Features: 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 V to 24 V operationSpecificationsSupply Voltage, VCC ..........................................28 V
Reverse-Supply Voltage, VRCC .......................18 V
Magnetic Flux Density, B ............................ Unlimited
Operating Temperature
Ambient, TA, Range E..........................40ºC to 85ºC
Ambient, TA, Range L........................40ºC to 150ºC
Maximum Junction, TJ(max)...............................165ºC
Storage Temperature, TS .................65ºC to 170ºCDescriptionThe A1180, A1181, A1182, and A1183 devices are sensitive, two-wire, unipolar, Hall effect switches. The operate point, BOP, can be fi eld-programmed, after fi nal packaging of the sensor and placement into the application. A1180, A1181, A1182, and A1183 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.
A1180, A1181, A1182, and A1183 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, A1181, A1182, and A1183 family of devices are utilized to sense: seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position
A1181 Data Sheet
