AH276UZ4-BG1

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Magnetic Sensors - Switches (Solid State) provide a variety of applications and operational principles for a particular application. The AH276UZ4-BG1 series from Allegro MicroSystems is a circular Hall-effect switch that utilizes a bipolar latching circuit and three integrated power vertical Hall elements. This device has a non-directional Hall-effect switch that provides a digital response to the presence of a magnetic field. The device is suitable for operation in industrial and consumer application such as battery-operated devices, motor control, door closure detection, and motor protection.

The AH276UZ4-BG1 features a fast responding latching circuit that is operated with a digital input. The output circuit incorporates an integrated power vertical Hall element of the Three Level Type and features an output that changes at a predetermined magnetic threshold. The AH276UZ4-BG1 is claimed to be one of the fastest responding Hall sensors in the industry.

The AH276UZ4-BG1 operationally works in a manner similar to other Hall-effect sensors. The device utilizes Hall elements that are placed in the proximity of a magnetic field and generates an electrical signal when exposed to the field. The output signal of the detection circuit changes when the level of the magnetic field exceeds or falls below a predetermined threshold value. The Hall elements of the AH276UZ4-BG1 provide a symmetrical detection range that is ±0.06T on each side of the predefined threshold level.

The AH276UZ4-BG1 has a maximum operating current of 2.6mA, and an extended operating temperature range of -40°C to 150°C. In addition, the device features an integrated suppressor circuit, which helps protect it from transient voltage spikes. The extended temperature range and the integrated suppressor circuit of the AH276UZ4-BG1 makes it suitable for use in applications that require extreme temperature operating conditions and robust immunity to ESD. The AH276UZ4-BG1 meets the RoHS 2011/65/EU, WEEE 2002/96/EC and Restriction of Hazardous Substances Directive requirements for use in consumer and industrial markets.

The AH276UZ4-BG1 is implemented in applications for closed systems detection, motor protection, safety-critical applications, industrial automation systems, door-closure detection, consumer based applications, motor control, battery operated applications, and many others. It is specifically designed for applications with high reliability and tight tolerance requirements. In addition, it is suitable for use in applications where interrupting and latching of the output signal is required at high magnetic fields, so that the need for manual re-set can be avoided.

The AH276UZ4-BG1 combines high speed magnetic responding, latching user-programmable output, and an integrated voltage regulator, offering a highly sensitive digital design that offers a number of advantages over an analog design. The device can be used in battery-operated applications as it requires only a few nano amperes of quiescent current. It is suitable for use in applications where reduced voltage supplies are required for sensing the magnetic threshold.

In summary, the AH276UZ4-BG1 is a circular Hall-effect switch that provides a digital response to the presence of a magnetic field. It features a fast responding latching circuit operated with a digital input. The device can be used in a variety of applications, from industrial automation systems, door-closure detection, motor protection, consumer based applications, battery-operated devices, and motor control, among many others. It offers advantages such as a robust immunity to ESD, an integrated suppressor circuit, an extended operating temperature range of -40°C to 150°C, and a peak operating current of 2.6mA. In addition, it features a latching user-programmable output and an integrated voltage regulator. This makes the AH276UZ4-BG1 a reliable and robust digital design for a variety of applications.

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