ALLEGRO A1333LLETR-T

The A1333 is a 360° angle sensor IC that provides contactless 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.

• 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 requirements for hardware product development for use in safetycritical applications
• Single die version designed to meet ASIL B requirements when integrated and used in conjunction with the appropriate system-level control, in the manner prescribed in the A1333 Safety Manual
• Dual die version designed to meet ASIL D requirements when integrated and used in conjunction with the appropriate system-level control, in the manner prescribed in the A1333 Safety Manual
• Supports harsh operating conditions required for automotive and industrial applications, including direct connection to 12 V battery
• Operating temperature range from -40℃ to 150℃
• Operating supply voltage range from 4.0 to 16.5 V
• Can support ISO 7637-2 Pulse 5b up to 39 V
• 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 ABI/UVW and PWM pins connected.
• Stacked dual die construction to improve die-to-die matching for systems that require redundant sensors
• Reduces magnet misalignment impact on die-to-die matching for a given magnet diameter, relative to “side-by-side” dual die orientation

• automotive applications requiring 0° to 360° angle measurements, such as electronic power steering (EPS), rotary PRNDLs, and throttle systems
• safety-critical applications