Allegro MicroSystems ATS17501 Dual Output Sensor ICs
Allegro MicroSystems ATS17501 Dual Output Differential Speed and Direction Sensor ICs are designed for rotational position sensing of a ferrous gear target found in automotive and industrial electric motor applications (often with specific application and safety requirements). The ATS17501 Sensor IC solution is housed in an SG package that incorporates a rare-earth magnetic pellet for ease of manufacturing, consistent application performance over temperature, and enhanced reliability.
The device incorporates three Hall elements to create two independent differential channels. Digital circuits process these inputs, and robust algorithms are developed to eliminate the detrimental effects of magnetic and system offsets and address false output transitions caused by target vibrations in electric motors at startup and low-speed operation. The differential signals are used to produce a highly accurate speed output and, if desired, provide information on the direction of rotation.
Advanced calibration techniques are used to optimize signal offset and amplitude. This calibration, combined with the digital tracking of the signal, results in accurate switch points over air gap, speed, and temperature.
The Allegro MicroSystems ATS17501 ICs are programmed for various applications requiring dual-phase gear speed and position signal information or simultaneous high-resolution gear speed and direction information. The device can be configured to enable Fault Detection mode for ASIL B(D) utilization.
The ATS17501 SG package is a lead (Pb) free 4-pin SIP package with an integrated back-biasing magnet and a 100% matte-tin-plated lead frame.
Features
- High-speed switching bandwidth up to 40kHz
- Two independent output channels with options for high-resolution XOR speed, pulse, and direction protocol
- ASIL B(D) compliant (ISO 26262)
- Optional fault detection output protocol
- Immune to common external magnetic disturbance
- EEPROM enables factory traceability throughout the product life cycle
Associated Products
Allegro MicroSystems Special Purpose & E-Motor Speed Sensor ICs
Offers an extensive portfolio of optimized solutions for many non-automotive applications.
Allegro MicroSystems Magnetic Speed Sensor ICs
A comprehensive portfolio covering the full range of speed and speed with direction sensor ICs.
Functional Block Diagram
Typical Application Circuit
Pinout
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