355 accelerometers are ideal for battery-operated and portable devices. Their efficient power usage extends device battery life without compromising performance.

• Measurement Mode: Consumes just 150µA (for digital output) in active measurement mode.
• Standby Mode: Only 21µA in standby mode, conserving energy when the device is not actively measuring.

Versatile Measurement Ranges

The ADXL354 and ADXL355 accelerometers offer selectable measurement ranges to cater to different application needs.

• ADXL354B: Supports ±2g and ±4g ranges.
• ADXL354C: Supports ±2g and ±8g ranges.

Robust and Reliable Packaging

Housed in a 14-terminal, 6mm x 6mm x 2.1mm LCC package, these accelerometers are hermetically sealed for long-term stability and reliability. This packaging ensures that the devices can withstand harsh environments and maintain performance over time.

Applications of ADXL354/ADXL355

Inertial Measurement Units (IMUs) and AHRS

The high precision and low noise characteristics of the ADXL354 and ADXL355 accelerometers make them ideal for inertial measurement units (IMUs) and altitude and heading reference systems (AHRS). These systems rely on accurate motion sensing to provide critical data for navigation and positioning.

Robotics

In the field of robotics, precise motion sensing is essential for navigation, balance, and control systems. The ADXL354/ADXL355 accelerometers enhance the performance and reliability of robotic platforms by providing accurate and stable measurements.

Structural Health Monitoring

For monitoring the health of buildings, bridges, and other structures, these accelerometers detect and analyze vibrations and movements. This capability helps ensure the safety and integrity of structures by identifying potential issues early.

Seismic Imaging

The ultra-low noise density and high stability of the ADXL354 and ADXL355 make them suitable for seismic imaging applications. These accelerometers can detect minute ground movements, providing valuable data for geological studies and earthquake monitoring.

Tilt Sensing and Platform Stabilization

The ADXL354 and ADXL355 accelerometers offer reliable and accurate tilt measurements, making them ideal for platform stabilization systems. These systems maintain stability in various applications, including industrial machinery and consumer electronics.

Condition Monitoring

In industrial settings, condition monitoring of machinery and equipment is crucial for preventing failures. The ADXL354/ADXL355 accelerometers detect anomalies and provide early warning signs, enabling timely maintenance and reducing downtime.

技術仕様

General Specifications

• Package: 14-terminal, 6mm x 6mm x 2.1mm LCC
• Operating Temperature Range: -40°C to 125°C
• Output Options: Analog (ADXL354) or Digital (ADXL355)

パフォーマンス

• Noise Density: 20µg/√Hz (all axes)
• 0g Offset Drift: 0.15mg/°C maximum (all axes)

電源

• VSUPPLY: 2.25V to 3.6V with internal regulators
• V1P8ANA, V1P8DIG: 1.8V typical ±10% with LDO bypassed

消費電力

• Measurement Mode: 150µA (digital output)
• Standby Mode: 21µA

Additional Features

• Integrated Temperature Sensor: Provides temperature compensation and monitoring.
• Electromechanical Self-Test: Ensures proper functioning of the accelerometer.
• Adjustable Analog Output Bandwidth: Allows tuning of the output response to suit specific applications.

結論

The ADXL354 and ADXL355 3-Axis MEMS Accelerometers from Analog Devices Inc. are powerful tools for precision motion sensing. Their combination of high precision, low noise, and low power consumption makes them suitable for a wide range of applications, from industrial automation to consumer electronics. Whether used in robotics, structural health monitoring, or seismic imaging, these accelerometers provide reliable and accurate data, enhancing the performance and reliability of various systems.

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よくある質問

Q1: What are the main differences between the ADXL354 and ADXL355?

A1: The primary difference is the output type: ADXL354 provides analog output, while ADXL355 provides digital output.

Q2: What is the typical power consumption in measurement mode for the ADXL355?

A2: The typical power consumption in measurement mode for the ADXL355 is 150µA.

Q3: Can the ADXL354/ADXL355 be used in high-temperature environments?

A3: Yes, these accelerometers can operate in temperatures ranging from -40°C to 125°C.

Q4: What are the selectable measurement ranges for the ADXL354B and ADXL354C?

A4: The ADXL354B supports ±2g and ±4g ranges, while the ADXL354C supports ±2g and ±8g ranges.

Q5: What type of package do the ADXL354/ADXL355 accelerometers come in?

A5: They come in a 14-terminal, 6mm x 6mm x 2.1mm LCC package.