AT42QT1244-AU

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AT42QT1244-AU Application Field and Working Principle

The AT42QT1244-AU is a highly integrated capacitive touch controller chip offered by Atmel that supports up to 24 touch keys. It features a user-friendly, compact design with its advanced auto-calibration technology, low power consumption and robust protection against parallel metal plates. This controller chip is ideal for use in many applications, such as automotive human-machine interface (HMI), industrial and home appliances, medical and home automation devices.

Features of the AT42QT1244-AU

• Advanced auto-calibration technology - This technology allows the device to automatically calibrate the touch keys, ensuring reliable operation. There is no manual calibration required.
• Low power consumption - The low power consumption makes the chip ideal for applications where power is limited, such as battery-powered devices.
• Robust protection - The chip offers robust protection against parallel metal plates.
• Compact design - The device comes in a user-friendly, compact design, making it ideal for many applications.
• Supports up to 24 touch keys - The chip can support up to 24 touch keys.

Application Field

The AT42QT1244-AU is suitable for applications where a low-power touch sensing solution is required, such as in automotive HMI, industrial and home appliances, medical and home automation devices. The device is particularly well suited for applications where the keys have to be placed in close proximity to each other, such as a car radio or audio device.

The device is a cost-effective solution for automotive HMI applications, offering a combination of low power consumption and reliable operation. It is also suitable for medical devices, such as glucose meters, where the device offers high accuracy and robust protection against parallel objects. The device is also suitable for industrial and home appliances, where its low power consumption is critical.

Working Principle

The AT42QT1244-AU uses a patented technology called Charge-integration Acquisition. This technology allows the device to measure the change in capacitance by integrating the charge, which is delivered to a capacitive object connected to the touch sensor. This enables the device to detect small changes in capacitance, which allows for more accurate measurement of the touch signal.

The chip is also equipped with advanced auto-calibration technology that allows the device to automatically calibrate the touch keys. When the touch sensor is activated, the chip automatically calibrates all the touch keys, ensuring reliable and accurate operation. This eliminates the need for manual calibration and ensures that all the touch keys are correctly calibrated.

The device also features low power consumption, making it ideal for applications where power is limited. The chip also offers robust protection against parallel metal plates and has an operating temperature range of -40°C to +125°C, which makes it suitable for use in harsh environments.

The AT42QT1244-AU is an ideal solution for automotive HMI, industrial and home appliance, medical, and home automation device applications, offering a combination of low power consumption, advanced auto-calibration technology, and robust protection against parallel objects.

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