ALLEGRO ASEK31300EEJA-500-DK

The ALS31300 3DMAG™ position sensor IC provides 12-bit digital values corresponding to the measured magnetic field along the X, Y, and Z axes. The sensor IC is preconfigured for 3D sensing applications, including front-side linear motion, sliding position sensing, and rotational angle measurement. The ALS31300 also features a joystick mode with a low-gain option for the Z-axis channel. This feature supports the use of a back-bias magnet to provide a centering force, replacing traditional spring solutions. The ALS31300 offers three factory-programmed sensitivity ranges: ±500G, ±1000G, and ±2000G. The I²C address can be set via an external resistor (16 unique addresses) or programmed into EEPROM via I²C (127 unique addresses), allowing multiple devices on the same bus. Additionally, the ALS31300 includes 78 bits of user EEPROM. The sensor's power management is highly configurable for system-level supply current and performance optimization. Sleep mode draws only 14nA (typical), making it ideal for portable battery-powered applications. The ALS31300 is available in a 3mm×3mm×0.8mm, 10-pin DFN package ("EJ"). This compact package is lead-free (Pb-free) with 100% matte tin-plated leadframe.

• X and Y axes for joystick position sensing
• Z-axis for "crouch" or button press detection
• Compatible with back-bias magnets for joystick zero positioning
• Ideal for battery-powered, low-voltage applications
• Single supply operation: 2.65V to 3.5V
• 1MHz I²C communication down to 1.8V
• ICC typical 14nA in sleep mode
• Icc typical 12μA to 2mA in low-power duty-cycle mode
• Industry-standard I²C interface for easy system integration
• I²C communication up to 1MHz (Fast Mode+)
• 16 selectable addresses via external resistor divider
• 127 available addresses configurable via EEPROM
• On-chip integrated EEPROM
• Stores factory and user configuration settings
• 78-bit user EEPROM for additional storage
• On-chip charge pump for simplified programming
• Flexible 12-bit ADC with 10 bits effective resolution
• Factory-calibrated sensitivity options: typical 1% accuracy (full-scale inputs of ±500G, ±1000G, and ±2000G)
• Integrated temperature sensor
• Wide ambient temperature range: -40°C to 85°C
• 10-pin 3mm×3mm×0.8mm DFN package for thin, high-density PCB designs and space-constrained applications