A33002 and A33003: Precision Magnetic Angle Sensor with Multiple Outputs

TheA33002 and A33003are 360° angle sensor ICs that provides contactless high-resolution angular position information based on magnetic circular vertical Hall (CVH) technology. They have a system-onchip (SoC) architecture that includes: a CVH front end, digital signal processing to calculate the angular position information, and selectable output protocols (SPI, SENT, or PWM). They also include on-chip EEPROM technology, capable of supporting up to 100 read/write cycles for flexible programming of calibration parameters. The A33002 and A33003 are ideal for automotive applications requiring 0° to 360° angle measurements and high levels of redundancy, such as electronic power steering (EPS), transmission actuators, and steer-by-wire (SBW) systems.

The A33002 and A33003 include on-chip 32-segment linearization. This can be used to calibrate out errors due to misalignment between the magnet and the sensor or imperfect magnetization of the target magnet (which can present itself as a misalignment of the magnet to the sensor).

The A33002 and A33003 support customer integration into safety-critical applications.

TheA33002is available in a single die or dual die 14-pin TSSOP package (suffix LE). The package is lead (Pb) free with 100% matte tin leadframe plating.

TheA33003is available in a single or dual die 14-pin TSSOP package (suffix LU). The package is lead (Pb) free with 100% matte-tin leadframe plating. The 1 mm thin package reduces the minimum air gap between the CVH transducer and the target magnet.

A33002和A33003利用曼彻斯特encoding to program the IC however while the A33002 requires pulses to be applied to the VCC pin (between 5V and 8V) , the A33003 is programmed through the Vout pin, without the need for elevated voltages. This feature is useful in systems with shared supply lines which cannot be disturbed during programming.

• Enhanced Manchester Interface(A33003)
• High diagnostic coverage
• Digital output format selectable between SPI, SENT, or PWM
• SENT output is SAEJ2716 JAN2010 compliant with Allegro proprietary enhancements
• Programmable via Manchester encoding on the output line to reduce external wiring and enable in-application programming when in PWM or SENT mode
• On-chip EEPROM for storing factory and customer calibration parameters
• Supports operation in harsh conditions, required for automotive and industrial applications
• Loss of power is indicated by reset flag
• 10 MHz SPI for low latency angle and diagnostic information; enables multiple independent ICs to be connected to the same bus
• Multiple programming / configuration formats supported