Analog Devices Inc. AD7873BRQZ Touch Screen Digitizer

The AD7873BRQZ is a high-performance touch screen digitizer from Analog Devices Inc., designed to interface with 4-wire resistive touch screens. This precision integrated circuit (IC) is an ideal choice for advanced touch screen solutions, providing accurate and reliable touch sensing capabilities for a wide range of applications, including personal digital assistants (PDAs), portable instruments, point-of-sale terminals, and other touch-enabled devices.

At the heart of the AD7873BRQZ is a 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) that ensures fast and precise touch location measurements. The device operates with a supply voltage ranging from 2.2V to 3.6V, making it suitable for use in battery-powered devices where power efficiency is critical. Additionally, the low power consumption of the AD7873BRQZ extends battery life, making it an economical choice for portable applications.

One of the key features of the AD7873BRQZ is its on-board controller, which handles the touch screen processing, reducing the workload on the host processor. This feature simplifies system design and allows for easier integration into existing applications. The IC also includes a built-in 2.5V reference that can be used for the ADC or external circuits, further streamlining the design process.

The AD7873BRQZ provides a serial interface compatible with SPI, QSPI, and MICROWIRE protocols, enabling seamless communication with most microcontrollers and microprocessors. The device comes in a compact 16-lead QSOP package, which is not only space-efficient but also easy to mount on a printed circuit board (PCB).

For developers and system integrators looking for a robust and versatile touch screen digitizer solution, the AD7873BRQZ from Analog Devices Inc. offers a perfect blend of performance, power efficiency, and ease of use. With its precision touch sensing and straightforward interfacing options, this component is set to be a valuable addition to any touch-enabled device.

Key Features:

• 4-wire touch screen interface
• 12-bit SAR ADC
• Low operating voltage: 2.2V to 3.6V
• Low power consumption
• On-board touch screen controller
• Built-in 2.5V reference voltage
• Serial interface (SPI/QSPI/MICROWIRE compatible)
• Compact 16-lead QSOP package