Product Overview
The Allegro 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. Preconfigured for 3D sensing applications such as head-on linear motion, slide-by position sensing, and rotation angle measurements, it also offers a joystick mode with a low-gain Z-axis option, enabling the use of back-bias magnets for return-to-zero force. With three factory-programmed sensitivity ranges (500 G, 1000 G, 2000 G) and flexible I2C addressing, the ALS31300 is ideal for portable, battery-operated applications due to its highly configurable power management, including a typical 14 nA sleep mode current. Its compact 3 mm 3 mm 0.8 mm DFN package makes it suitable for space-constrained designs.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: 10-Contact DFN (EJ)
- Lead Plating: 100 % matte-tin
- Lead (Pb) Free: Yes
Technical Specifications
| Characteristic | Model/Value | Details |
|---|---|---|
| Product Name | ALS31300 | |
| Sensor Type | Three-axis linear Hall-effect | |
| Output | 12-bit digital value | |
| Sensitivity Ranges | ALS31300EEJASR-500 | 500 G |
| ALS31300EEJASR-1000 | 1000 G | |
| ALS31300EEJASR-2000 | 2000 G | |
| ALS31300EEJASR-JOY | X/Y: 2000 G, Z: 8000 G (with reduced gain on Z) | |
| Interface | I2C (up to 1 MHz Fast Mode+) | |
| I2C Addressing | External Resistors | 16 unique addresses |
| EEPROM Programming | 127 unique addresses | |
| User EEPROM | 78 bits | |
| Power Modes | Active Mode | N/A |
| Sleep Mode | 14 nA (typical) | |
| Low-Power Duty Cycle Mode (LPDCM) | 12 A to 2 mA (typical) | |
| Supply Voltage | 2.65 V to 3.5 V single supply | |
| Package Dimensions | 3 mm 3 mm 0.8 mm | |
| Operating Temperature Range | 40C to 85C | |
| ADC Resolution | 12-bit | |
| Accuracy | 1% (typ) factory-trimmed sensitivity | |
| Integrated Temperature Sensor | Yes | |
| Typical Application Scenarios | 3D sensing, head-on linear motion, slide-by position sensing, rotation angle measurements, joystick mode, battery-powered devices | |
2304140030_ALLEGRO-ALS31300EEJALU-1000_C2152953.pdf
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