AT3503 Hall Effect Sensor SMD SOT-23

AT3503 Hall Effect Sensor SMD SOT-23

The AT3503 Hall Effect Sensor is a compact, high-performance linear magnetic sensor designed for precision motion, position, and current detection. Housed in a space-saving SOT-23 package, this device converts magnetic fields into a stable ratiometric analog voltage, making it a versatile choice for engineers and product designers seeking reliable non-contact sensing solutions.

Unlike simple on/off digital Hall switches, the AT3503 provides a continuous voltage output proportional to the strength and polarity of the magnetic field. At zero field, the output sits near half the supply voltage, ensuring accurate detection of both north and south poles. With its sensitivity of approximately 1.3 mV/Gauss, it captures even small magnetic variations, ideal for demanding control and monitoring applications.

Features:

• Linear analog voltage output proportional to magnetic field strength.
• High sensitivity: 12–16 mV/mT (typical 14 mV/mT).
• Ratiometric output centered at VCC/2 for accurate bidirectional sensing.
• Operating voltage range: 4.5VDC–5.5VDC.
• Wide operating temperature range: –25 °C to +85 °C.
• Low supply current: 3–8 mA (typical 5 mA).

Specifications:

Pin Configuration:

• Pin 1: VCC – Supply voltage.
• Pin 2: GND – Ground.
• Pin 3: VOUT – Analog output voltage proportional to magnetic field.

Applications:

• Brushless DC motor commutation and speed control.
• Position and rotation sensing in industrial automation.
• Current sensing with external magnetic concentrators.
• Non-contact switches for automotive and consumer devices.
• Proximity sensing and security systems.
• Smart electronics requiring reliable magnetic field measurement.

Datasheet:

AT3503