A3161

Data Sheet 27621.30A‡ 3161 HALL-EFFECT SWITCH FOR 2-WIRE APPLICATIONS This Hall-effect switch is a monolithic integrated circuit designed to operate continuously over extended temperatures to +85°C. The unipolar switching characteristic makes this device ideal for use with a simple bar or rod magnet. The A3161ELT and A3161EUA are identical except for package. Each device includes a voltage regulator for operation with supply voltages of 3.5 to 25 volts, reverse battery protection diode, quadratic Hall-voltage generator, temperature compensation circuitry, small-signal amplifier, Schmitt trigger, and a constant-current open-collector output. Noise radiation is limited by control of the output current slew rate. Two package styles provide a magnetically optimized package for most applications. Suffix ‘LT’ is a miniature SOT-89/TO-243AA transistor package for surface-mount applications; suffix ‘UA’ is a threelead ultra-mini SIP for through-hole mounting. V X CC 1 2 3 GROUND Dwg. PH-003-3 OUTPUT SUPPLY FEATURES and BENEFITS I I I I I I I I I Pinning is shown viewed from branded side. ABSOLUTE MAXIMUM RATINGS at TA = +25°C Supply Voltage, VCC Continuous ................................. 28 V Surge (tw ≤ 100 ms) .................... 40 V Reverse Battery Voltage, VRCC Continuous ................................ -25 V Surge (tw ≤ 100 ms) ................... -40 V Magnetic Flux Density, B ....... Unlimited Output OFF Voltage, VOUT .............. 28 V Operating Temperatur...