Motion Sensors - Accelerometers

Part Number	Description / PDF	Quantity
KXCNL-1010-FR ROHM Semiconductor	ACCELEROMETER 2-8G I2C 16LGA	294
ADXL372BCCZ-RL Analog Devices, Inc.	ACCELEROMETER 200G SPI 16LGA	0
CMCP785T-M8 STI Vibration Monitoring	ACCEL&TMP 100MV/G 10MV/C SIDE M8	50
LIS2DH12TR STMicroelectronics	ACCEL 2-16G I2C/SPI 12LGA	0
ADXL203CE Analog Devices, Inc.	ACCELEROMETER 1.7G ANALOG 8LCC	2289
CMCP797V STI Vibration Monitoring	VEL TRANSDUCER 100 MV/IN/SEC SID	100
832M1-0500 TE Connectivity Measurement Specialties	ACCELEROMETER 500G IEPE SMD	34
ADXL325BCPZ Analog Devices, Inc.	ACCELEROMETER 5G ANALOG 16LFCSP	748
MXC62320MP MEMSIC	ACCELEROMETER 2G I2C 8QFN	2528
820M1-0025 TE Connectivity Measurement Specialties	ACCELEROMETER	0
KXR94-2050-FR ROHM Semiconductor	ACCELEROMETER 2G ANALOG 14DFN	0
MMA2301EG Freescale Semiconductor, Inc. (NXP Semiconductors)	ANALOG CIRCUIT, CMOS, PDSO16	62
SCA610-E23H1A-1 TOKO / Murata	ACCELEROMETER 1.5G ANALOG 8SMD	138
ADXL362BCCZ-RL Analog Devices, Inc.	ACCELEROMETER 2-8G SPI 16LGA	2813
CMCP786A STI Vibration Monitoring	GENERAL ACCEL, 100 MV/G TOP	100
805-0500-01 TE Connectivity Measurement Specialties	ACCELEROMETER 500G IEPE TO5	19
MMA5212KW Freescale Semiconductor, Inc. (NXP Semiconductors)	PSI5 ACCELEROMETER, 12V, X, 120G	54
KX122-1037 ROHM Semiconductor	ACCELEROMETER 2-8G I2C/SPI 12LGA	15250
MMA5206KW Freescale Semiconductor, Inc. (NXP Semiconductors)	PSI5 ACCELEROMETER, 12V, X, 60G,	45
ADXL206HDZ Analog Devices, Inc.	ACCELEROMETER 5G ANALOG 8CSBDIP	34

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