Motion Sensors - Accelerometers

Part Number	Description / PDF	Quantity
CMCP780A STI Vibration Monitoring	COMPACT ACCEL, 100 MV/G SIDE EXI	50
CMCP793V-500 STI Vibration Monitoring	VEL TRANSDUCER 500 MV/IN/SEC TOP	50
MMA7360LR2 Freescale Semiconductor, Inc. (NXP Semiconductors)	MMA7360, THREE AXIS LOW-G MICRO	48516
834M1-6000 TE Connectivity Measurement Specialties	ACCELEROMETER 6000G IEPE SMD	30
LIS3DHHTR STMicroelectronics	ACCELEROMETER 2.5G SPI 16CCLGA	2
MMA6263Q Freescale Semiconductor, Inc. (NXP Semiconductors)	MMA6263, PLUS/MINUS 1.5G DUAL A	18
MMA2612KW Freescale Semiconductor, Inc. (NXP Semiconductors)	DSI2.5 ACCELEROMETER, 12V, X, 12	70
MMA1725W Freescale Semiconductor, Inc. (NXP Semiconductors)	DSI3 ACCELEROMETER, QFN 16	65
KX126-1063 ROHM Semiconductor	ACCELEROMETER 2-8G I2C/SPI 12LGA	0
KX003-1077 ROHM Semiconductor	ACCELEROMETER 2-16G I2C 12LGA	0
ADXL345TCCZ-EP Analog Devices, Inc.	ACCEL 2-16G I2C/SPI 14LGA	604
MMA6525KCWR2 NXP Semiconductors	ACCELEROMETER 105G SPI 16QFN	0
ADXL335BCPZ-RL7 Analog Devices, Inc.	ACCELEROMETER 3G ANALOG 16LFCSP	0
ADXL355BEZ-RL7 Analog Devices, Inc.	ACCEL 2-8G I2C/SPI 14CLCC	500
793R Wilcoxon (Amphenol Wilcoxon Sensing Technologies)	ACCEL IEPE SENSOR	0
AD22301 Analog Devices, Inc.	SINGLE AXIS IMEMS ACCELEROMETER	2585
ADIS16006CCCZ Analog Devices, Inc.	ACCELEROMETER 5G SPI 12LGA	0
ADXL327BCPZ-RL7 Analog Devices, Inc.	ACCELEROMETER 2G ANALOG 16LFCSP	0
ADXL345BCCZ-RL7 Analog Devices, Inc.	ACCEL 2-16G I2C/SPI 14LGA	30000
BU-23173-000 Knowles	ACCELEROMETER	103

Motion Sensors - Accelerometers

1. Overview

Accelerometers are motion sensors that measure acceleration forces (static or dynamic) along one or multiple axes. These devices convert mechanical motion into electrical signals, enabling quantitative analysis of vibration, tilt, shock, and dynamic movement. As core components in modern sensing systems, accelerometers play critical roles in consumer electronics, industrial automation, automotive safety systems, and aerospace navigation.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Capacitive MEMS	High sensitivity, low power consumption, digital output	Smartphones, wearable devices
Piezoelectric	Self-powered, excellent frequency response	Vibration analysis, impact detection
Piezoresistive	High shock tolerance, analog output	Automotive crash testing, industrial monitoring
Servo (Force-Balance)	Ultra-high precision, low noise	Inertial navigation, seismic monitoring
Optical MEMS	Immune to electromagnetic interference	High-precision scientific instruments

3. Structure and Components

Typical accelerometers consist of: - Seismic mass with specific inertial properties - Elastic suspension elements (springs or beams) - Displacement detection circuit (capacitive, piezoelectric, or resistive) - Temperature compensation circuitry - Signal conditioning electronics - Protective housing (metal/ceramic/polymer) Modern MEMS devices integrate microstructures on silicon substrates with digital interfaces (I2C/SPI).

4. Key Technical Specifications

Parameter	Description	Importance
Measurement Range	2g to 500g	Determines application suitability
Resolution	0.1mg to 10mg	Impacts measurement precision
Frequency Response	DC to 10kHz	Affects dynamic signal capture
Nonlinearity	0.1% to 1% FS	Measurement accuracy indicator
Temperature Range	-40 C to +150 C	Environmental reliability
Power Consumption	5 A to 10mA	Battery life consideration

5. Application Fields

Consumer Electronics: Smartphones (screen rotation), gaming controllers
Automotive: Airbag deployment, electronic stability control (ESC)
Industrial: Predictive maintenance systems, vibration monitoring
Healthcare: Fall detection devices, rehabilitation equipment
Aerospace: Flight control systems, structural health monitoring
Case Study: iPhone's ADXL345 MEMS accelerometer enables step counting and orientation detection

6. Leading Manufacturers

Manufacturer	Representative Product	Key Features
Analog Devices	ADXL345	3-axis, 13-bit resolution, I2C interface
STMicroelectronics	LSM6DSO	6-axis IMU, AI-enabled edge computing
Bosch Sensortec	BMI270	Low-power wearable sensor, 16Hz noise
TE Connectivity	KX134-1211	400g high-shock measurement
Honeywell	QA-750	Tactical-grade servo accelerometer

7. Selection Guidelines

Determine required measurement axes (1D/2D/3D)
Match range/sensitivity with application requirements
Assess environmental conditions (temperature, vibration)
Select appropriate output interface (analog/digital)
Evaluate power consumption constraints
Consider calibration requirements and long-term stability

8. Industry Trends

Key development directions include: - MEMS technology advancement towards atomic-scale sensitivity - Integration with gyroscopes and AI processing (smart sensors) - Wireless sensor network compatibility - Increased adoption in autonomous vehicles and IoT edge devices - Development of ultra-low-power wake-up accelerometers - Fiber optic accelerometer systems for aerospace applications - Enhanced shock survivability for industrial harsh environments