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A1227 Datasheet Hall-effect Latch

Manufacturer: Allegro MicroSystems

Overview: A1225, A1227, and A1229 Hall-Effect Latch for High Temperature.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

These Hall-effect latches are extremely temperature-stable and stress resistant sensor ICs especially suited for operation over extended temperature ranges to 150°C.

Superior hightemperature performance is made possible through a novel Schmitt trigger circuit that maintains operate and release point symmetry by compensating for temperature changes in the Hall element.Additionally, internal compensation provides magnetic switchpoints that become more sensitive with temperature, hence offsetting the usual degradation of the magnetic field with temperature.

The symmetry capability makes these devices ideal for use in pulse-counting applications where duty cycle is an important parameter.

Key Features

  • Symmetrical switchpoints.
  • Superior temperature stability.
  • Operation from unregulated supply.
  • Open-drain 25 mA output.
  • Reverse battery protection.
  • Activate with small, commercially available permanent magnets.
  • Solid-state reliability.
  • Small size.
  • Resistant to physical stress.
  • Enhanced ESD structures result in 8 kV HBM ESD performance without external protection components.
  • Internal protection circuits enable 40 V load dump compliance without.

A1227 Distributor

More Datasheets from Allegro MicroSystems

Part Number Description
A1225 Hall-Effect Latch
A1229 Hall-Effect Latch
A1201 Continuous-Time Bipolar Switch
A1205 Continuous-Time Bipolar Switch
A1242 Two-Wire Chopper-Stabilized Hall Effect Latch
A1244 Two Wire Hall-Effect Latch
A1245 Two Wire Hall-Effect Latch
A1260 Chopper Stabilized Precision Vertical Hall-Effect