Hall-Effect Angle Sensor Addresses Safety Critical Auto Apps

Hall-Effect Angle Sensor Addresses Safety Critical Auto Apps
Allegro MicroSystems Inc.

The A1332 and A1334 contactless Hall magnetic sensors are based on magnetic circular vertical hall (CVH) technology to provide fast output refresh rates and low signal path latency. This enables the sensors to support a wide variety of demanding automotive and industrial applications, such as electronic power steering (EPS), transmission, motor position, throttle/pedal position, and other systems that require accurate measurement of angles. The A1332, with an onboard 32-bit processor and EEPROM for factory and customer programmability, includes Segmented and Fourier linearization functions for supporting challenging off-axis/side-shaft magnetic sensing configurations that are commonly found in electronic power steering and transmission applications. It also supports on-axis/end-of-shaft magnetic sensing configurations and can produce high accuracy angle measurements at output refresh rates of 32 µs. The device sports a two-wire I²C digital interface with signal path and I/O diagnostics for achieving higher ASIL safety reliability objectives. The A1334, with its onboard digital signal processing functions and EEPROM for factory and customer programmability, is designed for on-axis/end-of-shaft applications that require ultra-fast output refresh rates and low signal path latency. Its 4-wire 10 MHz SPI interface offers a 25 µs output refresh rate and a nominal signal path latency of only 60 µs. In addition, the A1334 can operate directly off a vehicle battery, supporting a wide 4.5 V to 14.5 V supply voltage range, while consuming just 10 mA (max) of supply current. Like the A1332, the A1334 also includes signal path and I/O diagnostics for achieving higher ASIL safety requirements.The A1332 is priced at $2.98 and the single die A1334 is priced at $2 each/1,000. Datasheets are available at
• (A1332) http://www.allegromicro.com/~/media/Files/Datasheets/A1332-Datasheet.ashx
• (A1334) http://www.allegromicro.com/~/media/Files/Datasheets/A1334-Datasheet.ashx

Allegro MicroSystems
Worcester, MA
508-853-5000
http://www.allegromicro.com

Contact Info

Company: Allegro MicroSystems Inc.
Country: United States (USA)
Phone number: 508-853-5000
Fax: 508-853-7895

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