High temperature hall effect latches for low voltage applications

Allegro MicroSystems' APS12205 and APS12215 Hall effect sensor ICs, available now from Digi-Key, are AEC-Q100 qualified for operation from 2.8V to 5.5V. They are extremely temperature-stable and stress-resistant devices especially suited for operation over extended junction temperature ranges up to 175C. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device over molding, temperature dependencies, and thermal stress. The single silicon chip includes a Hall plate, small signal amplifier, chopper stabilization, Schmitt trigger, and a short-circuit-protected open-drain output to sink up to 10mA. A south pole of sufficient strength turns on the output; a north pole of sufficient strength is necessary to turn off the output. Two package styles provide a choice of through-hole or surface mounting. Package type LH is a modified three-pin SOT23W surface-mount package, while UA is a three-pin ultraminiature SIP for through-hole mounting. Both packages are lead (Pb) free with 100% matte-tin-plated lead frames.