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A1333 Hall-Effect Angle Sensor IC

Allegro MicroSystems

A1333: Precision, High Speed, Hall-Effect Angle Sensor IC with Integrated Diagnostics for Safety-Critical Applications

The A1333 is a 360° angle sensor IC that provides contactless, low latency, high-resolution angular position information based on magnetic Circular Vertical Hall (CVH) technology. It has a system-onchip (SoC) architecture that includes: a CVH front end, digital signal processing, and motor commutation (UVW) or encoder outputs (A, B, I). It also includes on-chip EEPROM technology, capable of supporting up to 100 read/write cycles, for flexible end-of-line programming of calibration parameters.
The A1333 is ideal for automotive applications requiring 0° to 360° angle measurements, such as electronic power steering (EPS), rotary PRNDLs, and throttle systems.
The A1333 supports customer integration into safety-critical applications.
The A1333 is available in a dual-die 24-pin eTSSOP and a single-die 14-pin TSSOP package. The packages are lead (Pb) free with 100% matte-tin leadframe plating.
A1333 was developed in accordance with ISO 26262:2011 as a hardware safety element out of context. The single die was designed to meet ASIL B capability (pending assessment), and the dual die was designed to meet ASIL D capability (pending assessment), for use in automotive safety-related systems when integrated and used in the manner prescribed in the applicable safety manual and datasheet.

Product Number: A1333

Class: Sensors, Transducers Position Sensors Angle, Linear Position Measuring

Tag: 360° angle sensor IC, Hall-Effect Angle Sensor IC, High Speed position Sensor

Contactless 0° to 360° angle sensor IC, for angular position, rotational speed, and direction measurement
• Capable of sensing magnet rotational speeds targeting 12b effective resolution with 900 G field.
• Circular Vertical Hall (CVH) technology provides a single channel sensor system supporting operation across a wide range of air gaps.
Developed in accordance with ISO 26262:2011 requirements for hardware product development for use in safety-critical applications (pending assessment)
High diagnostic coverage
• On-chip diagnostics include logic built-in self-test (LBIST), signal path diagnostics, and watchdogs to support safety-critical applications.
• 4-bit CRC on SPI.
On-chip EEPROM for storing factory and customer calibration parameters
• Single-bit error correction, dual-bit error detection through the use of error correction control (ECC).
Supports harsh operating conditions required for automotive and industrial applications, including direct connection to 12 V battery
• Operating temperature range from –40°C to 150°C.
• Operating supply voltage range from 4.0 to 16.5V. Can support ISO 7637-2 Pulse 5b up to 39V.
Multiple output formats supported for ease of system integration
• ABI/UVW output provides high resolution, low latency, and PWM for initial position.
• 10 MHz SPI for low latency angle and diagnostic information; enables multiple independent ICs to be connected to the same bus.
• Output resolution on ABI and UVW are selectable.
Multiple programming / configuration formats supported
• The system can be completely controlled and programmed over SPI, including EEPROM writes.
• For system with limited pins available, writing and reading can be performed over VCC and PWM pins. This allows configuring the EEPROM in production line for a device with only.

Part Number Output Output Signal Rotation Angle Mounting Type Termination Style Actuator Type Operating Supply Current Moisture Sensitive Operating Temperature Voltage - Supply Package Type
A1333 PWM, SPI Programmable 0° ~ 360°, Continuous Surface Mount Gull Wing External Magnet, Not Included 17 mA Yes -40 °C ~ 150 °C(TA) 4V ~ 16.5V 24-pin eTSSOP (Suffix LP) / 14-pin TSSOP (Suffix LE)

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    Datasheet Download on Apr, 2022

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