Electronic compass GCM387

3D

Product overview
The GCM387 is a 3D electronic compass module integrating a triaxial magnetometer and a triaxial accelerometer. It uses 24-point rotating acquisition and calibration to improve magnetic interference handling and simplifies operation. Integrated full-range (±180°) tilt compensation ensures accurate heading under complex attitudes. Dual RS232/TTL communication and a compact form factor enable flexible integration in industrial orientation systems.

Applications

• Handheld devices
• Mobile terminals
• Antenna stabilization
• Vehicle navigation
• System integration for orientation measurement

Key features

• Azimuth accuracy: 0.5°
• Tilt resolution: 0.1°
• Tilt accuracy: <0.2° (full range)
• Tilt measurement range: pitch ±85°, roll ±180°
• Hard-iron and soft-iron calibration supported
• Magnetic interference calibration: 24-point rotation acquisition
• Startup delay: <50 ms
• Maximum output rate: 20 Hz
• Communication: RS232/TTL, 2400–115200 baud
• Output format: binary high-performance protocol
• Typical current: 50 mA
• Operating temperature: -40 °C to +85 °C
• Dimensions: 33 × 27 × 9.5 mm; Weight: <15 g
• EMC: Compliant with EN61000 and GBT17626
• Shock / Vibration: 100 g @11 ms (triaxial), vibration 10 grms 10–1000 Hz
• MTBF: ≥99,000 hours

Product introduction
The GCM387 combines high-resolution sensing and noise suppression in a compact, low-power module. Its integrated accelerometer enables reliable tilt compensation across the full ±180° range, maintaining heading stability in environments with fixed magnetic interference. The module is suitable for applications that require precise orientation data and straightforward system integration.

Technical specifications

• Model: GCM387
• Optimal heading accuracy: 0.5°
• Heading resolution: 0.1°
• Tilt resolution: 0.1°
• Pitch accuracy: 0.1° (<15°), 0.1° (<30°), 0.1° (<60°), 0.2° (<85°)
• Roll accuracy: 0.1° (<15°), 0.1° (<30°), 0.1° (<60°), 0.2° (<180°)
• Pitch range: ±85°
• Roll range: ±180°
• Hard iron / Soft iron calibration: Yes
• Magnetic calibration method: 24-point rotation acquisition
• Startup delay: <50 ms
• Maximum output rate: 20 Hz
• Communication rate: 2400–115200 baud (RS232/TTL)
• Output format: Binary high-performance protocol
• Typical current: 50 mA
• Sleep mode: TBD
• Operating / Storage temperature: -40 °C to +85 °C
• Vibration resistance: 100 g
• Insulation resistance: ≥100 MΩ
• Shock resistance: 100 g @11 ms, triaxial (half-sine)
• Vibration spec: 10 grms, 10–1000 Hz
• Dimensions: 33 × 27 × 9.5 mm
• Weight: <15 g