Description

The A1171 integrated circuit is an ultrasensitive, Hall effect switch with latched digital outputs and either unipolar or omnipolar magnetic actuation. It features operation at low supply currents and voltages, making it ideal for battery operated electronics. The low operating supply voltage, 1.65 to 3.5 V, and unique clocking algorithm assist in reducing the average operating power consumption. For example, the power requirement is less than 15 μW with a 2.75 V supply.

Unlike more traditional Hall effect switches, the A1171 allows the user to configure how the device is magnetically actuated. Under default conditions the device activates output switching with either a north or south polarity magnetic field of sufficient strength. The magnetic actuation can be set via an external selection pin to operate in a unipolar mode, switching only on a north or south polarity but not both. Furthermore, the output of the A1171 can be configured to switch either off or on in the absence of any significant magnetic field. Lastly, the A1171 has two push-pull output structures.

Features and Benefits

▪ 1.65 to 3.5 V battery operation

▪ Low supply current

▪ High sensitivity, BOP typically 30 G (3.0 mT)

▪ Operation with either north or south pole

▪ Configurable unipolar or omnipolar magnetic sensing

▪ Complementary, push-pull outputs

▪ Chopper stabilized

▫ Superior temperature stability

▫ Extremely low switchpoint drift

▫ Insensitive to physical stress

▪ Solid state reliability

▪ Small size

A1171EEWLT-P属于传感器，变送器 > 磁性传感器 - 开关（固态）。Allegro MicroSystems制造生产的A1171EEWLT-P磁性传感器 - 开关（固态）该系列产品使用固态技术来检测是否存在超过某个特定幅度和/或标示的磁场，并提供指示是否存在此类磁场的双态输出。它们与磁簧开关以及线性或罗盘型固态器件不同，前者通过使用移动机械部件来提供类似的功能，后者提供指示所施加磁场的强度和/或方向的可变输出。