Allegro MicroSystems A33023 Hall-Effect Angle Sensor ICs
Allegro MicroSystems A33023 Hall-Effect Angle Sensor ICs are 360° angle sensors that provide contactless, high-resolution angular position information via magnetic sensing. The A33023 has a system-on-chip (SoC) architecture that includes angle sensing, digital signal processing, and various output options: serial peripheral interface (SPI), pulse width modulation (PWM), motor commutation (U, V, W), and encoder outputs (A, B, I). Also integrated in the device is on-chip EEPROM technology capable of supporting a high number of read/write cycles, for flexible end-of-line programming of calibration parameters.
The low 25µs latency of the A33023 makes it ideal for automotive applications requiring fast 0° to 360° angle measurements, such as electronic power steering (EPS), seatbelt motor systems, transmission actuators, shift-by-wire systems, electronic braking systems, and throttle systems. The A33023 is targeting single-die ASIL D compliance when used in conjunction with appropriate system-level controls.
The Allegro MicroSystems A33023 also includes integrated linearization features. This feature allows the A33023 to correct for misalignment between the IC and the target magnet with minimal added latency. The A33023 is available in a single-die 14-pin TSSOP package and a dual-die 24-pin eTSSOP package. The packages are lead (Pb) free with 100% matte tin leadframe plating. The A33023 is qualified to AEC-Q100 grade 0.
Features
- Contactless 0° to 360° angle sensor IC, for angular position, rotational speed, and direction measurement
- Hall-effect technology
- End of shaft
- Stray field immune
- Designed to meet ASIL D top-level safety requirements in a single- or dual-die package when used in conjunction with appropriate system-level control
- 11.2-bits noise-free resolution with 300G field and 12.5kHz bandwidth
- Default 25µs latency with 12.5kHz bandwidth, programmable from 15µs to 45µs
- Wide operating voltage (3.7V to 18V) enables direct connection to the vehicle battery
- Linearization to reduce the error from misalignment between the sensor and the target magnet
- SPI interface allows the use of multiple independent sensors for applications requiring redundancy
- 5-bit cyclic redundancy check (CRC) on SPI messages
- ABI and UVW interfaces provide high resolution and the lowest latency angle information
- EEPROM with Error Correction Control (ECC) for trimming calibration
- EEPROM programmable angle reference (0°) position and rotation direction (CW or CCW)
- AEC-Q100 Grade 0 qualified
Applications
- Steer-by-wire
- Electrohydraulic
- Electromechanical
- Electronic power steering
- 2W-xEV power
Functional Block Diagram
Related Angle Sensor IC
Allegro MicroSystems CI de capteurs d’angle à effet Hall A33022
Provides contactless, high-resolution angular position information via magnetic sensing technology.
Development Tool
Allegro MicroSystems ASEK-30 Sensor Programmer
This programmer is an interface between a PC and an Allegro sensor IC.