Allegro ATS642LSH Two-Wire True Zero Speed Sensor Datasheet

The ATS642LSH is an optimized Hall effect sensing integrated circuit and magnet combination that provides a user-friendly solution for true zero-speed digital gear-tooth sensing in two-wire applications. The sensor consists of a single-shot molded plastic package that includes a samarium cobalt magnet, a pole piece, and a Hall effect IC that has been optimized to the magnetic circuit. This small package, with optimized two-wire leadframe, can be easily assembled and used in conjunction with a wide variety of gear shapes and sizes. The integrated circuit incorporates a dual element Hall effect sensor and signal processing engine, which provides high-precision, reliable gear tooth sensing.


Allegro ATS642LSH Two-Wire True Zero Speed Sensor Datasheet - cover page
Brand
Allegro
Category
Other Electronics
Document type
Datasheet
Language
English
Pages
16
File format
PDF
File size
428 KB
Published
11 July, 2012
Updated
30 September, 2023
MD5 checksum
93EA2108C9FE854E9EC61EB9B5F156CA

About this manual

The ATS642LSH is an optimized Hall effect sensing integrated circuit and magnet combination designed for true zero-speed digital gear-tooth sensing in two-wire applications. It features running mode calibration, automatic gain control (AGC), and automatic offset adjustment (AOA) to ensure immunity to environmental effects such as micro-oscillations or sudden air gap changes.

The sensor is packaged in a small 8 mm diameter x 5.5 mm depth lead-free module with 100% matte tin plating. It incorporates a dual element Hall effect sensor and signal processing circuitry optimized for fine pitch gear-tooth-based configurations, making it ideal for obtaining speed and duty cycle information in anti-lock braking systems (ABS).

What's inside

  • Features and Benefits
  • Absolute Maximum Ratings
  • Functional Block Diagram
  • Operating Characteristics
  • Reference Target Specifications
  • Characteristic Data Graphs

Specifications

Operating Temperature Range-65°C to +170°C
Package Dimensions8 mm diameter x 5.5 mm depth
Operating Air Gap Range0.5 - 2.75 mm
Maximum Operational Air Gap3 mm

Frequently asked questions

What is the primary application for this sensor?

The sensor is ideally suited for obtaining speed and duty cycle information in ABS (antilock braking systems).

Is the sensor package lead-free?

Yes, the package is lead (Pb) free with 100% matte tin leadframe plating.

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