HAL700SF-K

Series:	HAL®
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Function:	Latch, Dual
Technology:	Hall Effect
Polarization:	North Pole, South Pole
Sensing Range:	-10.7mT Trip, 10.7mT Release; 19.1mT Trip, -19.1mT Release
Test Condition:	25°C
Voltage - Supply:	3.8 V ~ 24 V
Current - Supply (Max):	9mA
Current - Output (Max):	20mA
Output Type:	Open Drain
Features:	Temperature Compensated
Operating Temperature:	-40°C ~ 140°C (TA)
Package / Case:	TO-243AA, Variant
Supplier Device Package:	SOT-89B-2

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Introduction

Magnetic Sensors are a class of devices used in a wide variety of applications, such as sensing a door latching for an alarm system, detecting metal objects, and sensing current overloads. Magnetic sensors are primarily used to detect magnetic fields, usually for the purpose of detecting objects, and measuring them. Switches (Solid State) are a type of magnetic sensors which switch an electrical circuit on or off using a magnetic field as an input. The HAL700SF-K is a Solid State Switch using magnetic fields and a Hall Effect sensor to sense and switch electrical circuits.

HAL700SF-K

The HAL700SF-K is a Solid State Switch using a Hall Effect sensor to sense the presence or absence of a magnetic field and switch an electrical circuit on or off accordingly. The HAL700SF-K has two main components; a Hall Effect sensor and a signal amplifier. The Hall Effect sensor is an integrated circuit that senses a magnetic field and outputs an electrical signal. This signal is then amplified by the signal amplifier. The signal amplifier can be set with an adjustable voltage threshold to turn the circuit on or off, depending on the level of the signal it receives from the Hall Effect sensor.

HAL700SF-K Application Field

The HAL700SF-K can be used in a wide range of applications, such as automotive, medical, process control, security, and industrial applications. Some of the most common applications include, but are not limited to, automotive door latch sensing, security door unlocking/locking, and process control. The HAL700SF-K is particularly well suited to applications involving motion detection, such as opening and closing of doors, as it is able to detect a change in the magnetic field quickly and reliably.

HAL700SF-K Working Principle

The HAL700SF-K works by sensing the presence or absence of a magnetic field. When a magnetic field is present it triggers the Hall Effect sensor which in turn outputs an electrical signal. This signal is then amplified by the signal amplifier. Depending on the level of the signal, it will either trip the amplifier and switch the circuit on, or it will not, and the circuit remains off. The HAL700SF-K also has a built in fault-tolerant design, which will detect any failure on the line and automatically switch off the circuit.

Conclusion

The HAL700SF-K is a Solid State Switch designed to detect and switch an electrical circuit on or off using the presence or absence of a magnetic field. It is a reliable and accurate sensor, making it an ideal choice for a variety of applications, including automotive door latch sensing, security door unlocking/locking, and process control. The HAL700SF-K utilizes a Hall Effect Sensor and signal amplifier to detect and switch the electrical circuit on or off, making it a quick and reliable way to sense the presence or absence of a magnetic field.

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