Triple Axis (X/Y/Z) MEMS Gyroscopes

Overview

InvenSense triple-axis gyroscopes are the world’s first single-chip, digital-output, 3-axis MEMS devices optimized for consumer applications. All devices feature three 16-bit analog-to-digital converters (ADCs) for digitizing the gyro outputs, a full-scale range up to ±2000 degrees per second (dps), programmable low-pass filters, I2C or SPI serial interfaces, low-voltage operation (from 2.1V to 3.6V), and small 4x4x0.9mm QFN packages. The devices in this family include the ITG-3200, IMU-3000, and MPU-3000.

All devices provide filtered, gyroscope data to their serial communications bus. The ITG-3200 supports raw 3-axis gyroscope data output only. The IMU and MPU devices feature an embedded Digital Motion Processor™ (DMP™) hardware accelerator engine, a 512 byte FIFO, and a secondary I2C-master sensor bus that interfaces to third party digital accelerometers to deliver a complete 6-axis sensor fusion output of processed acceleration and rotational motion data. The on-chip FIFO and sensor bus simplify system timing and lower system power consumption. The dedicated sensor bus allows the device to directly acquire data from the off-chip accelerometer without intervention from an external processor, while the FIFO allows the system microcontroller to burst read the sensor data and then enter sleep mode as the MPU or IMU collects more data.

Since handsets today are of multi-function nature, the triple-axis MPU-3000, provides accurate 1:1 motion tracking for common applications such as gaming, still/video image stabilization, and location based services. Additionally, the 32-bit DMP engine can be programmed to deliver advanced User Interface (UI) functionality such as gesture and character recognition which can enable applications such as AirSign™ signature authentication, TouchAnywhere™ application and navigation control, and MotionCommand™ gesture shortcuts.

Designed for portable consumer devices such as game controllers and remote controls for Internet-connected TVs, the IMU-3000 with its DMP reduces system costs. By combining motion sensors and the DMP, the system processing requirements of motion-based handheld devices can typically be met by pairing the IMU-3000’s DMP with the processor built into the system’s RF chip. This provides a cost-reduced solution that is readily portable to many different platforms.

To assist in the rapid development and deployment of products using the MPU-3000 and IMU-3000, InvenSense provides a Motion Processing Library (MPL) that contains the core algorithm engines for motion processing, and includes an API layer which provides a simple interface into these engines. In addition, sample motion applications such as gesture recognition and image stabilization help speed time to market for consumer devices adding motion functionality. Evaluation boards and reference design kits are available for all the triple-axis devices.

Click here for 3-Axis Motion Processing Solution Comparison Matrix.

Applications

• Handsets and Tablets
  • Gaming
  • Location based services, points of interest, and dead reckoning
  • Improved camera image quality through image stabilization
  • Health and sports monitoring
  • “No Touch” user interface
• 3D remote controls for Internet connected DTVs and set top boxes
• Motion-based game controllers and 3D mice
• Motion-based portable gaming
• Health, fitness and sports
• Toys
• Consumer appliances

Features

• Integrated triple axis, digital-output X-, Y-, and Z-Axis angular rate sensors (gyroscopes)
• User-programmable full-scale range of ±250°/sec, ±500°/sec, ±1000°/sec, or ±2000°/sec (on IMU and MPU only)
• Three integrated 16-bit ADCs provide wide dynamic range for superior motion capture of both low-speed and high-speed motions
• Enhanced bias and sensitivity temperature stability reduces need for user calibration
• Industry-leading low-frequency noise simplifies application development and enables more-responsive applications
• Programmable low-pass filters
• Embedded Digital Motion Processing™ (DMP™) engine supports 3D motion processing. When used with a digital 3-axis third party accelerometer, the IMU and MPU devices collect the accelerometer data via a dedicated interface, while synchronizing data sampling at a user defined rate. The total data set obtained by the IMU-3000 includes 3-axis gyroscope data, 3-axis accelerometer data, and temperature data.
• 512-Byte FIFO buffers complete data set, reducing timing requirements on the system processor and saving power by enabling the processor to burst read the FIFO data, and then enter into a low-power sleep mode while the IMU collects more data.
• VDD analog supply voltage range of 2.1V to 3.6V
• Flexible VLOGIC reference voltage allows for I2C interface voltages from 1.71V to VDD
• Power consumption with all three axes active: 5.9mA
• Sleep mode: 5µA
• Each axis can be individually powered-down
• 4x4x0.9mm QFN plastic package
• MEMS structure hermetically sealed and bonded at wafer level
• RoHS and Green compliant