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 supports a joystick mode with a low-gain option for the Z-axis, enabling the use of back-bias magnets for return-to-zero force, eliminating the need for traditional spring-based solutions. With advanced low-power management, including a sleep mode consuming only 14 nA (typical), the ALS31300 is ideal for portable, battery-operated applications. It features a configurable I2C interface for easy system integration and offers multiple selectable I2C addresses.
Product Attributes
- Brand: Allegro MicroSystems
- Package: 10-Contact DFN (EJ)
- Lead Finish: 100% matte-tin leadframe plating
- Lead (Pb) Status: Lead (Pb) free
Technical Specifications
| Model | X/Y Channel Sensitivity (LSB/G) | Z Channel Sensitivity (LSB/G) | Full-Scale Input Range | Supply Voltage (VCC) | Sleep ICC (typ) | I2C Compatibility | Package Dimensions (mm) |
|---|---|---|---|---|---|---|---|
| ALS31300EEJASR-500 | 4 | 4 | 500 G | 2.65 to 3.5 V | 14 nA | Up to 1 MHz (Fast Mode+), down to 1.8 V | 3 x 3 x 0.8 |
| ALS31300EEJASR-1000 | 2 | 2 | 1000 G | 2.65 to 3.5 V | 14 nA | Up to 1 MHz (Fast Mode+), down to 1.8 V | 3 x 3 x 0.8 |
| ALS31300EEJASR-2000 | 1 | 1 | 2000 G | 2.65 to 3.5 V | 14 nA | Up to 1 MHz (Fast Mode+), down to 1.8 V | 3 x 3 x 0.8 |
| ALS31300EEJASR-JOY | 1 | 0.25 | X/Y: 2000 G, Z: 8000 G | 2.65 to 3.5 V | 14 nA | Up to 1 MHz (Fast Mode+), down to 1.8 V | 3 x 3 x 0.8 |
| Characteristic | Symbol | Conditions | Value | Unit |
|---|---|---|---|---|
| Supply Voltage | VCC | Normal operation | 2.65 - 3.0 - 3.5 | V |
| Supply Current (Active) | ICC(ACTIVE) | Sleep = 0, or active state | 3.4 | mA |
| Supply Current (Sleep) | ICC(SLEEP) | VCC = 3.0 V, Sleep mode = 1 | 14 | nA |
| Operating Ambient Temperature | TA | Range E | 40 to 85 | C |
| Sensitivity Error (X/Y Axes) | ESENS(XY) | BIN = BIN(MAX) | 2.5 0.7 2.5 | % |
| Sensitivity Error (Z Axis) | ESENS(Z) | BIN = BIN(MAX) | 4.5 0.6 4.5 | % |
| RMS Noise (X/Y Channels) | NRMS(XY) | BW Select = 0 | 4 | LSB |
| RMS Noise (Z Channel) | NRMS(Z) | BW Select = 0 | 1.5 | LSB |
| I2C Clock Frequency | fCLK | 400 1000 | kHz |
2304140030_ALLEGRO-ALS31300EEJALU-JOY_C2152908.pdf
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