Hall-Effect Angle Sensor ICs for Motor Position Applications:

Hall-Effect Angle Sensor ICs for Motor Position Applications:

The A1331 and A1334 from Allegro MicroSystems Europe are a family of contactless, Hall-effect based magnetic sensor ICs for high-speed motor position sensing in safety-critical automotive applications. Allegro’s dual-die A1331 and A1334 angle sensor ICs are based on vertical Hall-effect technology with system-on-chip architecture that provides fast output refresh rates and low signal path latency.

Each device is offered in a TSSOP-24 package that contains two individually sawn, electrically isolated silicon ICs. The dual-die feature makes them suitable for use in safety-critical applications that require the use of redundant sensor ICs, especially in ASIL compliant automotive systems. The A1334 is also offered in a single die configura-tion in the TSSOP-14 package for applications that do not require redundancy.

Typical applications include electronic power steering or power braking motor position sensing, transmission actuator position sensing, throttle/pedal position detection, and other systems that require ac-curate measurement of angular or rotary position.

The A1331 and A1334, with their onboard digital signal processing functions and EEPROM for factory and customer programmability, are designed specifically for on-axis/end-of-shaft angle sensing applications that require ultra-fast output refresh rates and low signal path latency.

These sensor ICs include a 4-wire 10 MHz SPI interface with a 25 µs output refresh rate and a nominal signal path latency of only 60 µs. In addition, the ICs can operate directly off a vehicle battery, supporting a wide 4.5-14.5 V supply voltage range while consuming just 10 mA (maximum) of supply current per silicon die. They also include signal path and I/O diagnostics designed to meet the stringent needs of ASIL safety requirements.

More information: Allegro MicroSystems