Product Overview
The Allegro MicroSystems ALS31300 is a 12-bit, three-axis linear Hall-effect sensor IC designed for 3D sensing applications. It provides a digital output proportional to the magnetic field along the X, Y, and Z axes, making it suitable for head-on linear motion, slide-by position sensing, and rotation angle measurements. The sensor features a configurable I2C interface, advanced low-power management with a typical sleep current of 14 nA, and multiple factory-programmed sensitivity ranges (500 G, 1000 G, 2000 G). It is offered in a compact 3 mm x 3 mm DFN package, ideal for portable, battery-operated, and space-constrained applications. The ALS31300 also supports a joystick mode with a low-gain Z-axis option, enabling return-to-zero force functionality with back-bias magnets.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: 10-Contact DFN (EJ)
- Lead Plating: 100% matte-tin
- Certifications: Lead (Pb) free
Technical Specifications
| Model/Specification | Details |
|---|---|
| Product Name | ALS31300 3-D Linear Hall-Effect Sensor |
| Axes | X, Y, Z |
| Resolution | 12-bit digital value |
| Sensitivity Ranges | 500 G, 1000 G, 2000 G |
| Interface | I2C (up to 1 MHz) |
| I2C Addresses | 16 unique addresses (external resistors) or 127 unique addresses (EEPROM) |
| User EEPROM | 78 bits |
| Supply Voltage | 2.65 V to 3.5 V (single supply) |
| Sleep Current (Typical) | 14 nA |
| Low-Power Duty Cycle Mode Current (Typical) | 12 A to 2 mA |
| Package Dimensions | 3 mm 3 mm 0.8 mm |
| Operating Temperature Range | -40C to 85C |
| ALS31300EEJASR-500 Sensitivity | 500 G |
| ALS31300EEJASR-1000 Sensitivity | 1000 G |
| ALS31300EEJASR-2000 Sensitivity | 2000 G |
| ALS31300EEJASR-JOY Sensitivity | X/Y: 2000 G, Z: 8000 G (reduced Z-axis gain) |
| Temperature Sensor Accuracy | 1% typical factory-trimmed sensitivity |
| On-chip EEPROM | Stores factory and user-configured settings |
| ADC | 12-bit with 10-bit ENOB |
2412052036_ALLEGRO-ALS31300EEJASR-1000_C2655001.pdf
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