A1147 and A1148: Low Current Ultrasensitive Two-Wire 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 A1147ELHLT-T and A1147LLHLT-T use the A1157LLHLX-T
for the A1147EUA-T and A1147LUA-T use the A1157LUA-T
for the A1148ELHLT-T and A1148LLHLT-T use the A1158LLHLX-T
for the A1148EUA-T and A1148LUA-T use the A1158LUA-T

The A1147 and A1148 devices are two-wire, unipolar, Hall-effect switches that are factory-programmed at end-of-line to optimize ultrasensitive magnetic switchpoint accuracy. These devices use a patented high frequency chopper-stabilization technique, produced using the Allegro advanced BiCMOS wafer fabrication process, to achieve magnetic stability and to eliminate offset inherent in single-element devices exposed to harsh application environments.

Commonly found in a number of automotive applications, these switches are utilized in sensing seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position. Two-wire unipolar switches, such as the A1147 and A1148, are particularly advantageous in price-sensitive applications because they require one less wire for operation than do switches with the more traditional open-collector output. 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. These devices also feature on-chip transient protection and a Zener clamp to protect against overvoltage conditions on the supply line.

The output currents of the A1148 switches HIGH in the presence of a south (+) polarity magnetic field of sufficient strength, and switches LOW otherwise, as in the presence of a weak field or a north (–) polarity field. The A1147 has an opposite output: the currents switch LOW in the presence of a south-polarity magnetic field of sufficient strength, and switch HIGH otherwise.

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

Also see: A1140-43 and A1145-46

SAMPLE & BUY

Astrorep Inc. (Allegro およびサンケン半導体、サンケン電源)
141 John Street, Suite 300
Babylon, NY 11702
電話: (631)422-2500
ファックス: (631)422-2504
Web: www.astrorepinc.com
電子メール: 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 switch-point drifting over operating temperature range
    • Low sensitivity to stress
  • Factory programmed at end-of-line for optimized switchpoints
  • On-chip protection
    • Supply transient protection
    • Reverse-battery protection
    • On-board voltage regulator
    • 3.5 to 24 V operation

Both versions are offered in two package styles. The LH is a SOT-23W, miniature low-profile package for surface-mount applications. The UA is a three-lead ultramini 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

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Product Image Functional Block Diagram

部品番号の仕様およびライフサイクル ステータス

Part Number Package Type Temperature RoHS
適合
部品構成 /
RoHS データ
Comments Samples 代理店の
在庫確認
A1147ELHLT-T 3-lead SOT -40°C to 85°C Y データを見る 生産中止
地域の販売担当者へのお問い合わせ
在庫の確認
A1147EUA-T 3-lead SIP -40°C to 85°C Y データを見る 生産中止
地域の販売担当者へのお問い合わせ
在庫の確認
A1147LLHLT-T 3-lead SOT -40°C to 150°C Y データを見る 生産中止
地域の販売担当者へのお問い合わせ
在庫の確認
A1147LUA-T 3-lead SIP -40°C to 150°C Y データを見る 生産中止
地域の販売担当者へのお問い合わせ
在庫の確認
A1148ELHLT-T 3-lead SOT -40°C to 85°C Y データを見る 生産中止
地域の販売担当者へのお問い合わせ
在庫の確認
A1148EUA-T 3-lead SIP -40°C to 85°C Y データを見る 生産中止
地域の販売担当者へのお問い合わせ
在庫の確認
A1148LLHLT-T 3-lead SOT -40°C to 150°C Y データを見る 生産中止
地域の販売担当者へのお問い合わせ
在庫の確認
A1148LUA-T 3-lead SIP -40°C to 150°C Y データを見る 生産中止
地域の販売担当者へのお問い合わせ
在庫の確認

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