AXO315T | TDK‑Tronics | High-temperature closed-loop single-axis MEMS accelerometer

Brand: TDK-Tronics (a division of TDK), high-temperature closed-loop single-axis MEMS accelerometer, specifically developed for extreme high-temperature and high-vibration environments during oil and gas well drilling with MWD, serving as a replacement for quartz accelerometers.

What is it

Closed-loop architecture single-axis accelerometer, ceramic hermetically sealed packaging, 24-bit SPI digital output; divided into two sub-models:

AXO315T0：‑30℃ ~ +150℃

AXO315T1: -30℃ ~ +175℃ (Maximum temperature resistance 175℃)

Differences from ordinary AXO315: The ordinary AXO315 has a maximum temperature of +105℃; the AXO315T series enhances high-temperature reliability and has been verified to operate continuously under high temperature conditions underground for over 1000 hours.

Core parameters

Measuring range: ±14g

Architecture: Closed-loop MEMS, with anti-vibration rectification error of 20 µg/g² (approximately 10 times better vibration resistance compared to open-loop MEMS)

 Noise density: T0: 10 µg/√Hz; T1: 20 µg/√Hz at high temperature (Tronics)

Full temperature residual offset error: T0 ≤ 0.8 mg; T1 ≤ 1.7 mg

Bandwidth: 150 Hz; Data output rate up to 2500 Hz; Delay 2 msTronics

Non-linearity: 80 ppm

- Power supply: 5V (4.75‑5.25V), IO also 5V

- Interface: 24-bit SPI digital output, built-in power-on + continuous BIST self-diagnosis

- Package: 28-pin J-LEAD hermetic ceramic SMD; dimensions 12.45×12.45×5.5 mm TDK Produ

- Vibration resistance: 20 g RMS random vibration; Impact resistance: 2000 g (survival)

- Lifespan: T0@165℃, T1@175℃ can operate continuously for >1000 hours

- Compliance: RoHS, REACH, not subject to dual-use item export control

Main functions

1. Measure acceleration and gravity components with high precision using a single axis, and calculate the inclination angle

2. Closed-loop architecture, which suppresses vibration rectification errors in strong vibration environments during drilling, ensuring no drift in inclination data

3. 24bit SPI digital output, eliminating the need for an external ADC and simplifying the downhole circuit

4. Built-in continuous hardware self-diagnosis, reporting sensor faults in real time

5. Full temperature calibration at the factory reduces the workload of customer compensation for complete machines

Scope of Application

1. Measurement While Drilling (MWD) (main scenario): directional drilling downhole probe, high-temperature inclination and deviation measurement in the well, replacing expensive quartz accelerometers

2. Geological exploration, downhole tools, and deep drilling equipment

3. High-temperature industrial inertial measurement unit (IMU): multiple AXO315T units combined to form a multi-axis inertial measurement unit

4. Geothermal equipment, deep well monitoring instruments

5. High-temperature attitude measurement for aerospace and special military applications (tactical-level inertial)

> Model differentiation

- AXO315: -55~+105℃, general tactical-grade inertial navigation system, not suitable for high temperature underground

- AXO315T0: -30 to +150℃, standard model for underground use - AXO315T1: -30 to +175℃, for ultra-high temperature underground conditions

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GYPRO4300

GYPRO5050

AXO315T:14g-175C

AX0315:14g-105C

AX0314:14g-85C°

AX0305:05g-85C°

AX0301:01g-85c

AXO315T0

AXO315T1

For technical and business inquiries, please contact Mr. Zhang at 13430464310