Product Overview
The Allegro MicroSystems ALS31313 is an automotive-grade, 3D linear Hall-effect sensor IC designed for precise magnetic field measurement across X, Y, and Z axes. It provides a 12-bit digital output proportional to the magnetic field, making it ideal for 3D sensing applications such as head-on linear motion, slide-by position sensing, and rotation angle measurements. The sensor supports a joystick mode with a low-gain Z-axis option for back-bias magnet integration, eliminating the need for traditional spring-based solutions. It offers highly configurable power management, including a low-power sleep mode consuming as little as 14 nA (typical), making it suitable for portable, battery-operated devices. The ALS31313 features an industry-standard I2C interface for easy system integration and is available in multiple sensitivity ranges (500 G, 1000 G, 2000 G).
Product Attributes
- Brand: Allegro MicroSystems
- Qualification: AEC-Q100 automotive qualified
- Package: 8-Pin TSSOP (LE)
- Plating: 100% matte-tin leadframe plating
- Material: Lead (Pb) free
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Sensing Axes | X, Y, and Z axes | |
| Output Resolution | 12-bit digital value | |
| Sensitivity Options | 500 G, 1000 G, 2000 G | |
| Joystick Mode | Yes, with low gain option for Z axis | |
| I2C Interface | Up to 1 MHz (Fast Mode+), 1.8 V compatible | |
| I2C Addressing | 16 unique addresses via external resistors; 127 unique addresses programmable via EEPROM | |
| User EEPROM | 78 bits | |
| Power Supply | 2.65 V to 3.5 V single supply operation | |
| Supply Current (Sleep Mode) | 14 nA (typical) | |
| Supply Current (Low-Power Duty Cycle Mode) | 12 A to 2 mA (typical) | |
| Operating Temperature Range | -40C to 125C | |
| ADC Accuracy | 10-bit ENOB (Effective Number of Bits) | |
| Factory-Trimmed Sensitivity Accuracy | 1% (typical) | |
| Integrated Components | Temperature sensor, charge pump | |
| Part Number Examples | ALS31313KLEATR-500 | 500 G range |
| ALS31313KLEATR-1000 | 1000 G range | |
| ALS31313KLEATR-2000 | 2000 G range | |
| ALS31313KLEATR-JOY | Joystick mode | |
| Package Dimensions | TSSOP8 | Refer to Package Outline Drawing |
2304140030_ALLEGRO-ALS31313KLEATR-2000_C2654975.pdf
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