The A3260 is a Hall-effect bipolar switch that is extremely temperature stable and stress resistant. It is particularly suitable for operation in extended temperature ranges up to +150 °C. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The device includes on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a constant-current open-collector output. A south pole of sufficient strength will turn the output OFF. An on-board regulator permits operation with supply voltages of 3.5 to 24 volts. Noise radiation is limited by control of the output current slew rate. The first character of the part number suffix determines the device operating temperature range; suffix ‘E–’ is -40 °C to +85 °C and ‘L–’ is -40 °C to +150 °C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LH’ is a miniature low-profile surface-mount package, ‘–LT’ is a miniature SOT-89/TO-243AA transistor package for surface-mount applications; while suffix ‘–UA’ is a three-lead ultra-mini-SIP for through-hole mounting. Data Sheet 27631.50 Features I Internal Current Regulator for 2-Wire Operation I Output Slew Rate Controlled I Resistant to Physical Stress I Superior Temperature Stability I Operation From Unregulated Supply I Rever
The Allegro MicroSystems A3260 is a 2-wire, chopper-stabilized, precision Hall-effect bipolar switch designed for operation over extended temperature ranges up to +150°C. It features an internal current regulator for 2-wire operation, output slew rate control, and reverse battery protection. The device integrates a voltage regulator, Hall-voltage generator, amplifier, and Schmitt trigger on a single silicon chip.
| Supply Voltage | 3.5 to 24 V |
|---|---|
| Output Current (ON) | 40 to 65 mA |
| Output Current (OFF) | -11 to -145 mA |
| Chopping Frequency | 340 kHz |
| Output Settling Time | 20 µs |
| Operate Point | 10 to 30 G |
| Release Point | -30 to -10 G |
The operating temperature range for suffix 'L' is -40°C to +150°C.
The device permits operation with supply voltages of 3.5 to 24 volts.