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A3144 Hall Effect Sensor Switch

E1010

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Hall Effect Sensor A3144 Sensitive Switch

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These Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate continuously over extended temperatures to +150°C, and are more stable with both temperature and supply voltage changes. The unipolar switching characteristic makes these devices ideal for use with a simple bar or rod magnet. The four basic devices (3141, 3142, 3143, and 3144) are identical except for magnetic switch points.

Each device includes a voltage regulator for operation with supply voltages of 4.5 to 24 volts, reverse battery protection diode, quadratic Hall-voltage generator, temperature compensation circuitry, small signal amplifier, Schmitt trigger, and an open-collector output to sink up to 25 mA. With suitable output pull up, they can be used with bipolar or CMOS logic circuits. The A3141– and A3142– are improved replacements for the UGN/UGS3140–; the A3144– is the improved replacement for the UGN/UGS3120–.

The first character of the part number suffix determines the device operating temperature range. Suffix ‘E–’ is for the automotive and industrial temperature range of -40°C to +85°C. Suffix ‘L–’ is for the automotive and military temperature range of -40°C to +150°C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT89/TO-243AA transistor package for surface-mount applications; suffix ‘–UA’ is a three-lead ultra-mini-SIP.

Features

  • Superior Temp. Stability for Automotive or Industrial Applications
  • 4.5 V to 24 V Operation … Needs Only An Unregulated Supply
  • Open-Collector 25 mA Output … Compatible with Digital Logic
  • Reverse Battery Protection
  • Activate with Small, Commercially Available Permanent Magnets
  • Activate with Small, Commercially Available Permanent Magnets
  • Small Size
  • Resistant to Physical Stress

Applications

  • Speed measurement
  • Home appliances
  • Poison detection
  • Flow measurement

Absolute Maximum Ratings

  • Supply Voltage, VCC: 28V
  • Reverse Battery Voltage, VRCC: -35V
  • Magnetic Flux Density, B: Unlimited
  • Output OFF Voltage, VOUT: 28V
  • Reverse Output Voltage, VOUT: -0.5V
  • Continuous Output Current, IOUT: 25mA
  • Operating Temperature Range, TA Suffix ‘E–’: -40°C to +85°C
  • Operating Temperature Range, TA Suffix ‘L–’: -40°C to +150°C
  • Storage Temperature Range: -65°C to +170°C

Datasheet available for viewing at: 
http://www.allegromicro.com/~/media/Files/Datasheets/A3141-2-3-4-Datasheet.ashx

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A3144 Hall Effect Sensor Switch

A3144 Hall Effect Sensor Switch

Hall Effect Sensor A3144 Sensitive Switch

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