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 highly configurable power management, including a 14 nA typical sleep mode current, the ALS31300 is well-suited for portable, battery-operated applications. It offers multiple factory-programmed sensitivity ranges and flexible I2C addressing options for easy system integration.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: 10-Contact DFN (EJ)
- Lead Finish: 100% matte-tin leadframe plating
- Lead (Pb) Free: Yes
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | ALS31300 |
| Sensor Type | Three-axis linear Hall-effect |
| Output Resolution | 12-bit digital value |
| Supply Voltage | 2.65 V to 3.5 V single supply |
| I2C Compatibility | Up to 1 MHz (Fast Mode+), down to 1.8 V |
| Sleep Mode Current (typ) | 14 nA |
| Low-Power Duty Cycle Mode Current (typ) | 12 A to 2 mA |
| Package Dimensions | 3 mm 3 mm 0.8 mm |
| Operating Temperature Range | -40C to 85C |
| User EEPROM | 78 bits |
| I2C Addresses | 16 unique addresses via external resistors; 127 unique addresses programmable via EEPROM |
| Sensitivity Ranges | 500 G, 1000 G, 2000 G |
| Models & Sensitivities | |
| ALS31300EEJASR-500 | X/Y Channel Sensitivity: 4 LSB/G; Z Channel Sensitivity: 4 LSB/G (Full Scale: 500 G) |
| ALS31300EEJASR-1000 | X/Y Channel Sensitivity: 2 LSB/G; Z Channel Sensitivity: 2 LSB/G (Full Scale: 1000 G) |
| ALS31300EEJASR-2000 | X/Y Channel Sensitivity: 1 LSB/G; Z Channel Sensitivity: 1 LSB/G (Full Scale: 2000 G) |
| ALS31300EEJASR-JOY | X/Y Channel Sensitivity: 1 LSB/G; Z Channel Sensitivity: 0.25 LSB/G (Joystick mode) |
| ADC Accuracy | 10-bit ENOB (Effective Number of Bits) |
| Factory-Trimmed Sensitivity Accuracy | 1% (typ) |
| Integrated Temperature Sensor | Yes |
| Package Thermal Resistance (RJA) | 65 C/W (on 2-layer board) |
| EEPROM Write Cycles | 1000 writes |
2304140030_ALLEGRO-ALS31300EEJASR-500_C2654972.pdf
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