Allegro MicroSystems A31316 3D Hall-Effect Magnetic Position Sensor IC
Allegro MicroSystems A31316 3D Hall-Effect Magnetic Position Sensor IC is designed for on-/off-axis rotary and linear stroke position measurement in automotive, industrial, and consumer applications. The robust sensor IC integrates vertical and planar Hall-effect elements with precision temperature-compensation circuitry to detect two of three magnetic field components (X, Y, and Z). Configurable signal processing, linearization, and angle calculation allow the A31316 to accurately resolve the absolute rotary (full 360° and short stroke <360°) or linear position of a moving magnetic target.
PWM or SENT (SAE J2716) interface options output the angle between the two factory-selected axes or the field from a single axis. In addition, the SENT interface provides the option to output the field measurement from both channels. Integrated on-chip EEPROM technology enables flexible programming of the configuration and calibration parameters, including bits for customer device identification purposes.
The Allegro MicroSystems A31316 3D Hall-Effect Magnetic Position Sensor IC contains on-chip diagnostic features required for high-reliability automotive applications, including monitors of internal and external fault conditions. The sensor IC is developed in accordance with ISO 26262 as a hardware safety element out of context (SEooC) with ASIL B capability for use in automotive safety-related systems when integrated and used in the manner prescribed.
Features
- PCB-less “UC” package for system integration without a PCB
- Enables flexible mechanical integration for contactless linear and rotary position applications
- Configurable signal path processing and on-chip angle calculation for accurate 360° and short stroke (<360°) rotary applications
- Multiple programmable linearization options for maximum measurement accuracy
- Piecewise-linear and binning modes
- Up to 33-point fixed position
- Up to 22-point programmable positions
- PWM and SENT (SAE J2716) output formats
- Integrated IC diagnostics for high reliability
- Broken wire detection
- 5V operation with Undervoltage Detection (UVD)
- Built-In Self-Test (BIST) diagnostic capability
- Wide -40°C to +150°C operating temperature range
- In-package passives remove the need for external support circuitry
- Supports SENT (SAE J2716) and PWM interface options
- Developed in accordance with ISO 26262 as a hardware safety element out of context (SEooC) with ASIL B
- AEC-Q100 Grade 0 qualified supports operation in harsh conditions, required for automotive and industrial applications
Applications
- Automotive
- Industrial
- Consumer
Specifications
- 4.5V to 6V supply voltage range
- 0 to 500nF supply buffer capacitor range
- 5mA to 10mA supply current range
- 100 maximum EEPROM writes
- ±300G typical magnetic flux density, ±1000G maximum
- 1ms typical power-on time, 1.70ms maximum
- 7.36MHz to 8.64MHz oscillator frequency range
- 19mA to 30mA output current limit, ±30mA maximum
- Temperature ranges
- -40°C to +150°C operating ambient
- -45°C to +165°C extended operating ambient
- +270LC/W thermal reistance
Block Diagram
Related Products
Allegro MicroSystems 3D Magnetic Position Sensor ICs
Unparalleled design flexibility for automotive, industrial, and consumer applications.
Associated Kit
Allegro MicroSystems ASEK31316-SUBKIT-T Kit
The kit facilitates an extensive evaluation of the A31316 sensor IC.