AT42QT2120-SU

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The AT42QT2120-SU is a single-channel capacitive touch sensor controller with an advanced capacitive touch detection system. This device works as a programmable sensing device to detect the presence of a finger, as well as the size, shape and location of the finger on the capacitive touch panel. It can be used to interface with various electronic systems.

The AT42QT2120-SU is designed for use in the sensing and control applications where electrostatic field sensing is used to detect the presence of a finger or other capacitive objects. It utilizes a capacitive touch detection system that can detect the presence of a finger on a capacitive touch panel, as well as its size, shape and location. The device is capable of detecting a finger as close as 4mm away, as well as detecting the finger size and shape. The AT42QT2120-SU is an ideal solution for interface control applications such as portable or embedded control, HMI, and other user interface applications.

The working principle behind the AT42QT2120-SU is based on the electrostatic detection method. The device uses a capacitive linear array with a capacitive-sensing area which can be customized according to customer requirements. The device enables the user to select a specific number of electrodes connected to a dedicated hardware instance to measure the presence of a finger based on the change in capacitance values. The device is also capable of recognizing multiple fingers, up to 10. Once a finger is detected, the change in capacitance values will be recorded and further analyzed to distinguish the shape and size of the finger. Thus, the device becomes more accurate and precise in detection of the finger contact.

In addition, the AT42QT2120-SU provides a programmable stand-by state, which allows the device to enter a lower power consumption state when not in use. This feature reduces the overall power consumption of the product, while still providing reliable sensing performance.

The AT42QT2120-SU is widely used in capacitive touch sensing applications such as touch slides, touch buttons, as well as gesture control. The device is also used in portable appliances and home electronics, as well as automotive applications. The device provides a cost-effective solution for these applications due to its low power consumption, small form factor, and excellent performance.

Overall, the AT42QT2120-SU is a single-channel capacitive touch sensor controller with a programmable sensing system. It is suitable for use in numerous sensing and control applications. The device is cost-effective, low power consuming, and offers excellent sensing performance. It is an ideal solution for interfacing with various electronic systems and providing accurate and precise touch sensing.

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