TDK expands MEMS accelerometer platform

TDK Corp. has extended its Tronics AXO 300 digital MEMS accelerometer platform with the introduction of two news devices – the high-resolution ±1 g AXO301 and the ±5 g AXO305. The AXO301 device targets motion control of construction machinery, high precision acceleration/deceleration measurements in railway applications and inclination control in industrial applications. The AXO305 accelerometer is designed for use in navigation, positioning, platform, antenna, crane stabilization and motion control of land and marine manned and unmanned systems.

(Source: TDK Corp.)

The AXO301 single-axis in-plane accelerometer features a resolution of 50 μg, a one-year composite bias repeatability of 1 mg, a one-year composite scale factor repeatability of 600 ppm, 15-Hz bandwidth and vibration rectification error of 20 μg/g². It is compliant with EN61373 railway standard for vibration and shock.

The low-noise, closed-loop digital MEMS accelerometer is a low SWaP (size, weight and power) and cost-effective alternative to force balance inclinometers and servo accelerometers, said TDK, and offers ultra-low noise density and high-accuracy inclination angle measurements.

The AXO305 single-axis in-plane accelerometer features a one-year composite bias repeatability of 1 mg and a composite scale factor repeatability of 600 ppm. Other key specs include a noise density of 8 µg/√Hz, a latency of 2 ms and a vibration rejection of 20 μg/g². The device’s bias instability of 4 μg with a ±0.5 mg bias over its temperature range enables precise GNSS-aided navigation of manned and unmanned ground vehicles and trains when integrated into an inertial navigation system (INS).

All Tronics AXO300 series devices are housed in a miniature, hermetic, ceramic J-lead package for long operational and storage life and guarantee a high compliancy with the stringent thermal cycling requirements of critical applications. They embed fully hard-coded electronics with a 24-bit digital SPI interface for fast integration into standalone sensor modules, INS, IMU and attitude and heading reference systems (AHRS).

The AXO301 and AXO305 accelerometers are available for sampling and customer evaluations. An Arduino-based evaluation kit provides built-in testing functions such as output reading and recording, recalibration and digital self-tests.