AD7879-1WARUZ-RL

Overview

The AD7879-1WARUZ-RL is a 12-bit successive approximation analog-to-digital converter (SAR ADC) designed for resistive touch screen applications. It features an I²C serial interface and operates on a single supply voltage ranging from 1.6 V to 3.6 V. The device achieves a throughput rate of 105 kSPS with low power consumption, drawing less than 6 μA in shutdown mode. It integrates a preprocessing block containing median and averaging filters to reduce noise. The component includes auxiliary inputs for battery monitoring or general-purpose use, temperature sensing capabilities, and touch pressure measurement functions.

Feature Summary

• 12-bit SAR ADC with 105 kSPS throughput rate
• I²C compatible serial interface (AD7879-1 variant)
• Integrated median and averaging filters for noise reduction
• Single 1.6 V to 3.6 V power supply operation

Applications

• Personal digital assistants
• Smart handheld devices
• Touch screen monitors
• Point-of-sale terminals
• Medical devices
• Cell phones

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and interface configuration. Ensure compatibility with the target system's I²C bus timing specifications, which support clock frequencies up to 400 kHz. Confirm that the operating environment remains within the specified -40°C to +85°C temperature range for guaranteed performance.

Selection Notes

Select this component when a low-voltage, high-resolution touch controller with I²C connectivity is required. The AD7879-1 variant is distinct from the SPI-based AD7879 due to its I²C interface. Consider the integrated battery monitor and GPIO capabilities if ancillary signal processing is needed without additional external components.

Part Context

This part belongs to the AD7879/AD7889 family of low-voltage touch screen controllers. The 'AD7879-1' designation specifically indicates the inclusion of an I²C interface, whereas the standard AD7879 utilizes an SPI interface. The 'W' suffix typically denotes the WLCSP package option available for this series.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.