ALS31300 Datasheet | Allegro MicroSystems

3D Linear Hall-Effect Sensor with I2C Output and Advanced Low Power Management Features AND BENEFITS - X- and Y-axis sensing of joystick position - Z-axis sensing of “crouch” or push-button motion - Capable of operating with back-bias magnets for joystick return-to-zero - Ideal for battery-powered, low-voltage applications - 2.65 to 3.5 V single supply operation - 1 MHz I2C patibility down to 1.8 V - 14 n A (typ) Sleep ICC - 12 µA to 2 m A ICC (typ) in low-power duty cycle mode - Industry standard I2C interface for easy system integration - Up to 1 MHz (Fast Mode+) I2C munication - 16 selectable addresses via external resistor divider - 127 available address configurable via EEPROM - On-chip EEPROM - Stores factory- and user-configured settings - 78 bits of user EEPROM for additional storage - On-chip charge pump for easy programming Continued on next page... PACKAGE: 10-Contact DFN (EJ) Pin 1 Z Y Not to scale DESCRIPTION The ALS31300 3DMAG™ position sensor IC provides a 12-bit digital value corresponding to the magnetic field measured in each of the X, Y, and Z axes. The ALS31300 is preconfigured for use in 3D sensing applications for head-on linear motion, slide-by position sensing, and rotation angle measurements. The ALS31300 is also offered in joystick mode, including a low gain option for the Z axis channel. This feature enables the use of a back-bias magnet to provide return-to-zero force instead of traditional spring-based solutions. Three different factory-programmed sensitivity ranges are available: ±500 G, ±1000 G, and ±2000 G. The I2C address of the ALS31300 can be set either by external resistors (16 unique addresses) or programmed into EEPROM via I2C (127 unique addresses), allowing for multiple devices on the same bus. The ALS31300 also includes 78 bits of user EEPROM. Power management of the ALS31300 is highly configurable, allowing for system-level optimization of supply current and performance. Sleep mode consumes just 14 n A...