HAL1822SF-A

Series:	HAL®1822
Packaging:	Tape & Reel (TR)
Part Status:	Active
Technology:	Hall Effect
Axis:	Single
Output Type:	Analog Voltage
Sensing Range:	±2.3mT
Voltage - Supply:	4.5 V ~ 5.5 V
Current - Supply (Max):	10mA
Current - Output (Max):	1mA
Resolution:	10 b
Bandwidth:	2.5kHz
Operating Temperature:	-40°C ~ 170°C (TJ)
Features:	Temperature Compensated
Package / Case:	TO-243AA, Variant
Supplier Device Package:	SOT-89B-1

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HAL1822SF-A Application Field and Working Principle

Magnetic sensors are devices used to provide feedback on magnetic field measurement and changes. They are used in a variety of applications such as medical, home automation, industrial, automotive, and navigation. The HAL1822SF-A is a halogen-free, 40-pin, linear, compass integrated circuit (IC) that is commonly used for these purposes. It can be used in a wide array of applications including motor control, navigational systems, and magnetic resonance imaging (MRI).

Application Field

The HAL1822SF-A is designed to provide a measurement of a 2-axis magnetic field. It is calibrated for use up to Gauss level per axis, enabling it to function in applications that measure magnetic fields of varying strengths. It can be used for motor control, navigation systems, and also for sensing the Earth\'s magnetic polar field. Additionally, it is also suitable for use in medical applications such as x-ray imaging and MRI systems. The HAL1822SF-A is primarily designed for use in automotive systems, as it can measure the magnetic field of the Earth\'s poles, in addition to providing precise measurements of small magnetic fields related to motor control. This makes it suitable for use in automotive navigation systems such as anti-lock braking systems (ABS), cruise control, and traction control.

Working Principle

The HAL1822SF-A is a linear, compass IC with an integrated Hall effect. The Hall effect is a principle in physics by which a voltage or current is generated in a material when a magnetic field is applied to it. The HAL1822SF-A uses this effect to measure the intensity and direction of a nearby magnetic field. The device contains two linear Hall sensors, one for each axis of the device. The sensors measure the magnetic fields of the specified axes as a voltage, which can then be read by the IC or external devices. The readings are superimposed on a reference voltage, effectively allowing for more precise measurements of small variations in the magnetic field.The HAL1822SF-A provides a number of digital and analog output signals that can be used to further process the data retrieved by the sensors. These signals include a signal for each Hall element, two differential analog output signals, four digital output signals, and three I²C output signals.

Conclusion

The HAL1822SF-A is a versatile magnetic sensor IC designed for use in applications that measure up to Gauss level magnetic fields. It is most commonly used in automotive navigation systems and medical imaging, although it is also suitable for use in other applications. The device using the Hall effect to measure the intensity and direction of a nearby magnetic field, and provides a number of digital and analog signals for further processing.

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