AK8977A

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Magnetic sensors play a vital role in modern technology, and are used in a wide variety of applications. The AK8977A magnetic sensor, for instance, is a linear, compass IC developed by AKM Semiconductor that is used in a variety of consumer and industrial applications. This article will explain the AK8977A application field and working principle.

What is the AK8977A?

The AK8977A is a linear, compass integrated circuit (IC) manufactured by AKM Semiconductor. This IC provides a compass detection with very low power consumption and features a large detection range and a wide ambient temperature range. It is used in a variety of applications from consumer electronic products to industrial control systems.

AK8977A Application Field

The AK8977A can be used in a variety of applications such as personal navigation systems, game controllers, industrial control systems, consumer electronics and office equipment as well as cellular phones. The AK8977A provides a low power consumption solution for detecting the North-South direction of apparatus.

AK8977A Working Principle

The AK8977A is equipped with a Hall effect sensing element and operates with two magnetic sources. The Hall effect sensing element comprises two sets of sensing electrodes arranged horizontally and vertically. The two sensing electrodes detect differentials in magnetic flux that enable the detection of the North-South direction of apparatus. The AK8977A operates on supply voltage of +2.7V to +4.3V and the current consumption when measuring with 2.7V and 20mV increments in magnetic flux is only 5.5uA.

The AK8977A is designed to output the 2-bit direction information, which can be used to interface with an 8-bit microcontroller. The signal output of the AK8977A will depend on the movement of the object. In the presence of no magnetic field, the output will remain at a logic high. When the object is rotated, the output will toggle from high to low in such a way that it alternately indicates the North-South direction.

Another important feature of the AK8977A is its robust temperature stability. The AK8977A is designed to work correctly between -20°C to +60°C, while the temperature stability can reach 0.5ppm/°C, ensuring reliable performance in a variety of environments. In addition, the AK8977A features a low temperature drift ratio of 0.18nT/°C, which means that the direction information output is not easily affected by ambient temperature.

Conclusion

The AK8977A is an advanced linear, compass IC developed by AKM Semiconductor. This IC offers a robust compass detection with very low power consumption. It is used in various applications from consumer electronics to industrial control systems. The AK8977A operates on the principle of differential magnetic flux detection with two sets of sensing electrodes arranged horizontally and vertically. Furthermore, the AK8977A can operate within a wide ambient temperature range while providing a high degree of stability.

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