IQS228AS-00000000-TSR Integrated Circuits (ICs)

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Capacitive-touch sensors are widely used in electronic devices to detect objects, such as our fingertips. There are two main types of capacitive-touch sensors: mutual capacitive touch and self-capacitive touch. Mutual capacitive-touch sensors have two separate electrodes, one for sense and one for return, while self-capacitive touch sensors require only one electrode for sense and another for return. The IQS228AS-00000000-TSR is a self-capacitive touch sensor that does not require an external active electronics or firmware and will detect changes in capacitance signal caused by any objects that has a different dielectric constant from air. It supports both mutual capacitance and self-capacitance measurements.

The IQS228AS-00000000-TSR has two sense electrodes and two return electrodes. The sense electrodes convert the capacitance signal changes into voltage changes, while the return electrodes provide the bias needed to enable voltage measurement. This sensor operates on a low-level input signal, making it ideal for power-sensitive applications. It also has an ESD (electrostatic discharge) protection that prevents any damage to the sensor caused by electrical overstress. The IQS228AS-00000000-TSR supports capacitance ranges between 10fF and 500fF.

The IQS228AS-00000000-TSR application field includes capacitive-based touch switches, capacitive-based proximity detection, capacitive-based water level detection, capacitive-based fingerprint recognition and many more. It is designed for industrial, medical and consumer applications. The IQS228AS-00000000-TSR is commonly used in automotive and aircraft industry for sensing engine speed and operating temperature, as well as in medical field for detecting changes in pressure, temperature and humidity inside the body. It is also used in consumer products such as mobile phones, tablets, laptops and various smart devices.

The working principle of the IQS228AS-00000000-TSR is based on the electromagnetic field principle, where an object with a different dielectric constant than air affects the capacitance between two electrodes. When the object is brought near to the electrodes, the capacitance changes and the corresponding voltage value is generated. This voltage value is read by the microcontroller and the appropriate action is done with the device. Depending on the application, the voltage measured can be used to detect motion, proximity, finger touches, etc.

The IQS228AS-00000000-TSR capacitive-touch sensor is a robust and reliable solution for various types of touch sensing applications. It is easy to integrate into existing systems and has a wide operating range. The design of the IQS228AS-00000000-TSR ensures reliable operation and robust performance, making it a good choice for applications where accuracy, stability and reliability are required.

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