Low g iMEMS® Accelerometers

Low g iMEMS ® Accelerometers ,[object Object]

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is Accelerometer? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Five Types of Motion Sensing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Accelerometer Acceleration Vibration Shock Tilt Gyroscope Rotation

MEMS Accelerometers ,[object Object],[object Object]

Gravity Measurements ,[object Object],[object Object],[object Object],[object Object]

Key Parameters of MEMS ® Acceleration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ADI Low g iMEMS Accelerometer Portfolio Product # of Axes Range Sensitivity Sensitivity Accuracy (%) Output Type Typical Bandwidth (kHz) Noise Density (µg/rtHz) Voltage Supply (V) ADXL325 3 +/- 5g 174 mV/g ±10 Analog 1.6 250 1.8 to 3.6 ADXL326 3 +/- 16g 57 mV/g ±10 Analog 1.6 250 1.8 to 3.6 ADXL327 3 +/- 2g 420 mV/g ±10 Analog 1.6 250 1.8 to 3.6 ADXL335 3 +/- 3g 300 mV/g ±10 Analog 1.6 300 1.8 to 3.6 ADXL345 3 +/- 2/4/8/16g up to 256 LSB/g ±10 Digital 1.6 - 2.0 to 3.6 ADXL346 3 +/- 2/4/8/16g up to 256 LSB/g ±10 Digital 1.6 - 1.7 to 2.75 ADXL321 2 +/- 18g 57 mV/g ±10 Analog 2.5 320 2.4 to 6 ADXL103 1 +/- 1.7g 1000 mV/g ±4 Analog 2.5 110 3 to 6 ADXL203 2 +/- 1.7g 1000 mV/g ±4 Analog 2.5 110 3 to 6 ADXL213 2 +/- 1.2g 30 %/g ±10 PWM 2.5 160 3 to 6

ADXL345 Digital Accelerometer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Output Type Bandwidth Range Sensitivity Sensitivity Accuracy (%) # of Axes Digital 1.6KHz ±2/ 4 / 8 / 16g Up to 256LSB/g ±10n/a 3

Motion Sensing Alarm with ADXL345 ,[object Object],[object Object],ADXL345 generates inactivity interrupt Store inactivity state in controller Wait for activity interrupt ADXL345 generates activity interrupt Request user passcode to continue operation

Fall Detection ,[object Object],[object Object],[object Object],FREE_FALL interrupt asserted Wait for ACTIVITY interrupt Wait for INACTIVITY interrupt Generate fall alert Wait for ACTIVITY interrupt Wait for INACTIVITY interrupt Generate critical fall alert

Tap Detection ,[object Object],[object Object],[object Object],[object Object],[object Object],ADXL345 generates first tap interrupt Wait for second tap interrupt Start different operations

Connecting with Processors ,[object Object],Figure 2 4-wire SPI connection Figure 3 I 2 C connection

Development Tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Additional Resource ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Newark Farnell

Low g iMEMS® Accelerometers

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