±100g Single Axis Accelerometer with Analog Output# ADXL190EM1 Technical Documentation
*Manufacturer: Analog Devices Inc. (ADI)*
## 1. Application Scenarios
### Typical Use Cases
The ADXL190EM1 is a high-performance MEMS accelerometer designed for precision motion sensing applications requiring exceptional accuracy and reliability. This single-axis accelerometer operates with a full-scale range of ±50g, making it suitable for demanding industrial and aerospace environments.
Primary Applications:
- Structural Health Monitoring : Continuous vibration analysis in bridges, buildings, and industrial infrastructure
- Aerospace Systems : Flight control systems, inertial navigation, and aircraft structural monitoring
- Industrial Machinery : Predictive maintenance systems for rotating equipment, turbines, and heavy machinery
- Automotive Testing : Crash testing, vehicle dynamics analysis, and durability testing
- Seismic Monitoring : Earthquake detection and geological survey equipment
### Industry Applications
Aerospace & Defense
- Aircraft health and usage monitoring systems (HUMS)
- Missile guidance systems
- Satellite attitude control
- Vibration analysis in turbine engines
Industrial Automation
- Condition-based monitoring in manufacturing plants
- Robotics motion control and safety systems
- Precision equipment alignment
- Vibration analysis in production machinery
Research & Development
- Laboratory instrumentation
- Prototype testing and validation
- Academic research in dynamics and vibration analysis
### Practical Advantages and Limitations
Advantages:
- High Accuracy : Typical sensitivity of 40mV/g with excellent linearity (±0.2% of full scale)
- Wide Bandwidth : DC to 10kHz frequency response suitable for dynamic measurements
- Low Noise : 500μg/√Hz noise density enabling precise low-level vibration detection
- Robust Construction : Hermetically sealed ceramic package withstands harsh environments
- Temperature Stability : Built-in temperature compensation maintains accuracy across -40°C to +85°C
Limitations:
- Single-Axis Measurement : Requires multiple units for 3-axis sensing applications
- Power Requirements : Typically requires ±5V supplies, limiting battery-operated applications
- Cost Consideration : Premium pricing compared to consumer-grade accelerometers
- Size Constraints : Larger footprint than modern MEMS devices (0.8" × 0.8" × 0.28")
## 2. Design Considerations
### Common Design Pitfalls and Solutions
Pitfall 1: Improper Power Supply Decoupling
- Issue : High-frequency noise affecting measurement accuracy
- Solution : Implement 0.1μF ceramic capacitors close to power pins with 10μF tantalum bulk capacitors
Pitfall 2: Inadequate Signal Conditioning
- Issue : Aliasing and signal distortion
- Solution : Use anti-aliasing filters with cutoff frequency set to 80% of sampling rate
Pitfall 3: Thermal Management
- Issue : Temperature gradients causing measurement drift
- Solution : Maintain uniform board temperature and avoid heat sources near the sensor
Pitfall 4: Mechanical Mounting
- Issue : Stresses affecting sensor performance
- Solution : Use compliant mounting and avoid overtightening screws (recommended torque: 2-3 in-lbs)
### Compatibility Issues with Other Components
Analog-to-Digital Converters
- Requires high-resolution ADCs (16-bit minimum recommended)
- Ensure compatible input voltage ranges
- Match sampling rates to accelerometer bandwidth
Microcontrollers/Processors
- Verify sufficient processing capability for data rates up to 20kSPS
- Consider interface requirements (parallel vs serial)
- Account for computational overhead for signal processing
Power Management
- Compatible with standard ±5V power supplies
- Consider power sequencing requirements
- Account for typical 10mA current consumption per axis
### PCB Layout Recommendations
General Layout Guidelines
- Place decoupling capacitors within 5
