InvenSense MPU-9250 9-Axis (Gyroscope + Accelerometer + Compass) Sensor IC

Overview

The MPU-9250 is the company’s second generation 9-axis MotionTracking device for smartphones, tablets, wearable sensors, and other consumer markets. The MPU-9250, delivered in a 3x3x1mm QFN package, is the world’s smallest 9-axis MotionTracking device and incorporates the latest InvenSense design innovations, enabling dramatically reduced chip size and power consumption, while at the same time improving performance and cost. The MPU-9250 MotionTracking device sets a new benchmark for 9-axis performance with power consumption only 9.3µA and a size that is 44% smaller than the company’s first-generation device. Gyro noise performance is 3x better, and compass full scale range is over 4x better than competitive offerings.

The MPU-9250 is a System in Package (SiP) that combines two chips: the MPU-6500, which contains a 3-axis gyroscope, a 3-axis accelerometer, and an onboard Digital Motion Processor™ (DMP™) capable of processing complex MotionFusion algorithms; and the AK8963, the market leading 3-axis digital compass. The MPU-9250 supports InvenSense’s market proven MotionFusion. A single design can support the MPU-9250 or MPU-6500, providing customers the flexibility to support either device in different product SKUs.

Improvements include supporting the accelerometer low power mode with as little as 6.4µA of and it provides improved compass data resolution of 16-bits (0.15 µT per LSB). The full scale measurement range of ±4800µT helps alleviate compass placement challenges on complex pcb’s.

The MPU-9250 software drivers are fully compliant with Google’s Android 4.1 Jelly Bean release, and support new low-power DMP capabilities that offload the host processor to reduce power consumption and simplify application development. The MPU-9250 includes MotionFusion and run-time calibration firmware that enables consumer electronics manufacturers to commercialize cost effective motion-based functionality.

MPU-9250 System Diagram

Features

• Digital-output 6-axis MotionFusion data from DMP. 9-axis fused data from Motion Processing Library
• Tri-Axis angular rate sensor (gyro) with full-scale range of ±250, ±500, ±1000, and ±2000dps
• Tri-Axis accelerometer with a programmable full scale range of ±2g, ±4g, ±8g and ±16g
• Tri-axis compass with a full scale range of ±4800µT
• Reduced settling effects and sensor drift by elimination of board-level cross-axis alignment errors between accelerometer, gyroscope, and compass
• Digital Motion Processing™ (DMP™) engine offloads complex MotionFusion, sensor timing synchronization and gesture detection
• MotionApps™ Platform support for Android, Windows 8 and embedded applications
• Embedded algorithms for run-time bias and compass calibration. No user intervention required
• Digital-output temperature sensor
• Digital input on FSYNC pin to support video Electronic Image Stabilization and GPS
• Programmable interrupt supports gesture recognition, panning, zooming, scrolling, tap detection, and shake detection
• VDD Supply voltage range of 2.4V–3.46V; VDDIO of 1.7V to VDD
• Gyro operating current: 3.2mA (full power, gyro 1 kHz ODR)
• Gyro + Accel operating current: 3.4mA (full power, gyro at 1 kHz ODR, accel at 4kHz ODR)
• Accel low power mode operating current: 6.4µA at 0.98Hz
• 400kHz Fast Mode I²C or up to 1MHz SPI serial host interfaces
• 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 (3x3x1mm)
• RoHS and Green compliant

Applications

• BlurFree™ technology (for Video/Still Image Stabilization)
• AirSign™ technology (for Security/Authentication)
• TouchAnywhere™ technology (for “no touch” UI Application Control/Navigation)
• MotionCommand™ technology (for Gesture Short-cuts)
• Motion-enabled game and application framework
• InstantGesture™ iG™ gesture recognition
• Location based services, points of interest, and dead reckoning
• Handset and portable gaming
• Motion-based game controllers
• 3D remote controls for Internet connected DTVs and set top boxes, 3D mice
• Wearable sensors for health, fitness and sports
• Toys
• Pedestrian based navigation
• Navigation
• Electronic Compass

Documentations

• MPU-9250 Product Specification v1.0
• MPU-9250 Register Map v1.4
• MPU-9250 Evaluation Board User Guide v1.1