A1148ELHLT-T
A1148ELHLT-T Datasheet
A1147 and A1148
| Part | Datasheet |
|---|---|
A1148ELHLT-T |
A1148ELHLT-T (pdf) |
| Related Parts | Information |
|---|---|
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A1147ELHLT |
A1147ELHLT |
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A1147ELHLT-T |
A1147ELHLT-T |
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A1147LUA-T |
A1147LUA-T |
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A1147LUA |
A1147LUA |
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A1147LLHLT-T |
A1147LLHLT-T |
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A1147LLHLT |
A1147LLHLT |
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A1147EUA-T |
A1147EUA-T |
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A1147EUA |
A1147EUA |
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A1148ELHLT |
A1148ELHLT |
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A1148EUA |
A1148EUA |
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A1148LLHLT |
A1148LLHLT |
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A1148LUA-T |
A1148LUA-T |
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A1148EUA-T |
A1148EUA-T |
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A1148LLHLT-T |
A1148LLHLT-T |
|
A1148LUA |
A1148LUA |
| PDF Datasheet Preview |
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| A1147 and A1148 Low Current Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches Chopper stabilization Low switchpoint drift over operating temperature range Low sensitivity to stress Factory programmed at end-of-line for optimized switchpoints Packages 3 pin SOT23W suffix LH , and 3 pin SIP suffix UA 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 Not to scale V+ VCC Dynamic Offset Cancellation Sample and Hold Continued on the next Functional Block Diagram Clock/Logic Amp Regulator To All Subcircuits Low-Pass Filter GND Package UA Only A1147 and A1148 Low Current Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches Description continued 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 SOT23W, 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, with 100% matte tin plated leadframe. Field-programmable versions also available A1180 and A1181. Selection Guide Pb-Free Packing1 Package A1147ELHLT-T Yes Tape and Reel, 3000 pieces/reel A1147EUA-T Yes Bulk Bag, 500 pieces/bag A1147LLHLT-T Yes Tape and Reel, 3000 pieces/reel A1147LUA-T Yes Bulk Bag, 500 pieces/bag A1148ELHLT-T Yes Tape and Reel, 3000 pieces/reel A1148EUA-T Yes Bulk Bag, 500 pieces/bag A1148LLHLT-T Yes Tape and Reel, 3000 pieces/reel |
| More datasheets: A1147LLHLT | A1147EUA-T | A1147EUA | A1148ELHLT | A1148EUA | A1148LLHLT | A1148LUA-T | A1148EUA-T | A1148LLHLT-T | A1148LUA |
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