AH375-PG-A

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The AH375-PG-A is a top-of-the-line magnetic sensor switch manufactured by Allegro MicroSystems. It is part of a class of devices known as solid-state magnetic switches, due to the use of dedicated circuitry and magnetic materials instead of mechanical components to detect magnetic fields. This type of device is typically used in applications where precision switching and reliability are paramount, and it has become a staple in the industrial, automotive, and aerospace industries.

The AH375-PG-A is designed to function reliably even in extreme liquid, temperature, and dust-ridden environments. It is also resistant to EMI, meaning it can be used in electrically noisy environments with minimal effect on the sensor’s performance. The device contains a hermetically sealed reed switch, along with a sensing element that is encapsulated by an epoxy-like material. The sensing element consists of a planar coil that detect changes in the presence of a magnetic field.

The working principle behind the AH375-PG-A is the Hall Effect. The sensing element uses a small current applied to the planar coil to detect a measurable change in the presence of a magnetic field. When the Hall Effect is encountered, the coil produces a voltage that causes an internal pull-up resistor to become closed, which then switches the state of the output terminal signal to a logic level, either “on” or “off”. The AH375-PG-A features a wide sensing range from 0.1 millitesla to 10.5 millitesla and a standard supply current of 10mA.

The AH375-PG-A is commonly used in a variety of applications. It can be used as a proximity switch to measure the presence of a magnetic field, or as a digital threshold switch to detect a predetermined level of magnetic field. It can also be used as a device to trigger alarms or other signals when a preset threshold is encountered or exceeded. Other uses include shutoff and restart system applications, torque sensing systems, motor control systems, and over-voltage protection applications.

In terms of features, the AH375-PG-A is designed to offer superior performance and reliability. It includes an integrated CMOS integrated circuit for high noise immunity, an integrated reflow temperature capability, and an over-temperature protection feature. It also contains a multi-level switching option, allowing it to switch between multiple discrete signals, and an automatically-adjustable switching point in case of different hysteresis needs. The device also includes a latch signal for quick monitoring of the device’s output state.

Overall, the AH375-PG-A is a top-quality magnetic sensor switch designed to offer reliable performance and ease-of-use in a variety of applications. Its precision and reliability make it an ideal choice for applications where accuracy is essential, and its hermetically sealed reed switch and sensing element make it highly-resistant to liquid, dust, and extremes of temperature. Its wide operating range and low power requirements make it suitable for a variety of applications, and its integrated CMOS circuitry and multi-level switching options make it a versatile and reliable solution for many industrial, automotive, and aerospace applications.

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