A119x and A119x-F: Programmable, Chopper-Stabilized, Two-Wire Hall-Effect Switches

Description

 Allegro MicroSystems recommends APS11900 for all new programmable Automotive 2-wire Hall-Effect switch IC designs.

The A119x and A119x-F comprise a family of two-wire, unipolar, Hall-effect switches, which can be trimmed by the user at end-of-line to optimize magnetic switchpoint accuracy in the application. The latter (-F option) are temperature compensated for use with ferrite magnets. 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 A119x and A119x-F 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 surfacemount applications. The UA is a 3-pin, ultra-mini, single inline package (SIP) for through-hole mounting. The UB is a 2-pin single inline package (SIP) for through-hole mounting that integrates the power supply decoupling capacitor. All three packages are lead (Pb) free, with 100% matte-tin leadframe plating.

Top Features

  • Choice of factory-set temperature coefficient (TC) for use with ferrite or rare-earth magnets
  • Field programmable for optimized switchpoints
  • AEC-Q100 automotive qualified
    • On-board voltage regulator: 3 to 24 V operation
  • 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
    • Industry-leading ISO 7637-2 performance through use of proprietary, 40 V clamping structure
  • Solid-state reliability
  • Robust EMC and ESD performance
  • UB package with integrated 0.1 μF bypass capacitor

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A1190LUB-T n/a -20°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1190LUBTN-T n/a -20°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1190LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1190LLHLX-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1190LUA-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1190LUBLU-T 2-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1192LUBLU-F-T 2-lead SIP -20°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1192LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1192LLHLU-F-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1192LLHLU-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1192LLHLX-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1192LUA-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1192LUBLU-T 2-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1193LUBLU-F-T n/a -20°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1193LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1193LLHLU-F-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1193LLHLU-T SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1193LLHLX-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1193LUA-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1193LUBLU-T SIP -40°C to 150°C Yes View Data 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.

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