The high-temperature Hall switches have temperature compensation function and are suitable for pulse counting applications in high temperature environment.
This document provides technical specifications and application information for the Allegro MicroSystems A3185, A3187, A3188, and A3189 Hall-effect latch series. These devices are specifically engineered for high-temperature operation, with suffix 'L' models supporting ranges up to +150°C.
The datasheet details the electrical and magnetic characteristics of the four basic part numbers, which differ primarily in their magnetic switch points (operate and release thresholds). It includes functional block diagrams, typical operating curves showing performance versus temperature and supply voltage, and mechanical drawings for three available package styles: LT (SOT-89/TO-243AA), U (mini-SIP), and UA (ultra-mini-SIP).
| Supply Voltage Range | 3.8 to 24 V |
|---|---|
| Continuous Output Current | 25 mA |
| Operating Temperature Range (Suffix L) | -40°C to +150°C |
| Storage Temperature Range | -65°C to +170°C |
Suffix 'L' models are designed for an operating temperature range of -40°C to +150°C.
The four basic devices are identical except for their magnetic switch points (operate and release thresholds).