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Datasheet
High Sensitivity Omnipolar Hall Effect Magnetic Switch Sensor With Open Drain Output In SOT-23-3 Package
The AH3572-SA-7 Digital Switch Omnipolar Open Drain Hall Effect Sensor is a high-sensitivity magnetic sensing IC designed for reliable proximity, position, and level detection applications. Using advanced Hall-effect sensing technology, this omnipolar sensor detects both north and south magnetic poles and provides a digital open-drain output for embedded systems, industrial automation, smart-home devices, and consumer electronics. Its wide operating voltage range and robust protection features make it suitable for demanding industrial and automotive environments.
Built with a chopper-stabilized architecture and integrated bandgap regulator, the AH3572-SA-7 delivers stable magnetic switching performance across wide temperature and supply-voltage ranges. The sensor supports operation from 3.0 V to 28 V, enabling compatibility with both low-voltage microcontrollers and industrial control systems. Integrated reverse blocking protection, overcurrent limiting, Zener clamps, and high ESD immunity improve reliability and system protection in harsh operating conditions.
Key Features
- Omnipolar Magnetic Detection: Detects both north and south magnetic poles for flexible switching applications.
- High Sensitivity Hall Sensor: Typical BOP and BRP values of +-20 G and -10 G.
- Open Drain Digital Output: Single open-drain output compatible with multiple logic voltage systems.
- Wide Operating Voltage Range: Supports 3.0 V to 28 V power supply operation.
- Compact SOT-23-3 Package: Small surface-mount package suitable for compact PCB layouts.
- Chopper Stabilized Architecture: Improves temperature stability and reduces switch-point drift.
- Overcurrent Protection: Integrated output current limiting improves device safety.
- Reverse Blocking Protection: A reverse blocking diode protects against incorrect polarity connection.
- Integrated Zener Clamp: Protection on supply and output pins for enhanced robustness.
- High ESD Immunity: Human Body Model ESD protection greater than 6 kV.
- Wide Temperature Range: Supports operation from -40 degrees C to +125 degrees C.
- Good RF Noise Immunity: Improved reliability in noisy electronic environments.
Applications
- Proximity sensing systems
- Position detection applications
- Fluid level sensing
- Smart-home devices
- Industrial automation
- Office equipment
- Consumer electronics
- Embedded-system development
- Contactless switching systems
- Automotive sensing applications
