AXO305, High‑precision Digital Single‑Axis Closed‑Loop MEMS Accelerometer from Tronics, a TDK Group company

AXO305, a high‑precision digital single‑axis closed‑loop MEMS accelerometer from Tronics, a TDK Group company. Closed‑loop architecture featuring low zero‑point drift and high vibration resistance, designed as a replacement for traditional quartz accelerometers. Hermetic ceramic SMD package, industrial‑navigation grade, non‑automotive‑qualified device.

Key Parameters

Measurement Range: ±5 g, saturation at approx. 7 g

Digital Resolution: 1 µg/LSB, 24‑bit SPI digital output

Noise Density: 10 μg/√Hz

1‑year Composite Bias Repeatability: 1 mg (key specification)

Vibration Rectification Error (VRE): 20 μg/g² (vibration‑resistance performance)

Bandwidth: 120 Hz (customizable)

Data Output Rate: up to 2500 Hz; latency 2 ms

Bias Instability (Allan Variance): 3 μg

Power Supply: 5 V (both VDD and I/O at 5 V)

Temperature Range: ‑40 ℃ ~ +85 ℃

Shock: Operating shock 50 g@6 ms; survival shock 2000 g@0.3 ms

Package: Hermetic ceramic SMD, 12.45×12.45 mm, weight 1.4 g

Main Features

Closed‑loop MEMS architecture: Excellent linearity and superior vibration immunity. Suppresses zero‑point drift induced by vibration; accuracy will not degrade rapidly under heavy‑vibration operating conditions.

Factory full‑temperature‑range calibration: Temperature compensation completed at factory. Complex temperature modelling is not required on customer side, reducing system‑development workload.

24‑bit SPI digital interface: Direct output of digital acceleration values; no external ADC required, easy integration into IMU/INS systems.

Built‑In Self‑Test (BIST): Power‑on self‑test plus continuous run‑time self‑test to verify sensor health and facilitate equipment fault diagnosis.

Hermetic ceramic package: Moisture‑proof and resistant to environmental stress, suitable for long‑term deployment in harsh field and marine environments.

Peer‑series reference: AXO301 (±1 g), AXO315 (±14 g, high‑temperature version optional)

Applications

Marine & Vessel

‑ MRU (Motion Reference Unit): Vessel dynamic positioning and attitude monitoring; stabilization systems for offshore platforms, cranes and antennas

‑ AUV (Autonomous Underwater Vehicle), ROV (Remotely Operated Vehicle), underwater inertial navigation INS/IMU

Land Transportation

‑ GNSS‑aided inertial navigation INS/IMU for unmanned vehicles and special‑vehicle positioning

‑ Positioning and navigation systems for railway rolling stock

Industrial Equipment

‑ Attitude measurement for precision robots and mobile equipment

‑ Attitude stabilization control for large‑scale platforms, antennas and construction machinery

Note: Not suitable for high‑temperature oil‑gas MWD (Measurement‑While‑Drilling) conditions. Select AXO315T1 (‑30 ℃ ~ +175 ℃) for high‑temperature drilling applications.

Sales Tips

This is a single‑axis device; multiple units are required to build an IMU. Frequently paired with Tronics GYPRO4000‑series high‑precision MEMS gyroscopes to form a complete inertial system.

Not AEC‑Q100 automotive‑qualified; shall not be used for automotive‑grade projects.

GYPRO4300

GYPRO5050

AXO315T:14g-175C

AX0315:14g-105C

AX0314:14g-85C°

AX0305:05g-85C°

AX0301:01g-85c

AXO315T0

AXO315T1