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Ultra-Low-Power, Programmable Linear Hall-Effect Sensors with SPI and I2C Interfaces
A31020-1
The Allegro A31020 and A31021 family of linear Hall-effect sensors are engineered for applications where power efficiency, design flexibility, and compact size are critical. Both sensors provide a precise, high-resolution digital output of the magnetic field strength and share an exceptionally low power profile, making them ideal for extending the operational life of battery-powered devices.
Housed in a tiny 2 mm x 2 mm DFN package, these sensors offer unparalleled flexibility through on-chip EEPROM, allowing engineers to configure the sensing axis (X or Z), sensitivity, and output modes (unipolar, bipolar, omnipolar) to meet specific application requirements.
Product Details
Product Details
Top Features
- Ultra-Low Power Consumption: Features a <30 nA sleep mode and multiple configurable power modes, enabling multi-year battery life in portable devices.
- Extreme Design Flexibility: On-chip EEPROM allows for I²C programming of sensitivity, sensing axis (X or Z), polarity, and output mode (Bipolar/Unipolar/Omnipolar), de-risking the design process.
- Simplified System Integration: A standard I²C interface allows the sensor to share a bus with other peripherals, saving valuable MCU pins.
- Miniature Footprint: The highly integrated design in a tiny 2x2 mm package eliminates the need for external signal conditioning components, reducing BOM cost and PCB size.
Target Application
