MPU-9250 IMU Breakout [Generic] - (AD36228)

Description:

The MPU-9250 IMU expansion module incorporates InvenSense’s latest 9-axis MEMS sensor. Each 9-degree-of-freedom expansion module incorporates an MPU-9250 with a system-in-package (SiP) that combines two chips: the MPU-6500, which contains a 3-axis gyroscope and accelerometer, and the AK8963, which includes a 3-axis magnetometer. This expansion module has been designed to be smaller than other products to fit smaller projects. However, if you plan to use a breadboard or attach the IMU board to a project with something like epoxy, the mounting holes can be easily removed.

To achieve its smaller size, the MPU-9250 expansion module incorporates PTH pins surrounding the edge of the PCB in three rows of three or four. The top row (J1) is sufficient for maximum IMU functionality. These include the I₂C and power interfaces. The second, more commonly used set of PTH pins is located on the bottom (J3). These include the address pin, interrupt pin, and I/O power supply for easy interfacing with a more modern 1.8V processor. The third row (J2), not breadboard-friendly, is used for functions such as running other I₂C devices as slaves to this one. To prototype with these connections, place them across the top as you would an Arduino Pro Mini or similar product.

The MPU-9250 replaces the popular EOL MPU-9150 and reduces power consumption by 44%. According to InvenSense, “Gyro noise performance is three times better and full compass range is more than four times better than competitive offerings.” The MPU-9250 uses 16-bit analog-to-digital converters (ADCs) to digitize all nine axes, making it a very stable 9-degree-of-freedom board.

Characteristics:

• Angular rate sensors (gyroscopes) with digital output on the X, Y and Z axes, with a programmable full scale range of ±250, ±500, ±1000 and ±2000°/s and integrated 16-bit analog-to-digital converters (ADC).
• Three-axis accelerometer with digital output, with a programmable full scale range of ±2 g, ±4 g, ±8 g and ±16 g, and integrated 16-bit analog-to-digital converters (ADCs).
• 3-axis monolithic silicon magnetic sensor with Hall effect and magnetic concentrator.
• Digitally programmable low-pass gyroscope filter.
• Gyroscope operating current: 3.2 mA.
• Normal operating current of the accelerometer: 450 µA.
• Normal operating current of the magnetometer: 280 µA at a repetition rate of 8 Hz.
• VDD supply voltage range: 2.4 – 3.6 V
• Small board design
• Removable mounting holes

Reference documents:

• Schematic
• Eagle Files
• Hookup Guide
• Datasheet (MPU-9250)
• Register Map (MPU-9250)
• Arduino Library
• GitHub