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