Product Overview
The Allegro MicroSystems ALS31313 is an automotive-grade, 3D linear Hall-effect sensor IC designed for precise magnetic field measurement along X, Y, and Z axes. It provides a 12-bit digital output proportional to the magnetic field, making it ideal for applications such as head-on linear motion, slide-by position sensing, and rotation angle measurements. The device is also offered in a joystick mode with a low-gain Z-axis option, enabling the use of back-bias magnets for return-to-zero force, eliminating the need for traditional spring-based solutions. With advanced low-power management, including a typical 14 nA sleep current, the ALS31313 is well-suited for portable, battery-operated devices. Its flexible I2C interface allows for easy system integration with 16 unique addresses selectable via external resistors or 127 addresses programmable via EEPROM.
Product Attributes
- Brand: Allegro MicroSystems
- Product Line: ALS31313
- Qualification: AEC-Q100 Automotive Qualified
- Package: 8-Pin TSSOP (LE)
- Lead Plating: 100% Matte-Tin
- Material: Lead (Pb) Free
Technical Specifications
| Feature | Specification | Details | |
|---|---|---|---|
| Sensing Axes | X, Y, Z | ||
| Digital Output | 12-bit | ||
| Sensitivity Ranges (Full-Scale) | 500 G, 1000 G, 2000 G | ||
| Joystick Mode Sensitivity | X/Y Channel | 1 LSB/G | |
| Z Channel | 0.25 LSB/G | ||
| I2C Interface | Up to 1 MHz (Fast Mode+) | ||
| I2C Address Selection | External Resistors | 16 unique addresses | |
| EEPROM Programming | 127 unique addresses | ||
| User EEPROM | 78 bits | ||
| Supply Voltage | 2.65 V to 3.5 V single supply | ||
| I2C Compatibility | Down to 1.8 V | ||
| Sleep Current (ICC) | Typical | 14 nA | |
| Low-Power Duty Cycle Mode Current (ICC) | Typical | 12 A to 2 mA | |
| ADC Resolution | 12-bit | ||
| Effective Number of Bits (ENOB) | 10-bit | ||
| Factory-Trimmed Sensitivity Accuracy | Typical | 1% | |
| Integrated Temperature Sensor | Yes | ||
| Operating Temperature Range | 40C to 125C | ||
| Power-On Delay Time (tPOD) | Typical | 600 s | |
| EEPROM Write Delay Time | 50 ms | ||
| Package Thermal Resistance (RJA) | On 4-layer PCB | 145 C/W | |
| EEPROM Write Count | 1000 writes | ||
| Model | X/Y Channel Sensitivity | Z Channel Sensitivity | Packing |
| ALS31313KLEATR-500 | 4 LSB/G | 4 LSB/G | 4000 pieces per 13-inch reel |
| ALS31313KLEATR-1000 | 2 LSB/G | 2 LSB/G | 4000 pieces per 13-inch reel |
| ALS31313KLEATR-2000 | 1 LSB/G | 1 LSB/G | 4000 pieces per 13-inch reel |
| ALS31313KLEATR-JOY | 1 LSB/G | 0.25 LSB/G | 4000 pieces per 13-inch reel |
2106080104_ALLEGRO-ALS31313KLEATR-500_C2654988.pdf
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