AD7873ARQZ-REEL Touch Screen Digitizer

The AD7873ARQZ-REEL is a high-performance touch screen digitizer from Analog Devices Inc., a leader in high-performance semiconductors. This precision device is designed to interface with 4-wire resistive touch screens, providing accurate and reliable touch sensing capabilities for a wide range of applications.

The AD7873 operates from a single 2.2 V to 5.25 V power supply, making it suitable for use in both portable devices and fixed systems. It features a 12-bit successive approximation ADC with a synchronous serial interface, ensuring high-resolution touch screen data is captured with precision and speed. The onboard controller can track touch pressure, X and Y position coordinates, and also has an auxiliary input channel for additional interfacing options.

This digitizer comes in a compact 16-lead QSOP (Quarter Size Outline Package) and is part of the product reel, hence the 'REEL' designation in the product name, indicating its packaging type suitable for automated manufacturing processes. The AD7873ARQZ-REEL is optimized for battery-powered applications due to its low power consumption, featuring a sleep mode to further reduce power usage when the touch screen is inactive.

Key features of the AD7873ARQZ-REEL include:

• On-chip 2.5 V reference
• Direct battery measurement (0 V to 6 V)
• Touch-pressure measurement
• Pen-down detection
• 4-wire touch screen interface
• 12-bit SAR ADC
• Single-supply operation: 2.2 V to 5.25 V
• Low power consumption with automatic power-down

The AD7873ARQZ-REEL is ideal for portable devices such as personal digital assistants (PDAs), smartphones, GPS receivers, and other devices requiring reliable touch input. Its robust design and advanced features ensure that it can meet the stringent requirements of modern touch screen applications, providing designers with a versatile and efficient solution for integrating touch screen functionality into their products.