Description

New applications for linear output Hall effect sensors, such as displacement, angular position, and current measurement, require high accuracy in conjunction with small package size. The Allegro? A138x family of programmable linear Halleffect sensors was designed specifically to achieve both goals. These temperature-stable devices are available in a miniature surface mount package (SOT23-W) and an ultramini through hole single-in-line package. The accuracy of these devices is enhanced via programmability on the output pin for end-of-line optimization without the added complexity and cost of a fully programmable device.

Features and Benefits

? Customer programmable offset, sensitivity, sensitivity temperature coefficient, and polarity

? Programmability at end-of-line

? Ratiometric sensitivity, quiescent voltage output, and clamps for interfacing with application DAC

? Temperature-stable quiescent voltage output and sensitivity

? Precise recoverability after temperature cycling

? Output voltage clamps provide short circuit diagnostic capabilities

? Wide ambient temperature range: –40°C to 150°C

? Immune to mechanical stress

? Miniature package options

A1381屬于傳感器，變送器 > 磁性傳感器 - 線性，羅盤(pán)（IC）。Allegro MicroSystems制造生產(chǎn)的A1381磁性傳感器 - 線性，羅盤(pán)（IC）該系列產(chǎn)品可用于將磁場(chǎng)強(qiáng)度作為一個(gè)可變數(shù)量進(jìn)行測(cè)量，而相比之下，類(lèi)似產(chǎn)品僅檢測(cè)是否存在強(qiáng)度超過(guò)某個(gè)限值的磁場(chǎng)。常見(jiàn)的應(yīng)用包括測(cè)量地球磁場(chǎng)，以類(lèi)似于傳統(tǒng)羅盤(pán)的方式進(jìn)行定向，市面上的一些器件允許以相對(duì)于磁場(chǎng)的物理方向直接讀取測(cè)量值。