描述 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 Hall effect 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 throughhole 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.

These ratiometric Hall effect sensors provide a voltage output that is proportional to the applied magnetic field. Both the quiescent voltage output and magnetic sensitivity are useradjustable. The quiescent voltage output can be set around 50% of the supply voltage, and the sensitivity adjusted between 2 mV/G and 9 mV/G over the device family. Programming selections also exist for output polarity and temperature compensation. The features of this linear family make it ideal for high accuracy requirements of automotive and industrial applications, and performance is guaranteed over an extended temperature range, –40°C to 150°C.

Each BiCMOS monolithic circuit integrates a Hall element,temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, a clamped low-impedance output stage, and a proprietary dynamic offset cancellation technique.

The A138x sensors are provided in a 3 pin ultramini single-in-line package (UA suffix), and a 3 pin surface mount SOT-23W package(LH suffix).

特性 Features

? 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

簡(jiǎn)介

A1382屬于傳感器變送器的磁性傳感器-線性羅盤（IC）。由制造生產(chǎn)的A1382磁性傳感器 - 線性，羅盤（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)。常見的應(yīng)用包括測(cè)量地球磁場(chǎng)，以類似于傳統(tǒng)羅盤的方式進(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。