Allegro ATS645LSH True Zero Speed Miniature Gear Tooth Sensor Preliminary Datasheet

ATS645LSH is a miniature gear tooth sensor from ATMEL that provides true zero-speed digital gear-tooth sensing in two-wire applications.


Allegro ATS645LSH True Zero Speed Miniature Gear Tooth Sensor Preliminary Datasheet - cover page
Brand
Allegro
Category
Other Electronics
Document type
Datasheet
Language
English
Pages
12
File format
PDF
File size
320 KB
Published
11 July, 2012
Updated
30 September, 2023
MD5 checksum
5DE40A9AD36EEA98BABDB92DB3A5457D

About this manual

The ATS645LSH is an optimized Hall effect sensing integrated circuit and magnet combination designed 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 optimized to the magnetic circuit. It is ideally suited for obtaining speed and duty cycle in ABS and transmission application gear-tooth-based configurations.

What's inside

  • Features
  • Absolute Maximum Ratings
  • Electrical Characteristics
  • Operating Characteristics
  • Reference Gear Parameters
  • Typical Operating Characteristics
  • Sensor Description
  • Transient Performance

Specifications

Supply Voltage4.0 to 24 V
Operating Temperature Range-40 °C to 150 °C
Package Power Rating126 °C/W
Maximum Junction Temperature165 °C
Mechanical Size8 mm dia x 5.5 mm length
Analog Signal Bandwidth20 to 40 KHz
Operating Air Gap Range0.5 to 2.75 mm

Frequently asked questions

What is the primary application for the ATS645LSH?

The sensor is ideally suited for obtaining speed and duty cycle in ABS and transmission application gear-tooth-based configurations.

Does the ATS645LSH support true zero speed operation?

Yes, the circuitry contains a sophisticated digital circuit to eliminate magnet and system offsets and to achieve true zero speed operation.

Is the ATS645LSH designed for two-wire applications?

Yes, the regulated current output is configured for two wire applications.

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