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A1642LK

Allegro MicroSystems
Part Number A1642LK
Manufacturer Allegro MicroSystems
Description Two-Wire True Zero-Speed Miniature Differential Peak-Detecting Sensor
Published Apr 24, 2007
Detailed Description A1642LK Two-Wire True Zero-Speed Miniature Differential Peak-Detecting Sensor with Continuous Calibration The A1642 is a...
Datasheet PDF File A1642LK PDF File

A1642LK
A1642LK

Overview
A1642LK Two-Wire True Zero-Speed Miniature Differential Peak-Detecting Sensor with Continuous Calibration The A1642 is an optimized Hall effect sensing integrated circuit that provides a user-friendly solution for true zero-speed digital ring-magnet sensing in two-wire applications.
This small package can be easily assembled and used in conjunction with a wide variety of target shapes and sizes.
The integrated circuit incorporates a dual-element Hall effect sensor and signal processing that switches in response to differential magnetic signals created by ring magnet poles.
The circuitry contains a sophisticated digital circuit to reduce system offsets, to calibrate the gain for air-gap–independent switchpoints, and to achieve true zero-speed operation.
Signal optimization occurs at power-on through the combination of offset and gain adjust and is maintained throughout the operating time with the use of a running-mode calibration.
The running-mode calibration allows immunity to environm...


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