QT160-AS Integrated Circuits (ICs)

QT160-AS is a capacitive touch sensing integrated circuit designed in recent years. Its application and working principle are very important in electronic product design. This article will briefly introduce the application field and working principle of QT160-AS.

Application fields of QT160-AS

QT160-AS is a one-Chip type integrated circuit specially designed for capacitive touch sensing. It has a wide range of applications in the following areas:

• Home Appliance: Premium home appliances such as air conditioners, electric stoves and digital cameras.
• Consumer Electronics: Wearable smart devices, mobile phones, tablets, etc.
• Industrial Equipment: Robots, automatic control equipment, industrial equipment, etc.
• Others: Game controllers, fax machines, scanners, etc.

The QT160-AS is capable of reliably detecting the presence of two electrodes with different capacitance values, allowing for various types and sizes of touchpad designs. It is suitable for both embedded and non-embedded systems and can be used in various applications.

Working principle of QT160-AS

QT160-AS is based on the principle of capacitive touch sensing. A capacitive touch sensor consists of a sensing electrode and a sensing signal electrode. When a conducting object touches the sensing electrode, a current will flow between the electrodes, and the capacitance of the electrodes will change accordingly. QT160-AS uses a drive circuit and a detection circuit to detect the change in capacitance. It then converts the current into a sensing signal, which can be used to detect the presence of a conducting object.

The drive circuit in QT160-AS consists of an oscillator, a switch, and two capacitors. The oscillator generates an alternating electric signal and charges the capacitors through the switch. The detection circuit captures and amplifies the voltage drop across the capacitors. If a conducting object is brought close to the electrodes, the voltage drop will change and the circuit will detect this change. This change is then converted into a sensing signal which can be used to detect the presence of the object.

QT160-AS is a low voltage integrated circuit capable of operating at a supply voltage ranging from 2.2V to 3.6V. It features a quiescent current of less than 0.1mA and requires a minimum detection force of 2N. It also has excellent dust, moisture and chemical resistance, making it ideal for use in harsh environments.

Conclusion

QT160-AS is an integrated circuit specifically designed for capacitive touch sensing. It is suitable for various applications in home appliances, consumer electronics, industrial equipment, and more. The working principle of QT160-AS is based on the principle of capacitive touch sensing. It consists of a drive circuit and a detection circuit that detect the change in capacitance when a conducting object is brought close to the electrodes. It is able to operate at low voltage and has excellent dust, moisture and chemical resistance.