Summary of ADI moves MEMS gyro sensor to tactical grade
The ADIS16488 is a tactical-grade, 10-degree-of-freedom MEMS IMU integrating a triaxis gyroscope, accelerometer, magnetometer, and pressure sensor. It features factory calibration for sensitivity, bias, and alignment, ensuring high accuracy with minimal integration time. The device offers low power consumption, fast startup, and an SPI interface, making it a cost-effective upgrade for industrial, military, and medical navigation systems.
Parts used in the ADIS16488 iSensor MEMS IMU:
- Triaxial digital gyroscope
- Triaxial digital accelerometer
- Triaxial digital magnetometer
- Digital pressure sensor
- SPI-compatible serial interface
- Blackfin processor
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
For more read: ADI moves MEMS gyro sensor to tactical grade
- What components are integrated into the ADIS16488?
The device integrates a triaxis gyroscope, triaxis accelerometer, triaxis magnetometer, and pressure sensor. - How does the ADIS16488 compare in cost and power to legacy IMUs?
It consumes one-quarter the power and costs one-tenth as much as legacy high-end IMUs. - Does the ADIS16488 require user calibration before use?
No, all necessary motion testing and calibration are performed at the factory. - Can the ADIS16488 be used as a direct upgrade for the ADIS16375?
Yes, it uses the same footprint and connector system as the ADIS16375. - How long does it take for the ADIS16488 to start up?
The device has a fast start-up time of approximately 500 milliseconds. - What type of interface does the ADIS16488 use for data collection?
It uses an SPI-compatible serial interface for simple data collection and configuration control. - What is the dynamic range of the triaxial gyroscope?
The triaxial digital gyroscope has a dynamic range of ±450°/sec. - Is the operation of the ADIS16488 autonomous?
Yes, operation is fully autonomous including all embedded compensations.
