3-axis accelerometer AKM390

MEMScapacitivewith temperature measurement

Product description
The AKM390 is a three-axis MEMS accelerometer with analog voltage output designed for industrial vibration and impact measurement. It integrates a single‑crystal silicon capacitive sensor, a low‑power ASIC for signal conditioning, a microcontroller for compensation storage and a temperature sensor. The device is calibrated, sealed to IP67 and built with aerospace‑grade aluminium.

Quick specifications

• Axes: Three axes (X, Y, Z)
• Output voltage: 0 ~ 5 V (0 g centered at 2.5 V)
• Supply voltage: 9 ~ 36 VDC
• Shock resistance (summary): 2000 g
• Operating temperature: -40℃ ~ +85℃
• Storage temperature: -40℃ ~ +85℃
• Protection rating: IP67

Applications

• Crash recording, fatigue monitoring and prediction
• Wind power turbine monitoring
• Transport infrastructure monitoring, subgrade analysis, high‑speed rail fault detection
• Large machinery and engine vibration monitoring
• Low‑frequency vibration and automated monitoring systems
• Medical equipment vibration measurement
• Bridge structural monitoring
• Automotive test and monitoring
• Roller and rotating machinery monitoring

Dimensions (size)

• Housing: L36 × W32 × H24 mm
• Mounting footprint: L29 × W25 × H4 mm
• Mounting screws: 4 × M4

Parameters

• Model: AKM390
• Measurement ranges: ±2 / ±4 / ±8 / ±10 / ±20 / ±40 g
• Bias calibration: <1 mg (all ranges)
• Axes measured: X, Y, Z
• Power on/off repeatability: <2 mg (max)
• Sensitivity (±10%): 1250 / 625 / 312.5 / 250 / 125 / 62.5 mV/g
• Temperature coefficient of bias: 0.01 / 0.01 / 0.01 / 0.05 / 0.05 / 0.05 %/℃
• Resolution/Threshold (@1 Hz): <1 mg (max)
• Nonlinearity (max): <0.5 / <0.5 / <0.8 / <1 / <1 / <1 % FS
• Frequency response: 500 Hz
• Bandwidth (3 dB): 1000 Hz
• Cross‑axis sensitivity: 1 / 1 / 1 / 2 / 2 / 2 %
• Lateral vibration sensitivity ratio: 1 / 1 / 2 / 5 / 5 / 5 %
• Resonant frequency: 2.4 / 2.4 / 2.4 / 5.5 / 5.5 / 5.5 kHz
• Noise density: 21 / 21 / 21 / 86.6 / 86.6 / 86.6 μg/√Hz
• 0 g output offset (typ): <0.01 / <0.01 / <0.01 / <0.008 / <0.008 / <0.008 mV
• Impact resistance (single): 100 g @ 11 ms (triaxial, half‑sine)
• Recovery time: <1 ms (1000 g, 1/2 sin 1 ms, impact on i‑axis)
• Vibration durability: 20 g RMS, 20–2000 Hz (random), 30 min per axis
• Input (VDD–VSS): 9–36 VDC
• Operating current: <60 mA @ 12 VDC
• Reliability: MIL‑HDBK‑217 Class II
• Protection: IP67
• Material: Aerospace aluminium
• Weight: Sensor ≤116 g; magnetic base ≤50 g

Technical specifications

• Model: AKM390
• Type: Three‑axis MEMS accelerometer, analog voltage output
• Output: 0 ~ 5 V (0 g at 2.5 V)
• Supply: 9–36 VDC
• Current consumption: <60 mA @ 12 VDC
• Selectable ranges: ±2 to ±40 g
• Protection: IP67
• Operating temperature: -40℃ to +85℃
• Material: Aerospace aluminium
• Dimensions: L36 × W32 × H24 mm
• Weight: ≤116 g