AD7879WARUZ-RL Touch Screen Controller by Analog Devices Inc.

The AD7879WARUZ-RL, manufactured by Analog Devices Inc., is a highly efficient touch screen controller that has been designed to cater to the needs of various touch screen applications. This sophisticated device is capable of interfacing with 4-wire resistive touch screens, providing precise and reliable performance for a wide range of products including smartphones, personal digital assistants (PDAs), and portable navigation devices.

At the heart of the AD7879WARUZ-RL is a 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) which ensures high-resolution touch screen data is captured with accuracy and speed. This feature enables the touch screen to detect even the slightest touch with precision, enhancing the user experience significantly.

The device operates on a 2.2 V to 3.6 V power supply, making it an energy-efficient solution for battery-powered applications. Its low power consumption is a critical feature that helps to extend the battery life of portable devices. The AD7879WARUZ-RL also offers an on-chip 2.5 V reference that can be used for the auxiliary ADC inputs, touch screen driver, and battery monitor functions, providing further integration and space-saving advantages.

One of the key features of the AD7879WARUZ-RL is its I<sup>2C-compatible serial interface, which simplifies the connection to a host processor. It also includes an on-chip temperature sensor and four auxiliary ADC inputs, which allow the controller to perform additional monitoring tasks beyond touch screen control. This multi-functionality makes the device an ideal choice for complex applications that require more than just touch input.

The AD7879WARUZ-RL comes in a compact 16-lead TSSOP package, which is ideal for space-constrained applications. Its robust design ensures reliable operation over a wide temperature range of -40°C to +85°C, making it suitable for use in a variety of environmental conditions.

Overall, the AD7879WARUZ-RL from Analog Devices Inc. is a versatile and reliable touch screen controller that offers high-resolution touch sensing, low power consumption, and multiple additional features, all of which contribute to enhancing the functionality and user experience of touch-enabled devices.