SCH1633-D01 (Murata 6-axis MEMS IMU, SCH1600 Series) | Automotive 6DoF Inertial Measurement Unit

 SCH1633-D01

One-sentence definition**: Murata automotive-grade 6 Degrees of Freedom (6DoF) Inertial Measurement Unit. It integrates a 3-axis gyroscope and a 3-axis accelerometer in a single chip, compliant with AEC-Q100 Grade1 and ISO26262 ASIL-D, packaged in SOIC-24. It is an automotive central inertial navigation IMU.

 Key Parameters

- Gyroscope range: ±300°/s; Primary acceleration channel ±8g, redundant acceleration channel up to ±26g

- Gyro bias stability: as low as 0.5°/h; Angular random walk: 0.03°/√Hz

- Operating temperature: -40℃ ~ +110℃

- Power supply: 3.0~3.6V, SPI interface (SafeSPI v2.0), with timestamp and SYNC sync input, over 200 internal self-test monitoring signals

- Factory-performed axis orthogonality calibration to reduce customers’ backend calibration cost

 Functions & Features

1. 3-axis angular velocity measurement (gyroscope): Captures pitch/roll/yaw rotation rates of the vehicle to determine body attitude and steering motion.

2. 3-axis acceleration measurement (accelerometer): Captures vehicle linear acceleration and gravity tilt for inclination calculation.

3. Time synchronization + timestamp: Supports multi-sensor data fusion with GNSS, cameras, radars and LiDAR to eliminate time misalignment between sensors, a core capability for autonomous driving perception fusion.

4. Dead Reckoning (DR): Continuously estimates vehicle position via IMU when GPS/Beidou signals are lost (in tunnels, underground parking garages or under tall buildings).

5. Safety diagnostics: Extensive internal self-tests to meet automotive functional safety requirements for safety-related chassis systems.

6. Attitude output: Vehicle tilt angle and dynamic attitude for camera stabilization/correction and automatic headlamp leveling.

 Application Scope (Automotive-focused)

- ADAS (Advanced Driver Assistance Systems): ACC, lane keeping, automatic emergency braking, etc.

- Autonomous Driving (AD): L2~L4 vehicle central inertial navigation, GNSS+IMU integrated positioning

- Vehicle chassis control: Electronic stability control, dynamic attitude monitoring

- Perception sensor calibration: Tilt compensation for onboard cameras and LiDAR

- Dynamic headlamp leveling: Complies with UNECE regulations for headlamp leveling

> Positioning: Central vehicle IMU. One component provides inertial data shared by multiple in-vehicle subsystems to lower BOM cost.