Hall Effect Sensor (Hall Element)

A Hall element is a transducer that varies its output voltage in response to a magnetic field. It is based on the Hall effect principle.

• Principle: When a current-carrying conductor is placed in a magnetic field perpendicular to the current, a voltage (Hall voltage) is generated perpendicular to both the current and the magnetic field.
• Applications: Position sensing, speed detection (e.g., in motors), proximity switching, current sensing.
• Types:
  • Analog Output: Outputs continuous voltage proportional to magnetic field strength.
  • Digital Output: Switches ON/OFF when magnetic field exceeds threshold (unipolar, bipolar, or omnipolar).
• Key Parameters:
  • Sensitivity (mV/G or mV/mT)
  • Operating Voltage (e.g., 3.3V, 5V)
  • Output Type (Analog/Digital)
  • Temperature Range
• Common ICs: A1302 (analog), SS49E (linear), US1881 (digital switch), DRV5053.

Note: Ensure proper orientation of magnetic field (usually perpendicular to face of sensor) for reliable operation.