Allegro MicroSystems Inc. Chopper-Stabilized, Two-Wire Hall-Effect Switch A1150LLHLT-T

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Chopper-Stabilized, Two-Wire Hall-Effect Switch - A1150LLHLT-T - Allegro MicroSystems Inc.
Manchester, NH, United States
Chopper-Stabilized, Two-Wire Hall-Effect Switch A1150LLHLT-T
Description Allegro MicroSystems recommends APS11500 for all new Automotive 2-wire Hall-Effect switch IC designs. The A1150, A1152, A1153, A1155, A1156, A1157, and A1158 comprise a family of two-wire, unipolar, Hall-effect switches, which are factory-trimmed to optimize magnetic switchpoint accuracy. These devices are produced on the Allegro™ advanced BiCMOS wafer fabrication process, which implements a patented high frequency, 4-phase, chopper-stabilizatio n technique. This technique achieves magnetic stability over the full operating temperature range, and eliminates offsets inherent in devices with a single Hall element that are exposed to harsh application environments. The A115x family has a number of automotive applications. These include sensing seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position. Two-wire unipolar switches are particularly advantageous in cost-sensitive applications because they require one less wire for operation versus the more traditional open-collector output switches. Additionally, the system designer inherently gains diagnostics because there is always output current flowing, which should be in either of two narrow ranges. Any current level not within these ranges indicates a fault condition. All family members are offered in three package styles. The LH is a SOT-23W style, miniature, low profile package for surface-mount applications. The UA is a 3-pin, ultra-mini, single inline package (SIP) for through-hole mounting. The UB is a 2-pin, ultra-mini, single inline package (SIP) for through-hole mounting. All three packages are lead (Pb) free, with 100% matte tin leadframe plating. Top Features AEC-Q100 automotive qualified High-speed, 4-phase chopper stabilization Low switchpoint drift throughout temperature range Low sensitivity to thermal and mechanical stresses On-chip protection Supply transient protection Reverse-battery protection On-board voltage regulator 3 to 24 V operation Solid-state reliability Robust EMC and ESD performance Industry-leading ISO 7637-2 performance through use of proprietary, 40-V clamping structures Extended Operating Ambient temperature range, -40°C to 150°C UB package option with integrated 0.1 µF bypass capacitor -F option: Factory set temperature coefficient (TC) for use with ferrite magnets EXPAND ×

Description

Allegro MicroSystems recommends APS11500 for all new Automotive 2-wire Hall-Effect switch IC designs.

The A1150, A1152, A1153, A1155, A1156, A1157, and A1158 comprise a family of two-wire, unipolar, Hall-effect switches, which are factory-trimmed to optimize magnetic switchpoint accuracy. These devices are produced on the Allegro™ advanced BiCMOS wafer fabrication process, which implements a patented high frequency, 4-phase, chopper-stabilization technique. This technique achieves magnetic stability over the full operating temperature range, and eliminates offsets inherent in devices with a single Hall element that are exposed to harsh application environments.

The A115x family has a number of automotive applications. These include sensing seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position.

Two-wire unipolar switches are particularly advantageous in cost-sensitive applications because they require one less wire for operation versus the more traditional open-collector output switches. Additionally, the system designer inherently gains diagnostics because there is always output current flowing, which should be in either of two narrow ranges. Any current level not within these ranges indicates a fault condition.

All family members are offered in three package styles. The LH is a SOT-23W style, miniature, low profile package for surface-mount applications. The UA is a 3-pin, ultra-mini, single inline package (SIP) for through-hole mounting. The UB is a 2-pin, ultra-mini, single inline package (SIP) for through-hole mounting. All three packages are lead (Pb) free, with 100% matte tin leadframe plating.


Top Features

  • AEC-Q100 automotive qualified
  • High-speed, 4-phase chopper stabilization
  • Low switchpoint drift throughout temperature range
  • Low sensitivity to thermal and mechanical stresses
  • On-chip protection
    • Supply transient protection
    • Reverse-battery protection
    • On-board voltage regulator
    • 3 to 24 V operation
  • Solid-state reliability
  • Robust EMC and ESD performance
  • Industry-leading ISO 7637-2 performance through use of proprietary, 40-V clamping structures
  • Extended Operating Ambient temperature range, -40°C to 150°C
  • UB package option with integrated 0.1 µF bypass capacitor
  • -F option: Factory set temperature coefficient (TC) for use with
    ferrite magnets

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Technical Specifications

  Allegro MicroSystems Inc.
Product Category Proximity Sensors
Product Number A1150LLHLT-T
Product Name Chopper-Stabilized, Two-Wire Hall-Effect Switch
Sensor Technology Hall Effect Proximity Sensor
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