3240 - CHOPPER-STABILIZED/ PRECISION HALL-EFFECT SWITCH

Description

Chopper-Stabilized Technique.

The Hall element can be considered as a resistor array similar to a Wheatstone bridge.

A large portion of the offset is a result of the mismatching of these resistors.

Features

I I I I I I I Resistant to Physical Stress Superior Temperature Stability Output Short-Circuit Protection Operation From Unregulated Supply Reverse Battery Protection Solid-State Reliability Small Size Always order by complete part number: the prefix ‘A’ + the basic fourdigit part number + a suffix to indicate operating temperature range + a suffix to indicate package style, e. g. , A3240ELH . 3240.

Allegro MicroSystems

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Datasheet Details

Part number	3240
Manufacturer	Allegro MicroSystems
File Size	204.29 KB
Description	CHOPPER-STABILIZED/ PRECISION HALL-EFFECT SWITCH
Datasheet	3240 Datasheet
Additional preview pages of the 3240 datasheet.

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Full PDF Text Transcription

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3240 Suffix ‘–LT’ & ‘–UA’ Pinning CHOPPER-STABILIZED, PRECISION HALL-EFFECT SWITCH The A3240-- Hall-effect switch is an extremely temperature-stable and stress-resistant sensor 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. The device includes on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, 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.

Published: Mar 30, 2005 |