Product Overview
The A31301 is a flexible three-axis Hall-effect sensor IC designed for precise magnetic flux density measurement across one, two, or three axes, and for calculating angles in user-defined planes. Available in three field configurations (600 G, 1400 G, 2000 G) and preconfigured for SPI or I2C interfaces, it offers customer-programmable magnetic temperature coefficients with a factory default for neodymium magnets. Supporting high-speed SPI (up to 10 MHz) and I2C (up to 1 MHz) with flexible addressing options, the A31301 is ideal for battery-operated applications due to its low leakage sleep current and configurable power management. Its compact 3 mm 3 mm DFN package makes it suitable for space-constrained designs.
Product Attributes
- Brand: Allegro MicroSystems
- Package: 10-Contact DFN (EJ)
- Lead-Free: Yes
- Leadframe Plating: 100% matte-tin
Technical Specifications
| Model | Interface | Field Range (G) | Packing |
|---|---|---|---|
| A31301EEJASR-XYZ-IC-06 | I2C | 600 | 6000 pieces per 13-inch reel |
| A31301EEJASR-XYZ-IC-14 | I2C | 1400 | 6000 pieces per 13-inch reel |
| A31301EEJASR-XYZ-IC-20 | I2C | 2000 | 6000 pieces per 13-inch reel |
| A31301EEJASR-XYZ-SI-06 | SPI | 600 | 6000 pieces per 13-inch reel |
| A31301EEJASR-XYZ-SI-14 | SPI | 1400 | 6000 pieces per 13-inch reel |
| A31301EEJASR-XYZ-SI-20 | SPI | 2000 | 6000 pieces per 13-inch reel |
Key Features & Benefits
- Flexible operating modes: Measure in 1, 2, or 3 axes.
- 15-bit angle output from any selectable 2-axes plane.
- Low RMS angle noise for high system resolution.
- SPI and I2C interfaces for easy system integration (up to 10 MHz SPI, 1 MHz I2C).
- Ideal for battery-powered, low-voltage applications (2.65 to 3.6 V analog supply, 1.8 to 3.6 V digital supply).
- Low leakage sleep current and low-power duty cycle mode options.
- Multifunction pin for interrupt and sample-start functionality.
- On-chip EEPROM for storing factory and customer-configured settings.
- Low-profile 3 mm 3 mm DFN package for space-constrained applications.
- Operating temperature range: 40C to 85C.
Applications
- Camera gimbals
- Gamepad joysticks
- Motor control feedback
- RC autonomous vehicles
- Robotic position sensing
- Industrial motor control
Technical Specifications Summary
| Characteristic | Symbol | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | Normal operation | 2.65 | 3.0 | 3.6 | V |
| Digital Supply Voltage | VCC_IO | VCC_IO VCC | 1.7 | - | VCC | V |
| Active Supply Current | ICC(ACTIVE) | Active state | - | 3.8 | 4.75 | mA |
| Sleep Supply Current | ICC(SLEEP) | VCC = 3.0 V, OP_MODE = 3, 4 | - | 2.5 | - | A |
| SPI Clock Frequency | fSPI | - | 0.1 | - | 10 | MHz |
| I2C Clock Frequency | fCLK | - | - | 400 | 1000 | kHz |
| Operating Ambient Temperature | TA | Range E | 40 | - | 85 | C |
| Package Thermal Resistance | RJA | Measured on 2-layer board | - | 65 | - | C/W |
Package Dimensions
DFN10 (EJ) Package
Dimensions: 3 mm 3 mm 0.8 mm
2408081041_ALLEGRO-A31301EEJASR-XYZ-IC-06_C22406100.pdf
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