The QMI8658C is a complete 6D MEMS inertial measurement unit (IMU) with 9-axis sensor fusion and specified system level orientation accuracy. When using the QMI8658C in combination with the supplied XKF3 9D-sensor fusion, the system features an accurate ±3° pitch and roll orientation, and a ±5°yaw/heading typical specification.
With tight board-level gyroscope sensitivity of ±3%, gyroscope noise density of 15 mdps/√Hz, and low latency, the QMI8658C is ideal for high performance consumer and for industrial applications.
The QMI8658C incorporates a 3-axis gyroscope and a 3-axis accelerometer. It provides a UI interface (supporting I3C, I2C and 3-wire or 4-wire SPI) .
The QMI8658C incorporates an advanced vector digital signal processor (DSP) motion co-processor called the AttitudeEngine. The AttitudeEngine efficiently encodes high frequency motion at high internal sampling rates, preserving full accuracy across lower-frequency output data rates.
This enables the application to utilize low output data rates (ODRs) or on-demand (host polling) while still acquiring accurate 3D motion data. The AttitudeEngine reduces the data processing and interrupt load on a host processor with no compromises in 3D motion tracking accuracy. The result is very low total system power in combination with high accuracy, which are essential to many portable and battery powered applications.
▪ Low 15 mdps/√Hz gyroscope noise, low-latency, and wide bandwidth for performance applications such robotic vacuums, industrial tilt modules, pedestrian navigation and GNSS augmentation, 5G antenna stabilization, inertial navigation, and large industrial UAVs
▪ Low Noise 200µg/√Hz accelerometer
▪ Host (slave) interface supports MIPI™ I3C, I2C, and 3-wire or 4-wire SPI
▪ Accelerometer and gyroscope sensors feature signal processing paths with digitally programmable data rates and filtering
▪ Complete inertial measurement unit (IMU) with sensor fusion library with specified orientation accuracy of ±3º pitch and roll, ±5º yaw/heading
▪ High-performance XKF3TM 6/9-axis sensor fusion with in-run calibration for correction of gyroscope bias drift over-temperature and lifetime
▪ 3-axis gyroscope and 3-axis accelerometer in a small 2.5 x 3.0 x 0.86 mm 14-pin LGA package
▪ Integrated Gen 2 AttitudeEngineTM motion coprocessor with vector DSP performs sensor fusion at 1 kHz sampling rate, while outputting data to host processor at a lower rate – improving accuracy while reducing processor MIPS, power, and interrupt requirements
▪ Large 1536-byte FIFO can be used to buffer sensor data to lower system power dissipation
▪ Motion on demand technology for polling-based synchronization
▪ Large sensor dynamic ranges from ±16°/s to ±2048°/s for gyroscope and ±2 g to ±16 g for accelerometer
▪ Low power modes for effective power management
▪ Digitally programmable sampling rate and filters
▪ Embedded temperature sensor
▪ Wide extended operating temperature range (-40°C to 85°C)
