Description

The A3280, A3281, and A3283 Hall-effect latches

are ex treme ly temperature-stable and stress-resistant

sensor ICs especially suited for operation over extended

temperature ranges to +150°C. Superior high-temperature

per for mance is made possible through dynamic offset

cancellation, which reduces the residual offset voltage

normally caused by device overmolding, temperature

dependencies, and thermal stress. The three devices are

iden ti cal except for mag net ic switch points.

Each device includes on a single silicon chip a voltage

regulator, Hall-voltage generator, small-signal amplifier,

chopper sta bi li za tion, Schmitt trigger, and a short-circuit

protected open-collector output to sink up to 25 mA.

A south pole of sufficient strength will turn the output

on. A north pole is necessary to turn the output off. An

on-board regulator permits operation with supply voltages

of 4.2 to 24 volts.

Three package styles provide a magnetically op ti mized

pack age for most ap pli ca tions. Package type LH is a

modified SOT23W surface-mount package, LT is a

miniature SOT89/TO-243AA transistor package for

surface-mount applications; while UA is a three-lead

ultra-mini-SIP for through-hole mounting. Each package

type is lead (Pb) free (suffix, –T), with 100% matte tin

leadframe plating.