QT118H-ISG Integrated Circuits (ICs)

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The QT118H-ISG is a capacitive touch mode sensor with integrated self-capacitance sense technology. It allows very fast and accurate recognition of any number of touch keys and is perfect for applications such as home automation, control panel and gaming. This sensor has two integrated sensing modes that are mutually exclusive. The self-capacitance sensing mode is used for detecting touches from objects without a metal content, such as fingers or gloved hands. The mutual capacitance sensing mode is used for detecting touches from metal objects such as coins or keys.

The QT118H-ISG is a low power, high performance single-zone capacitive touch sensor that uses two sensing electrodes to detect a capacitive change due to finger proximity. It integrates self-capacitance sensing technology, providing superior sensitivity and faster response times. The device is designed to provide reliable operation regardless of the environment, as it allows detection of touches even through thick materials like glass or plastic, and in warm and humid conditions.

The QT118H-ISG also provides an integrated minimum touch detect function, which allows the detection of very small touches. This feature is vital for applications that require a precise and responsive touch input, such as gaming applications. The device also includes an integrated guard electrode for improved suppression of false touches, and a guard touch detect feature for improved detection performance, which is especially important in noisy or RF-intensive environments.

The QT118H-ISG features a wide bandwidth to ensure fast response times, and its low power consumption and low operating voltage make it an ideal choice for applications that require long battery life. Its small size allows for easy integration into any design, and it can be easily interfaced to a host microcontroller through either an I2C or SPI interface.

The device performance can be adjusted by changing the touch threshold value in order to match the application requirements and to achieve the desired touch sensitivity. The adjustment of the device parameters is done with the use of two different registers, the control and the configuration registers. The control register can be used to set the threshold levels, the number of sensing cycles, the filter settings, and the self-test mode. The configuration register is used to configure the device operation mode as well as the desired output format.

In order to make sure the QT118H-ISG is working accurately, a self-test mode can be activated to evaluate the overall performance of the device. The self-test mode is an excellent way to quickly ensure that the device is working correctly and it can be used to identify any potential problems. It also allows for easy debugging and troubleshooting of any issues in the system.

Overall, the QT118H-ISG capacitive touch mode sensor is a great option for applications such as home automation, control panels and gaming. It integrates two sensing modes, self-capacitance and mutual capacitance, and provides reliable and accurate detection of touches. And its low power consumption, low operating voltage and integrated self-test mode make it an ideal choice for many applications.

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