Product Overview
The ALS31300 is a three-axis linear Hall-effect sensor IC that provides a 12-bit digital value 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, it is ideal for portable, battery-operated applications. The ALS31300 offers flexible I2C addressing and is supplied in a compact 3 mm x 3 mm x 0.8 mm DFN package.
Product Attributes
- Brand: Allegro MicroSystems
- Package: 10-Contact DFN (EJ)
- Lead Free: Yes
- Leadframe Plating: 100% matte-tin
Technical Specifications
| Model/Feature | Description | Value | Unit |
|---|---|---|---|
| Product Name | 3-D Linear Hall-Effect Sensor with I2C Output and Advanced Low Power Management | ALS31300 | |
| Sensing Axes | X, Y, Z | ||
| Output Resolution | 12-bit digital value | ||
| Sensitivity Ranges | 500 G, 1000 G, 2000 G | ||
| Joystick Mode | Available, with low gain option for Z axis | ||
| I2C Addresses | 16 unique (external resistors), 127 unique (EEPROM) | ||
| User EEPROM | 78 bits | ||
| Sleep Mode Current | Typical | 14 | nA |
| Package Dimensions | 3 x 3 x 0.8 | mm | |
| Supply Voltage | Single supply operation | 2.65 to 3.5 | V |
| I2C Compatibility | Up to 1 MHz (Fast Mode+), down to 1.8 V | ||
| Low-Power Duty Cycle Mode Current | Typical | 12 A to 2 mA | |
| Operating Temperature Range | -40 to 85 | C | |
| Accuracy (typ) | Factory-trimmed sensitivity | 1 | % |
| ADC ENOB | 10 | bits | |
| ALS31300EEJASR-500 | X/Y Channel Sensitivity | 4 | LSB/G |
| ALS31300EEJASR-500 | Z Channel Sensitivity | 4 | LSB/G |
| ALS31300EEJASR-1000 | X/Y Channel Sensitivity | 2 | LSB/G |
| ALS31300EEJASR-1000 | Z Channel Sensitivity | 2 | LSB/G |
| ALS31300EEJASR-2000 | X/Y Channel Sensitivity | 1 | LSB/G |
| ALS31300EEJASR-2000 | Z Channel Sensitivity | 1 | LSB/G |
| ALS31300EEJASR-JOY | X/Y Channel Sensitivity | 1 | LSB/G |
| ALS31300EEJASR-JOY | Z Channel Sensitivity | 0.25 | LSB/G |
| Power-On Delay Time (typ) | 600 | s | |
| EEPROM Write Delay Time | 50 | ms | |
| Offset Error X/Y Axes (typ) | 13.4 | LSB | |
| Offset Error Z Axis (typ) | 11.8 | LSB | |
| Sensitivity Error X/Y Axes (typ) | 0.7 | % | |
| Sensitivity Error Z Axis (typ) | 0.6 | % | |
| RMS Noise X/Y Channels (typ) | BW Select = 0 | 4 | LSB |
| RMS Noise Z Channel (typ) | BW Select = 0 | 1.5 | LSB |
2304140030_ALLEGRO-ALS31300EEJASR-JOY_C2654973.pdf
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