This document describes the A1185 and A1186 ultrasensitive, two-wire, unipolar Hall effect switches.
The A1185 and A1186 are ultrasensitive, two-wire, unipolar Hall effect switches produced on Allegro MicroSystems' DABICS BiCMOS process. They utilize a patented high-frequency chopper-stabilization technique to achieve magnetic stability and eliminate offsets inherent in single-element devices.
| Supply Voltage Range | 3.5 to 24 V |
|---|---|
| Chopping Frequency | 200 kHz |
| Hysteresis (Buys) | 5 to 30 G |
They are ultrasensitive, two-wire, unipolar Hall effect switches used to sense seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position.
Chopper stabilization eliminates offsets that are inherent in single-element devices exposed to harsh application environments.
They are offered in two package styles: 3 pin SOT23W (suffix LH) and 3 pin SIP (suffix UA).