A3161: Hall-Effect Switch for Two-Wire Applications

Description

These parts are discontinued.  Samples are no longer available. For new customers or new applications, please refer to Allegro A1150 Series.

This Hall-effect switch is a monolithic integrated circuit designed to operate continuously over extended temperatures to +85°C. The unipolar switching characteristic makes this device ideal for use with a simple bar or rod magnet. The A3161ELT and A3161EUA are identical except for package.

Each device includes a voltage regulator for operation with supply voltages of 3.5 to 25 volts, reverse battery protection diode, quadratic Hall-voltage generator, temperature compensation circuitry, small-signal amplifier, Schmitt trigger, and a constant-current open-collector output. Noise radiation is limited by control of the output current slew rate.

Top Features

  • Internal Current Regulator for 2-Wire Operation
  • Output Slew Rate Controlled
  • 3.5 V to 25 V Operation ... Needs Only An Unregulated Supply
  • Reverse Battery Protection
  • Excellent Temp. Stability
  • Activate with Small, Commercially Available Permanent Magnets
  • Small Size
  • Solid-State Reliability ... No Moving Parts
  • Resistant to Physical Stress

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A3161ELT 3-lead SOT -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check
Distributor Stock
A3161ELTTR 3-lead SOT -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check
Distributor Stock
A3161EUA 3-lead SIP -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.