A1391屬于傳感器變送器的磁性傳感器-線性羅盤（IC）。由Allegro MicroSystems制造生產(chǎn)的A1391磁性傳感器 - 線性，羅盤（IC）該系列產(chǎn)品可用于將磁場強度作為一個可變數(shù)量進行測量，而相比之下，類似產(chǎn)品僅檢測是否存在強度超過某個限值的磁場。常見的應(yīng)用包括測量地球磁場，以類似于傳統(tǒng)羅盤的方式進行定向，市面上的一些器件允許以相對于磁場的物理方向直接讀取測量值。

Micro Power 3 V Linear Hall Effect Sensors with Tri-State Output and User-Selectable Sleep Mode

描述 Description

The A139x family of linear Hall effect sensor integrated circuits (ICs) provide a voltage output that is directly proportional to an applied magnetic field. Before amplification, the sensitivity of typical Hall effect ICs (measured in mV/G) is directly proportional to the current flowing through the Hall effect transducer element inside the ICs. In many applications, it is difficult to achieve sufficient sensitivity levels with a Hall effect sensor IC without consuming more than 3 mA of current.

Features and Benefits

? High-impedance output during sleep mode

? Compatible with 2.5 to 3.5 V power supplies

? 10 mW power consumption in the active mode

? Miniature MLP/DFN package

? Ratiometric output scales with the ratiometric supply reference voltage (VREF pin)

? Temperature-stable quiescent output voltage and sensitivity

? Wide ambient temperature range: –20°C to 85°C

? ESD protection greater than 3 kV

? Solid-state reliability

? Preset sensitivity and offset at final test