A1180LUA

A1180LUA Datasheet


A1180, A1181, A1182, and A1183

Part Datasheet
A1180LUA A1180LUA A1180LUA (pdf)
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A1183LUA A1183LUA A1183LUA
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A1180LUA-T A1180LUA-T A1180LUA-T
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A1180, A1181, A1182, and A1183

Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall-Effect Switches

Chopper stabilization Low switchpoint drift over operating temperature range Low sensitivity to stress

Field programmable for optimized switchpoints On-chip protection

Packages 3 pin SOT23W suffix LH , and 3 pin SIP suffix UA

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 device and placement into the application. This advanced feature allows the optimization of the device 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, chopperstabilization 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 in sensing 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

Not to scale

V+ VCC

Dynamic Offset Cancellation

Sample and Hold

Continued on the next

Functional Block Diagram

Program/Lock

Programming Logic

Offset

Clock/Logic Amp

Low-Pass Filter

Regulator

GND Package UA Only

A1180, A1181, A1182, and A1183

Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall Effect Switches

Description continued
wire than the more traditional open-collector output switches. Additionally, the system designer gains inherent diagnostics because output current normally in either of two 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 of strength and switch LOW otherwise, including when there is no magnetic present. The A1180 and A1182 have inverted out-
put current levels switching LOW in the presence of a south polarity magnetic of strength, and HIGH otherwise. The devices also differ in their LOW current supply levels. Both devices are offered in two package styles LH, a SOT-23W miniature 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 with 100% matte tin plated leadframe.

Factory-programmed versions are also available. Refer to A1140, A1141, A1142, A1143, A1145, and A1146.

Selection Guide

Packing1

A1180ELHLT-T3 A1180LUA-T4
7-in. reel, 3000 pieces/reel Bulk, 500 pieces/bag

Mounting Surface mount SIP through hole

Ambient, TA °C
to 85

Output South + Field2

Supply Current at Low Output, ICC L mA
2 to 5

A1182ELHLT-T4 A1182EUA-T4 A1182LLHLT-T4 A1182LUA-T4 A1183ELHLT-T4 A1183EUA-T4 A1183LLHLT-T4 A1183LUA-T4
7-in. reel, 3000 pieces/reel Bulk, 500 pieces/bag
7-in. reel, 3000 pieces/reel Bulk, 500 pieces/bag
7-in. reel, 3000 pieces/reel Bulk, 500 pieces/bag
More datasheets: 16NHC00M | 50NHC00M | 40NHC00M | 4NHC00M | CY4602 | A1182LLHLT | A1180ELHLT | A1180EUA | A1180LLHLT | A1180LLHLT-T


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Datasheet ID: A1180LUA 516001