HAL1822UA-A

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Magnetic sensors are used in a variety of fields, from consumer electronics like cell phone cameras to industrial and medical applications. The HAL1822UA-A is a magnetic field sensor IC optimized for linear, compass and angle measurements in applications requiring low power consumption and small size. It is an important tool for manufacturers seeking to increase accuracy and efficiency in such applications.

Overview

HAL1822UA-A is an integrated circuit which combines the signal conditioning, amplifier and analog-to-digital converter into a single chip. It is designed for measurement of magnetic fields in 3 axes over a range of -2 to +2 gauss. The onboard amplifier is optimized for detection of small signals and minimizes the external circuitry needed to achieve desired sensitivities. The ASA integration feature further enhances capability in reducing integration errors due to G or B field offsets. The ADC has 12-bit resolution and can be configured to produce a 10-bit output signal.

Features

The HAL1822UA-A provides 12-bit resolution, 10-bit analog-to-digital conversion, and onboard amplifier. It also features an ASA integration function, low power consumption, a 16-bit I2C interface, programmable I2C address, on-chip temperature compensation, programmable interrupt, analog and digital supply and low self-heating.

Applications

HAL1822UA-A is suitable for applications requiring accurate linear and compass measurements, such as navigation systems, industrial position measurements, motors, vibrators, medical instruments, and magnetic field sensors.

Working Principle

The HAL1822UA-A features three axes of magnetic field measurement. An on-chip amplifier conditioned the signal before being fed to the 12-bit ADC with 10-bit digital output. ASA integration further improves signal accuracy, compensating for any G-field offsets. The sensor can be programmed to provide an interrupt based on a set threshold, further minimizing power consumption. The sensor is also temperature compensated, improving accuracy and providing reliable long-term operation in changing environments. The I2C interface provides convenient access for system control and data transferring. The low power consumption also makes the HAL1822UA-A a feasible solution for low power applications.

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