CY8C20180-SX2I

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The tiny CY8C20180-SX2I capacitive-sensing device from Cypress Semiconductor offers a complete, multi-functional solution to allow the user to have the capability of sensing and detecting a wide range of touch targets. The CY8C20180-SX2I is highly integrative, low-power, low-cost, and shield-less capacitive-sensing device that supports both General Purpose Input Output (GPIO) and Multi-finger Touch. This device, along with its self-capacitance sensing capability and advanced SmartSense technology, makes it an ideal choice for many touch interface applications.

Applications

The CY8C20180-SX2I is designed for usage in a variety of applications such as, but not limited to, industrial, consumer, and medical products. Specifically, it can be used alongside consumer electronics, such as laptop computers, smartphones, and tablets. Additionally, they can be used in medical instruments, such as biomedical sensors, as well as in security, access control and fingerprint recognition systems.

Working Principle

The CY8C20180-SX2I operates on the principle of self-capacitance sensing. This technology works by measuring the change in capacitance at a certain point on the touch target. The sensing pixel measurement is based on the capacitive sensing properties to determine the presence of touches in the area. It has very few external components and can be sensitive enough to detect a single-finger touch.

When a touch is detected, the CY8C20180-SX2I device will automatically measure the capacitance of the touch target at the edge of the sensing pixel. The device then compares this value to a preset threshold. If the value of the capacitance exceeds the defined threshold the device will register a touch.

The device also features a SmartSense technology that works to cancel out any unwanted noise in the environment. The SmartSense technology works by scanning each row or column of the sensing matrix multiple times to determine the presence of a touch. This ensures that any nearby noise or signals are treated separately and do not affect the effectiveness of the sensing.

Conclusion

The CY8C20180-SX2I capacitive-sensing device offers a complete and multi-functional solution for a wide range of touch target applications. Its self-capacitance sensing capability and advanced SmartSense technology make it an ideal choice for many touch interface applications. This device has very few external components and can be sensitive enough to detect a single-finger touch. All of these features, combined with its low-power, low-cost, and shield-less design, make the CY8C20180-SX2I a great option for anyone looking to integrate a sensor into their project.

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