D27AS04

D27AS04 is an advanced 4-wire resistive touch screen controller designed to give an optimal touch experience on the surface of multi-touch screen. Due to its simplified architecture and advanced signal processing technology, D27AS04 is capable of enabling high performance sensitivity and immunity against false touches. In addition to support for four-finger multi-touch scenarios, it can also offer additional gesture support.In essence, D27AS04 is an application specific integrated circuit (ASIC) designed to provide reliable robust touch performance. It uses a patented four-wire architecture to capture signals from the touch panel. It operates at a low voltage of 2.5V, and its low power consumption makes it highly efficient. Moreover, its on-board digital processor provides powerful noise reduction and signal enhancement algorithms. This ASIC supports both self-capacitive and mutual capacitance sensing technologies, allowing it to be used in both phone and tablet applications.Application field:D27AS04 is designed to provide a reliable, robust touch experience for mobile devices and other consumer electronics. Its low power consumption makes it an ideal choice for portable applications, such as tablets, mobile phones, and digital cameras. Additionally, due to its strong immunity to false touches, D27AS04 is suitable for usage in harsh environments, such as auto infotainment systems. Its integrated touch screen technology is also used in public information systems, POS systems, and office automation systems. Working Principle:The D27AS04 controller works by capturing signals from the touch panel via a four-wire resistive sensing system. With its capacitive sensing technology, it is capable of detecting various types of touch points on the surface of the screen. These touch points are then processed by the on-board processor. During the signal processing, noise and false touches are filtered out while valid touches are passed through. The specifically enhanced algorithms on the processor provide an optimal response to touches from the user. It can detect up to four finger touches simultaneously and offer various gesture support. Additionally, its sensitivity can be adjusted by size of the panel to provide a more personalized touch experience.Conclusion:Overall, the D27AS04 is an advanced 4-wire resistive touch screen controller specifically designed for mobile devices and other consumer electronics. It uses a patented four-wire architecture to capture reliable signals from the touch panel. Its integrated digital processor provides powerful noise reduction, signal enhancement, and gesture support. By combining low voltage and low power consumption, D27AS04 enables a robust touch experience while being highly efficient.

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