The MPU-6500 is a 6-axis MotionTracking device that combines a 3-axis gyroscope, 3-axis accelerometer, and a Digital Motion Processor™ (DMP) all in a small 3x3x0.9mm package. It also features a 512-byte FIFO that can lower the traffic on the serial bus interface, and reduce power consumption by allowing the system processor to burst read sensor data and then go into a low-power mode. With its dedicated I2 C sensor bus, the MPU-6500 directly accepts inputs from external I2 C devices. MPU-6500, with its 6-axis integration, onchip DMP, and run-time calibration firmware, enables manufacturers to eliminate the costly and complex selection, qualification, and system level integration of discrete devices, guaranteeing optimal motion performance for consumers. MPU-6500 is also designed to interface with multiple non-inertial digital sensors, such as pressure sensors, on its auxiliary I2 C port.
The gyroscope has a programmable full-scale range of ±250, ±500, ±1000, and ±2000 degrees/sec and very low rate noise at 0.01 dps/√Hz. The accelerometer has a user-programmable accelerometer full-scale range of ±2g, ±4g, ±8g, and ±16g. Factory-calibrated initial sensitivity of both sensors reduces production-line calibration requirements. Other industry-leading features include on-chip 16-bit ADCs, programmable digital filters, a precision clock with 1% drift from -40°C to 85°C, an embedded temperature sensor, and programmable interrupts. The device features I2C and SPI serial interfaces, a VDD operating range of 1.71 to 3.6V, and a separate digital IO supply, VDDIO from 1.71V to 3.6V.
Communication with all registers of the device is performed using either I2C at 400kHz or SPI at 1MHz. For applications requiring faster communications, the sensor and interrupt registers may be read using SPI at 20MHz.
By leveraging its patented and volume-proven CMOS-MEMS fabrication platform, which integrates MEMS wafers with companion CMOS electronics through wafer-level bonding, InvenSense has driven the package size down to a footprint and thickness of 3x3x0.90mm (24-pin QFN), to provide a very small yet high performance low cost package. The device provides high robustness by supporting 10,000g shock reliability.
Gyroscope Features The triple-axis MEMS gyroscope in the MPU-6500 includes a wide range of features:
Digital-output X-, Y-, and Z-axis angular rate sensors (gyroscopes) with a user-programmable fullscale range of ±250, ±500, ±1000, and ±2000°/sec and integrated 16-bit ADCs
Digitally-programmable low-pass filter
Gyroscope operating current: 3.2mA
Factory calibrated sensitivity scale factor
Accelerometer Features The triple-axis MEMS accelerometer in MPU-6500 includes a wide range of features:
Digital-output X-, Y-, and Z-axis accelerometer with a programmable full scale range of ±2g, ±4g, ±8g and ±16g and integrated 16-bit ADCs
Accelerometer normal operating current: 450µA
Low power accelerometer mode current: 6.37µA at 0.98Hz, 17.75µA at 31.25Hz
Wake-on-motion interrupt for low power operation of applications processor
Additional Features The MPU-6500 includes the following additional features:
Auxiliary master I2 C bus for reading data from external sensors (e.g. magnetometer)
3.4mA operating current when all 6 motion sensing axes are active
VDD supply voltage range of 1.8 – 3.3V ± 5%
VDDIO reference voltage of 1.8 – 3.3V ± 5% for auxiliary I2C devices
Smallest and thinnest QFN package for portable devices: 3x3x0.9mm
Minimal cross-axis sensitivity between the accelerometer and gyroscope axes
512 byte FIFO buffer enables the applications processor to read the data in bursts
Digital-output temperature sensor
User-programmable digital filters for gyroscope, accelerometer, and temp sensor
10,000 g shock tolerant
400kHz Fast Mode I2C for communicating with all registers
1MHz SPI serial interface for communicating with all registers
20MHz SPI serial interface for reading sensor and interrupt registers
MEMS structure hermetically sealed and bonded at wafer level
Internal Digital Motion Processing (DMP) engine supports advanced MotionProcessing and low power functions such as gesture recognition using programmable interrupts
In addition to the angular rate, this device optionally outputs the angular position (angle).
Low-power pedometer functionality allows the host processor to sleep while the DMP maintains the step count.