Triple Axis (X/Y/Z) MEMS Gyroscopes

Overview

InvenSense three-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-3050 and MPU-3050.

All devices provide filtered gyroscope data to their serial communications bus. The ITG-3050 supports raw 3-axis gyroscope data output only. The ITG-3050 features a secondary I²C master sensor bus, providing a direct upgrade path to the MPU family of products, which allow integration with InvenSense’s software solutions. The MPU devices feature an embedded Digital Motion Processor™ (DMP™) hardware accelerator engine, a minimum of 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 collects more data.

Since handsets today are of multi-function nature, the three-axis MPU-3050 provides accurate 1:1 motion tracking for common applications such as gaming and location based services. Additionally, the 32-bit DMP engine delivers 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 MPU-3050 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 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 product families, InvenSense provides a MotionApps™ Platform 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 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.

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 (DirectPoint™)
• Motion-based game controllers and 3D mice
• Motion-based portable gaming
• Health, fitness and sports
• Toys
• Consumer appliances

Features

• Tri-Axis angular rate sensor (gyro) with a sensitivity up to 131 LSBs/dps and a full-scale range of ±250, ±500, ±1000, and ±2000dps
• Digital Motion Processing™ (DMP™) engine offloads complex MotionFusion, sensor timing synchronization and gesture detection. When used with a digital 3-axis third party accelerometer, the MPU device collects the accelerometer data via a dedicated interface, while synchronizing data sampling at a user defined rate. The total data set obtained by the MPU-3050 includes 3-axis gyroscope data, 3-axis accelerometer data, and temperature data.
• MotionApps™ Platform support for Android, Linux, and Windows, with Windows Phone platforms on the roadmap
• Embedded algorithms for run-time bias and compass calibration. No user intervention required
• Digital-output temperature sensor
• Three integrated 16-bit ADCs provide wide dynamic range for superior motion capture of both low-speed and high-speed motions
• Industry-leading low-frequency noise simplifies application development and enables more-responsive applications
• 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 MPU collects more data.
• Programmable interrupt supports gesture recognition, panning, zooming, scrolling.
• 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
• Gyro operating current: 5.9mA (full power, gyro at all rates)
• Full Chip Idle Mode Supply Current: 5µA
• Each axis can be individually powered-down
• 400kHz Fast Mode I²C serial host interface
• On-chip timing generator with ±1% frequency variation over full temperature range
• User self test
• 10,000g shock tolerant
• Smallest and thinnest package for portable devices (4x4x0.9mm QFN)
• MEMS structure hermetically sealed and bonded at wafer level
• RoHS and Green compliant