A1180, A1181, A1182, and A1183: Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall-Effect Switches

This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change: October 31, 2011.

Recommended Substitutions: For existing customer transition, and for new customers or new applications, refer to the following parts:

  • for the A1180LUA-T use the A1190LUA-T
  • for the A1182EUA-T and the A1182LUA-T use the A1192LUA-T
  • for the A1182ELHLT-T and the A1182LLHLT-T use the A1192LLHLX-T
  • for the A1183EUA-T and the A1183LUA-T use the A1193LUA-T
  • for the A1183ELHLT-T and the A1183LLHLT-T use the A1193LLHLX-T

The A1180, A1181, A1182, and A1183 devices are sensitive, two-wire, unipolar, Hall-effect switches. The operate point, BOP, can be field-programmed, after final packaging of the sensor and placement into the application. This advanced feature allows the optimization of the sensor switching performance, by effectively accounting for variations caused by mounting tolerances for the device and the target magnet.

This family of devices are produced on the Allegro MicroSystems advanced BiCMOS wafer fabrication process, which implements a patented, high-frequency, chopper-stabilization technique that achieves magnetic stability and eliminates the offsets that are inherent in single-element devices exposed to harsh application environments. Commonly found in a number of automotive applications, the A1180-83 family of devices are utilized to sense: seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position.

Two-wire unipolar switches are particularly advantageous in price-sensitive applications, because they require one less wire than the more traditional open-collector output switches. Additionally, the system designer gains inherent diagnostics because output current normally flows in either of two narrowly-specified ranges. Any output current level outside of these two ranges is a fault condition. The A1180-83 family of devices also features on-chip transient protection, and a Zener clamp to protect against overvoltage conditions on the supply line.

The output currents of the A1181 and A1183 switch HIGH in the presence of a south polarity magnetic field of sufficient strength; and switch LOW otherwise, including when there is no significant magnetic field present. The A1180 and A1182 have inverted output current levels: switching LOW in the presence of a south polarity magnetic field of sufficient strength, and HIGH otherwise. The devices also differ in their specified LOW current supply levels.

Both devices are offered in two package styles: LH, a SOT-23W miniature low-profile package for surface-mount applications, and UA, a three-lead ultramini Single Inline Package (SIP) for through-hole mounting. Each package is available in a lead (Pb) free version (suffix, –T) with 100% matte tin plated leadframe.

Also see: A1184, A1185, and A1186.

Factory-programmed versions are also available. Refer to: A1140, A1142, and A1143.

Part numbers A1180ELHLT-T, A1180EUA-T, A1180LLHLT-T, A1180LUA-T, A1181ELHLT-T, A1181EUA-T, A1181LLHLT-T, and A1181LUA-T are available only in limited distribution. Interested customers should contact the appropriate sales person or field application engineer for more information on availability.

SAMPLE & BUY

Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
141 John Street, Suite 300
Babylon, NY 11702
Phone: (631)422-2500
Fax: (631)422-2504
Web: www.astrorepinc.com
Email: donna.tweedy@astrorepinc.com

If this is not your local representative, find your local sales rep here.

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  • Features and BenefitsFeatures and Benefits
  • PackagingPackaging
  • Technical DocsTechnical Docs
  • NewsNews
  • Chopper stabilization
    • Low switchpoint drift over operating temperature range
    • Low stress sensitivity
  • Field-programmable for optimized switchpoints
  • On-chip protection
    • Supply transient protection
    • Reverse-battery protection
    • On-board voltage regulator
    • 3.5 to 24 V operation

A1180, A1181, A1182, and A1183 devices are offered in two package styles: LH, a SOT-23W miniature low-profile package for surface-mount applications, and UA, a three-lead ultramini Single Inline Package (SIP) for through-hole mounting. Each package is available in a lead (Pb) free version (suffix, –T) with 100% matte tin plated leadframe.

UA/LH Combination

There are no news items available for this product.

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Functional Block Diagram

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
A1180ELHLT-T 3-lead SOT -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check Stock
A1182ELHLT-T 3-lead SOT -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check Stock
A1182EUA-T 3-lead SIP -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check Stock
A1182LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Discontinued Contact your
local sales rep
Check Stock
A1182LUA-T 3-lead SIP -40°C to 150°C Yes View Data Discontinued Contact your
local sales rep
Check Stock
A1183ELHLT-T 3-lead SOT -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check Stock
A1183EUA-T 3-lead SIP -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check Stock
A1183LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Discontinued Contact your
local sales rep
Check Stock
A1183LUA-T 3-lead SIP -40°C to 150°C Yes View Data Discontinued Contact your
local sales rep
Check 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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