ADI moves MEMS gyro sensor to tactical grade
The ADIS16488 iSensor® MEMS IMU is a complete inertial system that includes a triaxis gyroscope, a triaxis accelerometer, triaxis magnetometer and pressure sensor. Each inertial sensor in the ADIS16488 combines industry-leading iMEMS® technology with signal conditioning that optimizes dynamic performance. The factory calibration characterizes each sensor for sensitivity, bias, alignment, and linear acceleration (gyroscope bias). As a result, each sensor has its own dynamic compensation formulas that provide accurate sensor measurements.
The ADIS16488 provides a simple, cost-effective method for integrating accurate, multiaxis 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 ADIS16488 uses the same footprint and connector system as the ADIS16375, which greatly simplifies the upgrade process. It comes in a module that is approximately 47 mm × 44 mm × 14 mm and has a standard connector interface.
- Triaxial, digital gyroscope with digital range scaling
– ±450°/sec dynamic range
– <0.05° orthogonal alignment
– ~6°/hr in-run bias stability
– 0.3°/√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 ms
- Factory-calibrated sensitivity, bias, and axial alignment
– Calibration temperature range: −40°C to +70°C
- SPI-compatible serial interface
- See datasheet for additional features
Analog Devices has introduced a new MEMS IMU (inertial measurement unit) in its iSensor range and the signficance is this is a tactical grade 10-degree-of-freedom (DoF) sensor.
“For industrial, military, and medical equipment designers who require the most accurate detection and control of motion in order to stabilize or navigate their applications, the ADIS16488 tactical grade IMU offers performance levels previously only available to those with unlimited budgets,” said Bob Scannell, iSensor business development manager, MEMS/Sensors technology group at Analog Devices.
The ADIS16488 integrates a tri-axis gyroscope, tri-axis accelerometer, tri-axis magnetometer and a pressure sensor into a single package.
“With equal or better performance to legacy high-end IMUs on key measures such as bias stability and angular random walk, the ADIS16488 provides better performance on the often more critical parameters of vibration-rectification, linearity, and bandwidth while consuming one-quarter the power, and at one-tenth the cost,” said Scannell.
The ADIS16488 iSensor 10-DoF MEMS IMU is a complete inertial measurement system that combines ADI’s high performance iMEMS® technology and sensor-signal processing expertise to optimize the IMU’s 10-DoF dynamic performance.
Operation is fully autonomous, including all embedded compensations, with valid data available from the SPI interface 500ms after applying power.
Calibration is carried out at the factory, and there is a Blackfin processor for configuring the interface for tuning embedded filtering and other diagnostics
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