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Allegro MicroSystems ALS31300EEJALU-1000
- Part No.:
- ALS31300EEJALU-1000
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
ALS31300EEJALU-1000.pdf
- Description:
- SENSOR HALL EFFECT I2C 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,924
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Product details
Overview
ALS31300EEJALU-1000 from Allegro MicroSystems is a 3D linear Hall-effect position sensor IC delivering 12-bit digital X/Y/Z magnetic field outputs with ±1000 G full-scale range, 2 LSB/G sensitivity, and 14 nA typical sleep current. It supports head-on linear motion, slide-by sensing, and rotation angle measurement in compact space-constrained systems.
For engineers reviewing the ALS31300EEJALU-1000 datasheet, ALS31300EEJALU-1000 pinout, ALS31300EEJALU-1000 application, or ALS31300EEJALU-1000 equivalent, this page delivers verified technical context, I2C address configuration options (16 resistor-based or 127 EEPROM-programmable), low-power duty cycle modes, integrated temperature sensing, and factory-trimmed ±1% sensitivity accuracy.
Technical Context
The ALS31300EEJALU-1000 implements a 3-axis linear Hall sensing architecture with independent X/Y/Z channel ADCs, configurable bandwidth selection (BW Select 0–7), and on-chip charge pump for EEPROM programming. Its digital controller manages I2C Fast Mode+ (1 MHz) communication, interrupt generation, and volatile register access across primary addresses 0x27–0x29.
Power management includes three distinct operating modes: Active (3.4 mA typ), Low-Power Duty Cycle Mode (2 mA to 12 µA avg), and Sleep (14 nA typ). The device integrates a 12-bit temperature sensor updated every 8 ms, with output accessible via same I2C interface and co-located in registers 0x28–0x29.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.65 V to 3.5 V - Enables direct integration into 3.3 V logic systems without level shifting. |
| Sensing Range (X/Y) | ±1000 G - Matches common NdFeB magnet field strengths for robust linear position detection. |
| Sensitivity (X/Y) | 2 LSB/G - Provides 0.5 G resolution for precise sub-millimeter motion tracking. |
| Sleep Current | 14 nA (typ) - Supports multi-year battery life in portable IoT and wearable sensors. |
| I²C Speed | Up to 1 MHz (Fast Mode+) - Allows high-throughput polling in real-time control loops. |
| EEPROM Capacity | 78 bits user-accessible - Stores calibration offsets, system IDs, or custom configuration without external memory. |
| Operating Temp | –40°C to +85°C - Qualified for industrial and automotive cabin environments. |
| Package | 10-contact 3 mm × 3 mm × 0.8 mm DFN (EJ) - Enables high-density PCB layout in ultra-thin enclosures. |
Pinout & Package
ALS31300EEJALU-1000 is housed in a lead-free, 10-contact DFN package (EJ) with 100% matte-tin leadframe plating and an exposed thermal pad (not internally connected). Dimensions: 3.0 mm × 3.0 mm × 0.8 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Requires 0.1 µF bypass capacitor to GND; supports 2.65–3.5 V operation. |
| ADR0 | I²C address select 0 | Part of 2-pin resistor divider to set one of 16 hardware I²C addresses (0–15). |
| GND | Ground reference | Common return path for analog and digital circuits; connects to exposed pad. |
| INT | Interrupt output | Open-drain signal indicating threshold crossing; configurable latching and polarity via EEPROM. |
| NC (Pins 5,9,10) | No internal connection | Must be tied to GND per datasheet; no routing or signal assignment required. |
| ADR1 | I²C address select 1 | Second pin of resistor divider; enables full 16-address hardware selection matrix. |
| SDA | I²C serial data | Open-drain bidirectional line; requires external pull-up (2.4–10 kΩ) to VCC. |
| SCL | I²C serial clock | Input-only clock line; supports up to 1 MHz timing with defined setup/hold constraints. |
| PAD | Exposed thermal pad | Not electrically connected; must be soldered to PCB copper for thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed sensitivity | ±1% accuracy over ±1000 G range - eliminates system-level calibration for most motion-sensing applications. |
| Configurable power modes | Three discrete states (Active/Sleep/LPDCM) with 14 nA sleep ICC - enables adaptive energy budgeting in battery-powered devices. |
| Integrated temperature sensor | 12-bit output updated every 8 ms - provides real-time thermal compensation without external components. |
| I²C address flexibility | 16 hardware-selectable + 127 EEPROM-programmable addresses - supports up to 143 devices on single bus in complex sensor arrays. |
| Back-bias magnet support | Z-axis gain reduction option (JOY variant only) - enables springless joystick return-to-zero using passive magnets instead of mechanical springs. |
| On-chip charge pump | Enables EEPROM writes at 2.8–3.5 V - removes need for external high-voltage programming circuitry. |
Applications
| Joystick Position Sensing | Linear Slide Detection |
|---|---|
Use Scenario: Thumb-operated 2D joystick in handheld gaming controller or medical diagnostic interface. IC Role / Device Role / Timing Role: ALS31300EEJALU-1000 measures X/Y Hall voltage shifts from magnet displacement; Z axis monitors button press force. Use Value: Eliminates potentiometers and mechanical switches, reducing wear-out failure and enabling sealed IP67 enclosure design. |
Use Scenario: Linear position feedback for drawer or door latch in smart appliance or office furniture. IC Role / Device Role / Timing Role: ALS31300EEJALU-1000 detects magnet proximity during slide-by motion along fixed track; outputs calibrated 12-bit position value via I²C. Use Value: Achieves ±0.2 mm repeatability without contact, avoiding dust-induced drift seen in optical encoders. |
| Rotation Angle Measurement | Low-Power Wearable Sensor |
Use Scenario: Rotary knob on industrial HMI panel requiring absolute angular position with no detents or stops. IC Role / Device Role / Timing Role: ALS31300EEJALU-1000 senses rotating magnet's 3D field vector; firmware computes angle via arctan(Y/X) with temperature-compensated offsets. Use Value: Delivers 0.1° resolution over 360° without gear trains or optical slits-reducing BOM count by 4 components vs. incremental encoder solution. |
Use Scenario: Battery-powered posture monitor worn on back or shoulder for ergonomic feedback. IC Role / Device Role / Timing Role: ALS31300EEJALU-1000 operates in LPDCM (12 µA avg) with 100 ms update interval; wakes host MCU only on tilt-triggered INT event. Use Value: Extends CR2032 coin cell life beyond 2 years while maintaining real-time orientation awareness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3D Hall-effect position sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis MLX90393ELD-ABA-000-TU | Tri-axis Hall sensor with SPI/I²C dual interface; ±2000 G range; 16-bit output; 2.2 µA sleep current. | Higher resolution and lower sleep current, but lacks integrated temperature sensor and EEPROM programmability. | Select when higher precision and ultra-low-power wake-on-event are critical; avoid if EEPROM storage or temp compensation is required. |
| TDK TMR2003D-1000 | Tunnel magnetoresistance (TMR) sensor; ±1000 G range; 16-bit output; 1.5 µA sleep current; no integrated temp sensor or EEPROM. | Superior noise performance (0.05 mG RMS) and faster response, but requires external temperature compensation and configuration memory. | Select for high-accuracy angular measurement in stable thermal environments; avoid when system-level calibration overhead must be minimized. |
Compared with MLX90393ELD-ABA-000-TU and TMR2003D-1000, the ALS31300EEJALU-1000 uniquely combines factory-trimmed ±1% sensitivity, on-chip temperature sensing, 78-bit user EEPROM, and configurable LPDCM-all in a 3 mm × 3 mm DFN-making it optimal for cost-sensitive, space-constrained industrial and consumer motion interfaces where self-contained calibration and thermal compensation are essential.
Availability
ALS31300EEJALU-1000 is available at Aetrix Electronics and suitable for joystick position sensing, linear slide detection, and rotation angle measurement requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for ALS31300EEJALU-1000 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Allegro MicroSystems designs high-performance magnetic sensing and power ICs for automotive, industrial, and consumer applications, with core expertise in Hall-effect technology and signal-conditioning ASICs.
The ALS31300 product line delivers integrated 3D linear Hall sensors with advanced low-power management and I²C output, targeting compact, battery-efficient human-interface and motion-sensing systems where reliability and factory-calibrated accuracy are mandatory.
FAQ
What is the full-scale magnetic sensing range of the ALS31300EEJALU-1000?
The ALS31300EEJALU-1000 is factory-configured for ±1000 G full-scale range on X and Y axes, with corresponding 2 LSB/G sensitivity. This range is optimized for common NdFeB magnet geometries used in joysticks, sliders, and rotary knobs. The Z-axis range remains ±1000 G unless configured for JOY mode, which is not applicable to the ALS31300EEJALU-1000 variant.
How does the ALS31300EEJALU-1000 achieve 14 nA sleep current?
The ALS31300EEJALU-1000 achieves 14 nA typical sleep current by disabling all Hall element biasing, ADC conversion, and digital logic except the I²C slave interface. In Sleep mode (Sleep=1), the device retains I²C address recognition and responds to START conditions but halts magnetic and temperature data acquisition until explicitly woken by a command or reset.
Can the ALS31300EEJALU-1000 be used with 1.8 V I²C systems?
Yes, the ALS31300EEJALU-1000 supports 1.8 V I²C compatibility via the I2C Threshold bit (bit 9 in EEPROM address 0x02). When set to '1', logic thresholds shift to VI(L) ≤ 0.54 V and VI(H) ≥ 1.26 V, enabling interoperability with 1.8 V microcontrollers while maintaining full 1 MHz Fast Mode+ timing compliance.
Does the ALS31300EEJALU-1000 include an integrated temperature sensor?
Yes, the ALS31300EEJALU-1000 integrates a 12-bit temperature sensor with output accessible via registers 0x28 (MSBs) and 0x29 (LSBs). Temperature data updates every 8 ms in Active mode and once per 10 low-power cycles in LPDCM, enabling real-time thermal compensation of magnetic readings without external components.
What is the purpose of the 78 bits of user EEPROM in the ALS31300EEJALU-1000?
The 78 bits of user EEPROM in the ALS31300EEJALU-1000 provide non-volatile storage for system-specific data such as calibration offsets, device serial numbers, manufacturing date codes, or custom configuration flags. It is accessible via I²C after entering customer access mode and supports up to 1000 write cycles with on-chip charge pump programming.
ALS31300EEJALU-1000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- X, Y, Z
- Output Type:
- I2C
- Sensing Range:
- -
- Voltage - Supply:
- 2.65V ~ 3.5V
- Current - Supply (Max):
- 6.7mA
- Current - Output (Max):
- -
- Resolution:
- 12 b
- Bandwidth:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Supplier Device Package:
- 10-DFN (3x3)
- Mounting Type:
- Surface Mount
ALS31300EEJALU-1000 FAQ
1.How can I place an order for ALS31300EEJALU-1000 through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS31300EEJALU-1000 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ALS31300EEJALU-1000 reliable?
The price and inventory of ALS31300EEJALU-1000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS31300EEJALU-1000 is usually 5 days.
3.What payment methods are accepted for ALS31300EEJALU-1000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS31300EEJALU-1000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS31300EEJALU-1000?
ALS31300EEJALU-1000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS31300EEJALU-1000 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ALS31300EEJALU-1000?
For technical support, including ALS31300EEJALU-1000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS31300EEJALU-1000 requirements.
6.How does Aetrix verify that ALS31300EEJALU-1000 is sourced from the original manufacturer or authorized distributors?
All ALS31300EEJALU-1000 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ALS31300EEJALU-1000 meets industry standards.
7.What is the process for return or replacement of ALS31300EEJALU-1000?
All ALS31300EEJALU-1000 units undergo pre-shipment inspection (PSI). If there is an issue with ALS31300EEJALU-1000, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ALS31300EEJALU-1000 part is unused and in its original packaging.
Return procedure for ALS31300EEJALU-1000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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