DFRobot Fermion SEN0695 Compact 9DOF IMU Sensor
DFRobot Fermion SEN0695 Compact 9DOF Inertial Measurement Unit (IMU) Sensor combines the Bosch BMI323 6-axis IMU and Bosch BMM350 3-axis magnetometer to provide accurate motion, orientation, and heading data in a compact 24mm × 19mm module. The sensor measures acceleration, angular velocity, and magnetic fields, making the device ideal for electronic compasses, mobile robots, wearable devices, and handheld motion-control systems. The sensor features a high-speed I2C interface, programmable interrupts, and support for Arduino, Raspberry Pi, and ESP32 development platforms.
Designed for low-power embedded applications, the DFRobot Fermion SEN0695 operates with 0.92mA typical current consumption and as little as 0.37mA in Low Power mode. The BMI323 delivers 16-bit accelerometer and gyroscope data at rates up to 6400Hz, while the BMM350 magnetometer supports output rates up to 400Hz with high magnetic sensitivity. Built-in hardware functions, including step counting, tap detection, tilt sensing, free-fall detection, and activity recognition, simplify motion-aware designs. A 2048-byte FIFO buffer helps maintain reliable data capture during high-speed operation, enabling efficient sensor fusion and real-time motion tracking.
Features
- Designed based on Bosch BMI323 6-axis IMU + BMM350 3-axis magnetometer for 9-axis sensing
- High-accuracy, high-stability output with built-in low-noise architecture and on-chip temperature compensation
- Built-in hardware motion algorithms, including step counting, tap detection, tilt sensing, free-fall, and activity recognition
- Integrated 2048-byte FIFO buffer ensures high-speed data transmission without loss
- Magnetometer employs 3rd-generation TMR technology with enhanced interference immunity and fast recovery
- Supports multiple operating modes, including Sleep, Low Power, Normal, and High Performance - Low Power mode consumes only 0.37mA
- Onboard I2C interface supports both soldered and plug-in connection methods for flexible integration
- Compatible with mainstream development boards, including Arduino, Raspberry Pi, and ESP32, with complete development libraries
Applications
- Electronic compass prototypes
- Mobile robot direction feedback
- Handheld orientation controllers
- Wearable heading and movement devices
Specifications
- 3.3V operating voltage
- 0.92mA operating current
- 0.37mA low-power current
- I2C communication interface
- I2C addresses
- 0x69 (default), 0x68 for BMI323
- 0x15 (default), 0x14 for BMM350
- BMI323
- ±2g, ±4g, ±8g, and ±16g accelerometer measurement ranges
- 16-bit accelerometer ADC resolution
- Accelerometer sensitivity
- 16384LSB/g in the ±2g range
- 8192LSB/g in the ±4g range
- 4096LSB/g in the ±8g range
- 2048LSB/g in the ±16g range
- ±0.5% accelerometer sensitivity error
- ±50mg accelerometer zero-g offset
- Accelerometer Output Data Rate (ODR)
- 12.5Hz to 6400Hz in High Performance/Normal mode
- 0.78125Hz to 400Hz in Low Power mode
- ±125°/s, ±250°/s, ±500°/s, ±1000°/s, and ±2000°/s gyroscope angular rate ranges
- 16-bit gyroscope ADC resolution
- Gyroscope sensitivity
- 16.384LSB/(°/s) in the ±2000°/s range
- 32.768LSB/(°/s) in the ±1000°/s range
- 65.536LSB/(°/s) in the ±500°/s range
- 131.072LSB/(°/s) in the ±250°/s range
- Gyroscope sensitivity error
- ±3% without self-calibration
- ±0.7% after self-calibration
- ±1°/s gyroscope zero-rate offset
- Gyroscope ODR
- 12.5Hz to 6400Hz in High Performance/Normal mode
- 0.78125Hz to 400Hz in Low Power mode
- BMM350
- Normal periodic measurement, triggered forced measurement, and low-power sleep standby operating modes
- ±2000µT measurement range
- Approx. 0.1µT magnetic field resolution
- ±2µT zero-field offset drift (-40°C to +85°C, after calibration)
- ±1% X-/Y-axis gain error (25°C, after API compensation)
- ±3% Z-axis gain error (25°C, after API compensation)
- ±0.010%/K sensitivity temperature drift
- ±200nT/K offset temperature error
- 400Hz, 200Hz, 100Hz, 50Hz, 25Hz, 12.5Hz, 6.25Hz, 3.125Hz, and 1.5625Hz normal mode output data rate, typical deviation ±2%
- 200Hz forced mode maximum trigger frequency (avg=0 only)
- 190nTRMS X-/Y-axis output noise
- 450nTRMS Z-axis output noise
- 3x programmable interrupt pins
- Connector types
- SH1.0-5P connector
- 2.54mm pin header holes
- Physical dimensions
- 24mm × 19mm PCB size
- 19mm mounting hole spacing
- ø2mm mounting hole diameter
Kit Contents
- 1x Fermion SEN0695 high-precision 9DOF IMU sensor
- 1x SH1.0-5P sensor cable
- 1x 10-pin, 2.54mm black single row pin header
Pinout
Dimensions
Onboard Sensors
Bosch BMI323 6軸慣性測量單元 (IMU)
緊湊型低功耗慣性測量單元，非常適合穿戴式裝置、聽戴式裝置和行動裝置。
Bosch BMM350 High-Performance Magnetometers
16-bit, 3-axis digital sensors with TMR technology.
Development Tools
DFRobot FireBeetle 2 ESP32-C5 Development Kit
Development platform includes the FireBeetle 2 ESP32-C5 microcontroller and an IO expansion shield.
DFRobot DFR1075 Development Board
Features a RISC-V processor, supporting Wi-Fi® 6, BLUETOOTH® 5, and Zigbee for smart homes.