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Position Sensor ICs

Allegro MicroSystems, LLC has developed a line of fully integrated Hall-effect digital position sensor ICs that detect changes in magnetic flux density, allowing them to distinguish movement and position. These contactless sensing solutions require few external components and can withstand the hostile operating conditions of automotive applications.

Hall-effect digital position sensor ICs detect changes in magnetic flux density, allowing them to distinguish movement and position. These contactless sensing solutions require few external components and can withstand the hostile operating conditions of automotive applications.

Specific advantages of Allegro’s solutions include:

  • 4x chopper-stabilization for offset cancellation provides: enhanced switch point stability that increases accuracy in measuring motor speed or duty cycle, and industry leading jitter performance that outperforms the competition
  • Low voltage (3 V) operation and lower ICC for more power efficient devices
  • Many standard products are designed to survive harsh automotive transient conditions, including double battery and 40 V load dump, without a limiting series resistor, which eliminates the need for external components and prevents transient voltage field failures

The majority of Allegro’s digital position sensing volume ships into demanding automotive applications, and has a proven quality record and dedication to continuous improvement.

Allegro offers a broad range of switching and latching solutions to cover just about any application need.

 

Buy NowA1120, A1121, A1122, and A1125

Chopper-Stabilized Precision Hall Effect Switches

Chopper-Stabilized Precision Hall Effect Switches
Part No. Package Type Temperature  
A1120 3-lead SOT
3-lead SIP
-40 ° C to 150 ° C Spec Sheet
A1121 -40 ° C to 150 ° C Spec Sheet
A1122 -40 ° C to 150 ° C Spec Sheet
A1125 -40 ° C to 150 ° C Spec Sheet

Features:

  • Unipolar switchpoints
  • Resistant to physical stress
  • Superior temperature stability
  • Output short-circuit protection
  • Operation from unregulated supply
  • Reverse battery protection
  • Solid-state reliability
  • Small package sizes

Buy NowA1220, A1221, A1222, and 1223

Chopper-Stabilized Precision Hall Effect Latches

Chopper-Stabilized Precision Hall Effect Latches
Part No. Package Type Temperature  
A1220 3-lead SOT
3-lead SIP
-40 ° C to 150 ° C Spec Sheet
A1221 -40 ° C to 150 ° C Spec Sheet
A1222 -40 ° C to 150 ° C Spec Sheet
A1223 -40 ° C to 150 ° C Spec Sheet

Features:

  • Symmetrical latch switchpoints
  • Resistant to physical stress
  • Superior temperature stability
  • Output short-circuit protection
  • Operation from unregulated supply down to 3 V
  • Reverse battery protection
  • Solid-state reliability
  • Small package sizes

Buy NowA1160

Unipolar Switch with Built-in Diagnostics

Unipolar Switch with Built-in Diagnostics
Part No. Package Type Temperature  
A1160    -40 ° C to 150 ° C Spec Sheet

Features:

  • Externally enabled diagnostics feature
  • Output short-circuit protection
  • Reverse battery protection
  • Small, surface mount package - 5-lead SOT-23W
  • Internal regulator enables operation from unregulated supplies
  • Diagnostics feature exercises the entire magnetic and electrical signal path within the IC
  • Superior temperature stability through advanced chopper stabilization techniques

Applications:

  • Automotive, Industrial and Consumer Applications
    • Shift selectors
    • Open/close detection
    • Simple speed sensing
    • Motor commutation

Technical Articles:

Position Sensing

General

Allegro MicroSystems