A1220

A1220, A1221, A1222, and A1223 Chopper-Stabilized Precision Hall-Effect Latches FEATURES AND BENEFITS AEC-Q100 automotive qualified Quality Managed (QM) Symmetrical latch switch points Resistant to physical stress Superior temperature stability Output short-circuit protection Operation from unregulated supply down to 3 V Reverse-battery protection Solid-state reliability Small package sizes PACKAGES: Not to scale 3-pin SOT23W (suffix LH) NOT FOR NEW DESIGN 3-pin SIP, matrix HD style (suffix UA) 3-pin SIP, chopper style (suffix UA) DESCRIPTION The A1220, A1221, A1222, and A1223 Hall-effect sensor ICs are extremely temperature-stable and stress-resistant devices especially suited for operation over extended temperature ranges 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. Each device includes on a single silicon chip a voltage regulator, Hallvoltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-drain output to sink up to 25 mA. A south pole of sufficient strength turns the output on. A north pole of sufficient strength is necessary to turn the output off. An onboard regulator permits operation with supply voltages of 3 to 24 V. The advantage of operating down to 3 V is that the device can be used in 3 V applica...