Product Overview
The A31316 is a robust 3D Hall-effect magnetic position sensor designed for on-axis and off-axis rotary as well as linear stroke position measurement. It integrates vertical and planar Hall-effect elements with precision temperature-compensation circuitry to detect magnetic field components. The sensor offers configurable signal processing, linearization, and angle calculation for accurate absolute position resolution. Available with PWM or SENT (SAE J2716) interfaces, it outputs angle or field measurements. On-chip EEPROM allows flexible programming and includes customer identification bits. Developed in accordance with ISO 26262 as a hardware safety element out of context (SEooC) with ASIL B capability, it features integrated diagnostics for high reliability in automotive, industrial, and consumer applications.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: ISO 26262 ASIL B capability (pending assessment)
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Sensor Type | 3D Hall-effect Magnetic Position Sensor | On-axis and off-axis rotary, linear stroke measurement |
| Magnetic Field Detection | Vertical and planar Hall-effect elements | Detects two out of three magnetic field components (X, Y, Z) |
| Output Interfaces | PWM, SENT (SAE J2716) | Configurable signal processing, linearization, and angle calculation |
| Angle Measurement | Absolute rotary (full 360 and short stroke <360), Linear | Up to 16-bit resolution |
| Programmability | On-chip EEPROM | Up to 100 write cycles |
| Diagnostics | Integrated IC diagnostics | Broken wire detection, Undervoltage Detection (UVD), Built-In Self-Test (BIST) |
| Operating Temperature Range | -40C to 150C | |
| Supply Voltage | 4.5 V to 5.5 V | |
| Supply Current | 5 mA (typical) | |
| Package | 3-PIN SIP (Suffix UC) | |
| Part Number Example | A31316LUCHTN-XZ-S-SE-10 | Temperature: -40C to 150C, Field Range: 300 to 1000 gauss, Channels: X, Z, Packing: 4,000 pieces per 13-in reel |
| Part Number Example | A31316LUCHTN-XY-S-SE-10 | Temperature: -40C to 150C, Field Range: 300 to 1000 gauss, Channels: X, Y, Packing: 4,000 pieces per 13-in reel |
| Part Number Example | A31316LUCHTN-YZ-S-SE-10 | Temperature: -40C to 150C, Field Range: 300 to 1000 gauss, Channels: Y, Z, Packing: 4,000 pieces per 13-in reel |
| Angle Error (XY, XZ, YZ) | 1 (typical at 25C) | 1.2 (typical over temperature range) |
| Channel Sensitivity Error (X,Y) | 1.5% (typical at 25C) | 3% (typical over temperature range) |
| Channel Sensitivity Error (Z) | 1.5% (typical at 25C) | 4% (typical over temperature range) |
| Channel Offset Error (X,Y) | 1.5 G (typical at 25C) | 4 G (typical over temperature range) |
| Channel Offset Error (Z) | 1.5 G (typical at 25C) | 2.5 G (typical over temperature range) |
| SENT Tick Time | 2.76 s to 3.24 s (nominal) | Selectable range: 0.25 s to 10 s |
| PWM Carrier Frequency | 125 Hz to 160000 Hz | Configurable |
2401220953_ALLEGRO-A31316LUCHTN-XZ-S-SE-10_C19761962.pdf
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