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DAIMU 303/333: CAN-Bus Integrated High-Precision Industrial IMU

SKU:DAIMU 303/333

DAIMU303 and DAIMU333 are high-performance, industrial-grade Inertial Measurement Units (IMUs) housed in anodized aluminum alloy casings. With dimensions of only 24×24×10mm and a weight of 6.5g, they combine rugged durability with a lightweight profile. These modules feature a built-in MCU with integrated EKF/UKF (Extended/Unscented Kalman Filter) algorithms and support both UART and CAN interfaces for plug-and-play integration, significantly reducing development complexity. Both products operate stably across a full temperature range of -40℃ to 85℃, featuring 2000g shock resistance, 10g vibration tolerance, and 100% magnetic shielding. They are calibrated via independent turntables and temperature drift compensation for maximum reliability. The core difference lies in their precision: DAIMU303 offers 2.5°/hr gyroscope bias instability and ±32g accelerometer range for high-dynamic scenarios, while DAIMU333 provides a superior 2.0°/hr gyroscope bias, 10mg accelerometer bias, and 0.02° Roll/Pitch accuracy for ultra-stable attitude requirements.

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DAIMU 303/333: CAN-Bus Integrated High-Precision Industrial IMU Modules

DAIMU303 and DAIMU333 are high-performance, industrial-grade Inertial Measurement Units (IMUs) housed in anodized aluminum alloy casings. With dimensions of only 24×24×10mm and a weight of 6.5g, they combine rugged durability with a lightweight profile. These modules feature a built-in MCU with integrated EKF/UKF (Extended/Unscented Kalman Filter) algorithms and support both UART and CAN interfaces for plug-and-play integration, significantly reducing development complexity. Both products operate stably across a full temperature range of -40℃ to 85℃, featuring 2000g shock resistance, 10g vibration tolerance, and 100% magnetic shielding. They are calibrated via independent turntables and temperature drift compensation for maximum reliability. The core difference lies in their precision: DAIMU303 offers 2.5°/hr gyroscope bias instability and ±32g accelerometer range for high-dynamic scenarios, while DAIMU333 provides a superior 2.0°/hr gyroscope bias, 10mg accelerometer bias, and 0.02° Roll/Pitch accuracy for ultra-stable attitude requirements.

2. Product Features

Compact & Rugged: Anodized aluminum alloy housing, 24×24×10mm size, weighing only 6.5g; supports UART and CAN interfaces, adapting to diverse industrial communication environments.
Dual-Precision Sensor Grades: Gyroscope bias instability of 2.5°/hr (303) / 2.0°/hr (333) and angular random walk as low as 0.6°/√hr; accelerometer options of 20mg (303) / 10mg (333) to meet specific high-precision needs.
Advanced Fusion Algorithms: Integrated complementary and Kalman filters (EKF/UKF) directly output high-precision 3-axis attitude angles, with Roll/Pitch accuracy reaching up to 0.02° (333) and Yaw accuracy of 0.2°.
Full Temperature Compensation & Interference Resistance: Fine temperature compensation across -40℃ to 85℃ ensures minimal drift; 100% magnetic shielding protects against external interference; resists 2000g shock and 10g vibration.
Military-Grade Reliability: Validated through four major production stages, including independent turntable calibration and multi-position non-orthogonal error correction; test yield rate of 99.9% with MTBF >1000 hours.

3. Detailed Technical Parameters

Parameter	DAIMU303	DAIMU333
Gyroscope Bias Instability	2.5°/hr	2.0°/hr
Gyroscope Angular Random Walk	0.8°/√hr	0.6°/√hr
Gyroscope Measurement Range	±2000°/s	±2000°/s
Accelerometer Bias Instability	±20mg	±10mg
Accelerometer Velocity Random Walk	0.12m/s/√hr	0.09m/s/√hr
Accelerometer Measurement Range	±32g	±16g
Roll Accuracy	0.04°	0.02°
Pitch Accuracy	0.04°	0.02°
Yaw Accuracy	0.2°	0.2°
Temperature Range	-40℃ ~ 85℃ (with temperature compensation)
Power Consumption	150mW
Input Voltage	3.3V ~ 16.0V
Hardware Interface	UART / CAN
Communication Protocol	AT Command Set / Extensible Formats
Weight	6.5g
Shock Resistance	2000g

4. Application Scenarios

UAV Flight Control: Ensures hovering stability and precise navigation even under wind disturbances.
Smart Robotics: Balance and navigation for industrial, service, and bionic robots.
Autonomous Driving Perception: Provides real-time, high-precision Roll, Pitch, and Yaw data for vehicle control.
Precision Industrial Control: Antenna stabilization, gimbal control, and robotic joint servo systems.

DAIMU Series Comparison

Specifications		DAIMU 101	DAIMU 131	DAIMU 301	DAIMU 331	DAIMU 303	DAIMU 333	DAIMU 351
Gyroscope	Bias Instability	4.5°/hr	4.0°/hr	3.0°/hr	3.0°/hr	2.5°/hr	2°/hr	0.2°/hr
	Angle Random Walk	0.8°/√hr	0.6°/√hr	0.8°/√hr	0.6°/√hr	0.8°/√hr	0.6°/√hr	0.2°/√hr
	Measuring Range	±2000°/s	±2000°/s	±2000°/s	±2000°/s	±2000°/s	±2000°/s	±4000°/s
Accelerometer	Bias Instability	0.12m/s/√hr	0.09m/s/√hr	0.12m/s/√hr	0.09m/s/√hr	0.12m/s/√hr	0.09m/s/√hr	0.032m/s/√hr
	Velocity Random Walk	20mg	10mg	20mg	10mg	20mg	10mg	30μg
	Measuring Range	±32g	±16g	±32g	±16g	±32g	±16g	±32g
Three-axis Angle Accuracy		/	/	Roll0.05° Pitch0.05° Yaw0.2°	Roll0.04° Pitch0.04° Yaw0.2°	Roll0.04° Pitch0.04° Yaw0.2°	Roll0.02° Pitch0.02° Yaw0.2°	Roll0.01° Pitch0.01° Yaw0.1°
Hardware Interfaces		SPI/IIC	SPI/IIC	UART/USB	UART/USB	UART/CAN	UART/CAN	UART/CAN
Power Consumption		10mW	10mW	120mW	120mW	150mW	150mW	300mW
Input Voltage		3.3V-8.0V	3.3V-8.0V	3.3V-16.0V	3.3V-16.0V	3.3V-16.0V	3.3V-16.0V	3.3V-16.0V
Refined Temperature Calibration		-40℃-85℃ Temperature Compensation
Communication Protocol Compatibility		/	/	AT Commands / Extendable Formats
Program Compatibility		STM32/ GD32/ Standard C Library
Dimensions (LWH) (mm)		12123.3 mm	12123.3 mm	15.415.4 3.5mm	15.415.4 3.5mm	242410m m	242410m m	43.543.5 28mm
Weight (g)		0.8g	0.8g	1.4g	1.4g	6.5g	6.5g	38g
Waterproof Grade		IPX0(Non-waterproof)						IPX68
High-intensity Working Condition Resistance		2000g (0.5ms, half-sine, 3-axis); 10g ultra-high vibration resistance (10-2kHz, 3-axis); 100% magnetic shielding