Product Overview
The Allegro MicroSystems ALS31313 is an automotive-grade, 3D 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, making it ideal for 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 return-to-zero solutions. With configurable power management, including a low 14 nA (typical) sleep current, it is well-suited for portable, battery-operated devices. The ALS31313 features an industry-standard I2C interface for easy system integration and offers multiple selectable sensitivity ranges: 500 G, 1000 G, and 2000 G.
Product Attributes
- Brand: Allegro MicroSystems
- Product Line: Linear Hall-Effect Sensor
- Qualification: AEC-Q100 automotive qualified
- Package: 8-pin TSSOP (LE)
- Lead Plating: 100% matte-tin leadframe plating
- Material: Lead (Pb) free
Technical Specifications
| Model/Attribute | Specification | Details |
|---|---|---|
| Sensing Axes | X, Y, and Z axes | |
| Output Resolution | 12-bit digital value | |
| Sensitivity Ranges | X/Y Channel Sensitivity | 500 G (4 LSB/G), 1000 G (2 LSB/G), 2000 G (1 LSB/G) |
| Z Channel Sensitivity | 500 G (4 LSB/G), 1000 G (2 LSB/G), 2000 G (1 LSB/G) | |
| Joystick Mode Z Channel Sensitivity | 0.25 LSB/G | |
| I2C Interface | Up to 1 MHz (Fast Mode+), 1.8 V and 3.0 V compatible | |
| I2C Addresses | External Resistors | 16 unique addresses |
| Programmed into EEPROM | 127 unique addresses | |
| EEPROM | 78 bits of user EEPROM | |
| Power Supply | Single Supply Operation | 2.65 V to 3.5 V |
| Current Consumption | Sleep Mode (typical) | 14 nA |
| Low-Power Duty Cycle Mode (typical average) | 12 A to 2 mA | |
| Operating Temperature Range | 40C to 125C | |
| Package Dimensions | 8-Pin TSSOP | |
| Accuracy | Factory-trimmed sensitivity options | 1% (typ) |
| Internal Components | 12-bit ADC, Temperature Sensor, Charge Pump, EEPROM Memory, Hall Elements | |
| Model Number Suffixes | Sensitivity | -500 (500 G), -1000 (1000 G), -2000 (2000 G), -JOY (Joystick Mode) |
| Package Type | LEA (8-lead TSSOP) | |
| Operating Temperature | K (40C to 125C) | |
| Example Part Numbers | ALS31313KLEATR-500, ALS31313KLEATR-1000, ALS31313KLEATR-2000, ALS31313KLEATR-JOY | |
2304140030_ALLEGRO-ALS31313KLEATR-1000_C2654977.pdf
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