Product Overview
The Allegro MicroSystems ALS31313 is an automotive-grade, 3-D linear Hall-effect sensor IC designed for versatile sensing applications. It provides a 12-bit digital output proportional to magnetic fields along the X, Y, and Z axes. Ideal for head-on linear motion, slide-by position sensing, and rotation angle measurements, it also features a joystick mode with a low-gain Z-axis option for back-bias magnet integration, eliminating the need for traditional spring solutions. Its advanced low-power management, including a 14 nA (typical) sleep mode current, makes it highly suitable for portable, battery-operated devices. The sensor offers selectable sensitivity ranges (500 G, 1000 G, 2000 G) and flexible I2C addressing, allowing multiple devices on a single bus. With 78 bits of user EEPROM and a configurable power management system, the ALS31313 enables system-level optimization for current and performance.
Product Attributes
- Brand: Allegro MicroSystems
- Product Line: Linear Hall-Effect Sensor
- Qualification: AEC-Q100 Automotive Qualified
- Package: 8-Pin TSSOP (LE)
- Lead Finish: 100% matte-tin leadframe plating
- Lead Status: Lead (Pb) free
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Sensing Axes | X, Y, Z | Three-axis linear Hall-effect |
| Digital Output | 12-bit | Corresponds to magnetic field strength |
| Sensitivity Ranges | 500 G, 1000 G, 2000 G | Factory-programmed options |
| Joystick Mode | Yes | Includes low gain option for Z-axis |
| I2C Interface | Up to 1 MHz (Fast Mode+) | Industry standard |
| I2C Addresses | 16 unique (external resistors) / 127 unique (EEPROM) | Multiple devices on the same bus |
| User EEPROM | 78 bits | Non-volatile storage |
| Power Supply | 2.65 V to 3.5 V single supply | |
| Sleep Mode Current | 14 nA (typical) | For portable, battery-operated applications |
| Low-Power Duty Cycle Mode Current | 12 A to 2 mA (typical) | Configurable average current |
| Operating Temperature Range | -40C to 125C | |
| ADC Resolution | 12-bit | 10-bit ENOB (Effective Number of Bits) |
| Sensitivity Accuracy | 1% (typ) | Factory-trimmed options |
| Integrated Temperature Sensor | Yes | 12-bit digital output |
| Power-On Delay Time | 600 s (typical) | |
| EEPROM Write Delay Time | 50 ms | |
| Model: ALS31313KLEATR-500 | X/Y Channel Sensitivity: 4 LSB/G | Z Channel Sensitivity: 4 LSB/G |
| Model: ALS31313KLEATR-1000 | X/Y Channel Sensitivity: 2 LSB/G | Z Channel Sensitivity: 2 LSB/G |
| Model: ALS31313KLEATR-2000 | X/Y Channel Sensitivity: 1 LSB/G | Z Channel Sensitivity: 1 LSB/G |
| Model: ALS31313KLEATR-JOY | X/Y Channel Sensitivity: 1 LSB/G | Z Channel Sensitivity: 0.25 LSB/G (reduced gain) |
2304140030_ALLEGRO-ALS31313KLEATR-JOY_C2654983.pdf
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