Hall-Effect Sensor - US1881 (Latching)

The US1881 is a compact, integrated Hall-Effect latched sensor with the ability to toggle its output pin when a magnet is held near it. This feature makes it an excellent choice for a robust presence sensor. Compared to a reed sensor, a Hall-Effect sensor is significantly smaller and more compact, though it can handle less current.

The US1881 comes with an on-chip Hall voltage generator which aids in magnetic sensing. It also includes a comparator that amplifies the Hall voltage, and a Schmitt trigger that provides switching hysteresis for noise rejection and an open-collector output. The device also features an internal bandgap regulator that provides temperature compensated supply voltage for its internal circuits, allowing it to operate within a wide supply range.

When the magnetic flux density exceeds the threshold Bop, the DO is switched on (low). The output state is maintained until the magnetic flux density reverses and falls below Brp, causing the DO to switch off (high).

The US1881 is packed with features that make it an ideal choice for various applications. It operates within a voltage range of 3.5V to 24V DC and has low current consumption. It offers temperature compensation, a wide operating voltage range, and an open-collector pre-driver. It can sink a maximum output current of 50mA and has reverse polarity protection. The device is also environmentally friendly, coming in a lead-free package: TO-92.

The US1881 can be used in a variety of applications that require the detection of magnetic fields. It's perfect for robotics, alarm systems, or any other project where magnetic field sensing is needed. The small size of the sensor also makes it ideal for use in compact devices or systems.

With its unique features and capabilities, the US1881 Hall-Effect sensor provides a practical and efficient solution for magnetic field detection. It's a reliable and robust sensor that offers excellent performance and flexibility for a wide range of applications.