Description

The CJMCU AK09911C is a compact 3-axis magnetometer module based on the AK09911C sensor. It uses Hall-effect technology to accurately detect geomagnetic fields, providing precise heading and orientation data. This module is ideal for use in portable devices such as smartphones, wearables, drones, and GPS systems, offering low power consumption, high sensitivity, and an easy-to-integrate I2C interface for navigation and other direction-sensing applications.

Key Features & Benefits

• High Sensitivity: 0.6 µT/LSB for accurate magnetic field detection.
• Low Power Consumption: 3 µA in power-down mode, 2.4 mA during measurement.
• Fast I2C Interface: Supports speeds up to 2.5 MHz.
• Self-Test Function: Built-in magnetic source for sensor verification.
• Compact Size: Small form factor for easy integration into portable devices.

Applications

• Pedestrian Navigation: For GPS-based city navigation in mobile devices.
• Portable Electronics: Used in wearables, smartphones, and tablets.
• Autonomous Systems: Provides heading data for robotics and drones.
• Geospatial and Mapping Tools: Essential for geographic positioning applications.

Specifications

AK09911C Sensor (used in the module):

• Resolution: 14-bit (0.6 µT/LSB)
• Measurement Range: ±4900 µT (microteslas)
• Output Data: 14-bit digital data for each of the 3-axis magnetic components
• Interface: I2C (Standard, Fast, and High-Speed modes, up to 2.5 MHz)
• Operating Voltage:
  • Analog: 2.4V to 3.6V
  • Digital Interface: 1.65V to the analog supply voltage
• Temperature Range: -30˚C to +85˚C
• Current Consumption:
  • Power-down Mode: 3 µA (typical)
  • Measurement Mode: 2.4 mA (typical at 100 Hz)
• Built-in Features:
  • Internal Oscillator: No external clock required
  • Data Ready (DRDY): Indicator for when measurement data is ready
  • Self-Test: Built-in magnetic source for sensor functionality verification