Ten-degrees-of-freedom, tactical-grade inertial MEMs sensor

February 03, 2014 // By Graham Prophet
Analog Devices has posted information on a sensor that you can use to embed inertial sensing into demanding industrial or other systems; as a tactical-grade part it costs around $1600 in small volumes but comes completely factory motion tested and pre-calibrated. Use it in platform stabilisation and control, navigation, personnel tracking, instrumentation and robotics.

The ADIS16488A iSensor device is a complete inertial system that includes a triaxis gyroscope, a triaxis accelerometer, triaxis magnetometer, and pressure sensor. Each inertial sensor in the ADIS16488A combines Analog’s iMEMS technology with signal conditioning that optimises dynamic performance. The factory calibration characterises each sensor for sensitivity, bias, alignment, and linear acceleration (gyroscope bias). As a result, each sensor has its own dynamic compensation formulae that provide accurate sensor measurements.

The ADIS16488A, ADI says, provides a simple, cost-effective method for integrating accurate, multi-axis inertial sensing into industrial systems, especially when compared with the complexity and investment associated with discrete designs. All necessary motion testing and calibration are part of the production process at the factory, greatly reducing system integration time. Tight orthogonal alignment simplifies inertial frame alignment in navigation systems. The SPI and register structure provide a simple interface for data collection and configuration control.

The ADIS16488A uses the same footprint and connector system as the ADIS16375, ADIS16480, ADIS16485, and ADIS16488, which simplifies the upgrade process. The ADIS16488A is packaged in a module that is approximately 47 × 44 × 14 mm and includes a standard connector interface.

Features are;

Triaxial, digital gyroscope, ±450°/sec dynamic range

±0.05° orthogonal alignment error

5.1°/hr in-run bias stability

0.26°/√hr angular random walk

0.01% nonlinearity

Triaxial, digital accelerometer, ±18 g

Triaxial, delta angle and delta velocity outputs

Triaxial, digital magnetometer, ±2.5 gauss

Digital pressure sensor, 300 mbar to 1100 mbar

Fast start-up time, ~500 msec

Factory-calibrated sensitivity, bias, and axial alignment

Calibration temperature range: −40°C to +85°C

SPI-compatible serial interface

Analog Devices; www.analog.com/en/mems-sensors/mems-inertial-measurement-units/adis16488a/products/product.html