QT140-ASG Integrated Circuits (ICs)

The QT140-ASG capacitive touch sensing system is a highly reliable and accurate technology used in a variety of applications. The system uses the combination of two components, a touch sensor and a signal processor, to measure the capacitance of the object being touched. This enables the system to measure both the object\'s capacitance and the object\'s movement.

The touch sensor consists of two electrodes and is placed adjacent to the object being touched. The electrode arrangement allows the electrical field generated by the sensor to detect changes in the capacitance of the object. The signal processor is then used to analyze the changes in capacitance to determine the position of the object in contact with the sensor.

The QT140-ASG capacitive touch sensing system is used in a variety of applications. It is ideal for applications where precise measurements, such as in medical diagnostics, are required as the system is able to detect both the object\'s capacitance and the object\'s movement. It is also used in touch-sensitive input devices such as industrial controls, computer input devices, and gaming controllers. The system is also used in domestic applications, such as door and window security systems, window curtains and blinds, and motorised staircases.

The QT140-ASG capacitive touch sensing system is often used in robotic systems for tasks such as grasping objects, in autonomous driving systems for obstacle avoidance, and in navigation systems for precise positioning. It is also used in smart home systems for automation and control. Additionally, the system is increasingly being used in a variety of industrial applications to measure the capacitance of a material being processed.

In terms of working principle, the QT140-ASG capacitive touch sensing system is based on the principle of capacitive coupling. When a high-frequency current is applied to the touch sensor the electric field generated between the two electrodes interacts with the object being touched. The object\'s capacitance will be affected by the electric field and the relative difference in capacitance between the object being touched and the electrodes will be used to measure the object\'s movement.

The system is calibrated using a calibration disk that is placed on the touch sensor. This disk measures the capacitance of the electrodes and is used to adjust the system’s sensitivity to the required range of capacitance. The calibration disk is also used to ensure that the system is properly aligned for accurate measurements.

The QT140-ASG is a simple, reliable and accurate capacitive touch sensing system. Its reliable performance and accuracy make it ideal for a variety of applications. Whether used in medical diagnostics, touch-sensitive input devices, robotic systems or domestic applications, the QT140-ASG capacitive touch sensing system is a highly effective and efficient way to measure the capacitance of an object.