The device has a system-on-chip (SoC) architecture with a front end based on circular vertical Hall technology and programmable microprocessor-based signal processing. It supports multiple communication interfaces including I²C, SPI (Serial Peripheral Interface), and SENT (Single Edge Nibble Transmission).
In addition to providing 360° angular measurement, the A1335 provides two options for on-chip linearisation: harmonic linearisation to handle applications that require side-shaft magnetic configurations; and segmented linearisation for scaling angle measurement applications requiring less than 360° of motion (so-called “short stroke” applications). It also includes on-chip EEPROM technology, capable of supporting up to 100 read/write cycles, for flexible programming of calibration parameters.
In addition to the advanced output linearisation algorithms, other digital signal processing functions include temperature compensation and gain/offset trim, helping to provide an accurate and linear output for both end-of-shaft applications and challenging off-axis or side-shaft applications.
The A1335 is intended for automotive applications requiring high-speed 360° angle measurements, such as electronic power steering, transmission, torsion bar, and other systems that require accurate measurement of angles. It comes as a single die in a 14-pin TSSOP package or dual dice in a 24-pin TSSOP package.
Allegro MicroSystems; www.allegromicro.com