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Datasheet
High Sensitivity Unipolar Hall Effect Magnetic Switch Sensor With Open Drain Output In SOT-23-3 Package
The AH3322-SA-7 Digital Switch Unipolar Open Drain Hall Effect Sensor is a high-sensitivity magnetic sensing IC designed for proximity, position, and level detection applications in industrial and consumer electronics. Using advanced Hall-effect sensing technology, this unipolar magnetic switch detects the presence of a south magnetic pole and provides a stable open-drain digital output for contactless switching applications. Its wide operating voltage range and robust protection features make it suitable for industrial automation, home appliances, personal care devices, and embedded-system designs.
Built with a chopper-stabilized architecture and integrated bandgap regulator, the AH3322-SA-7 delivers stable magnetic switching performance across varying temperatures and supply voltages. The device 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, and Zener clamps improve operational reliability in electrically noisy environments and demanding industrial applications.
Key Features
- Unipolar Magnetic Detection: Detects the south magnetic pole for reliable contactless switching applications.
- High Sensitivity Hall Sensor: Optimized magnetic operation and release characteristics for accurate sensing.
- Open Drain Digital Output: Logic-compatible output suitable for embedded and industrial 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 Design: Provides improved temperature stability and minimal switch-point drift.
- Integrated Bandgap Regulator: Stable internal supply regulation across operating conditions.
- Overcurrent Protection: Output current limiting improves device reliability and protection.
- Reverse Blocking Protection: Integrated reverse blocking diode prevents reverse polarity damage.
- Integrated Zener Clamp: Additional supply and output protection for robust operation.
- Reliable Contactless Sensing: Eliminates mechanical wear and improves product lifespan.
- Good RF Noise Immunity: Stable operation in electrically noisy environments.
Applications
- Proximity sensing systems
- Position detection applications
- Fluid level sensing
- Industrial automation
- Consumer home appliances
- Personal care devices
- Embedded-system development
- Contactless magnetic switches
- Smart-home products
- Portable electronic devices
