Product Overview
The ALS31300 is a three-axis linear Hall-effect sensor IC that provides a 12-bit digital output proportional to the magnetic field along the X, Y, and Z axes. It is preconfigured for 3D sensing applications including head-on linear motion, slide-by position sensing, and rotation angle measurements. The device also features a joystick mode with a low-gain option for the Z-axis, enabling the use of back-bias magnets for return-to-zero force. With its advanced low-power management, including a sleep mode consuming only 14 nA (typical), the ALS31300 is ideal for portable, battery-operated applications. The I2C interface allows for flexible addressing and easy system integration.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: 10-Contact DFN (EJ)
- Lead Plating: 100 % matte-tin
- Certifications: Lead (Pb) free
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | ALS31300 |
| Sensor Type | Three-axis linear Hall-effect sensor |
| Output Resolution | 12-bit digital value |
| Interface | I2C |
| Supply Voltage | 2.65 V to 3.5 V (single supply) |
| I2C Clock Speed | Up to 1 MHz (Fast Mode+) |
| Sleep Mode Current | 14 nA (typical) |
| Package Dimensions | 3 mm 3 mm 0.8 mm |
| Operating Temperature Range | 40C to 85C |
| User EEPROM | 78 bits |
| Sensitivity Ranges | 500 G, 1000 G, 2000 G |
| I2C Address Configuration | 16 unique addresses via external resistors; 127 unique addresses programmable via EEPROM |
| Joystick Mode Z-Axis Gain | Low gain option available |
| ADC Resolution | 12-bit with 10-bit ENOB |
| Sensitivity Accuracy | 1% (typical) factory-trimmed |
| Part Number Example | ALS31300EEJASR-500 |
| Model: ALS31300EEJASR-500 | X/Y Channel Sensitivity: 4 LSB/G, Z Channel Sensitivity: 4 LSB/G, Packing: 6000 pieces per 13-inch reel |
| Model: ALS31300EEJASR-1000 | X/Y Channel Sensitivity: 2 LSB/G, Z Channel Sensitivity: 2 LSB/G, Packing: 6000 pieces per 13-inch reel |
| Model: ALS31300EEJASR-2000 | X/Y Channel Sensitivity: 1 LSB/G, Z Channel Sensitivity: 1 LSB/G, Packing: 6000 pieces per 13-inch reel |
| Model: ALS31300EEJASR-JOY | X/Y Channel Sensitivity: 1 LSB/G, Z Channel Sensitivity: 0.25 LSB/G, Packing: 6000 pieces per 13-inch reel |
2304140030_ALLEGRO-ALS31300EEJALU-2000_C2153020.pdf
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