IQS7222C202QFR

Overview

The IQS7222C202QFR is a sensor fusion controller from the Azoteq ProxFusion series, designed for multi-channel sensing structures including button arrays, sliders, and wear detection. It supports up to 10 mutual capacitive channels and 8 self-capacitive channels, along with inductive touch and proximity sensing capabilities. The device operates on a supply voltage range of 1.71 V to 3.5 V and features an I2C interface supporting speeds up to 1 MHz. It is housed in a QFN20 package measuring 3.00 x 3.00 mm with a 0.40 mm pitch.

Feature Summary

• Supports flexible configurations of mutual capacitive, self-capacitive, and inductive sensors for diverse user interface applications.
• Integrates automatic tuning and re-tuning algorithms to maintain performance across varying environmental conditions and electrode capacitances.
• Provides multiple power modes including normal, lower power, and ultra-low power to optimize system energy consumption.
• Includes built-in signal processing for slider and wheel outputs with gesture calculation support.

Applications

• Wear detection systems for wearable devices
• Waterproof buttons utilizing inductive sensing technology
• Appliance user interfaces featuring sliders, wheels, and buttons

Procurement Notes

Verify the specific ordering suffix QFR confirms the QFN20 package type and tape-and-reel delivery format. Confirm that the component meets RoHS2 compliance requirements for your manufacturing process. Ensure the design accommodates the recommended external capacitor values for VREGA and VREGD pins as specified in the datasheet electrical characteristics.

Selection Notes

Select this model when the application requires simultaneous support for mutual capacitive, self-capacitive, and inductive sensing modalities. The QFN20 package offers more external sensor pad connections compared to the WLCSP18 variant, allowing for higher channel counts. Consider the I2C interface compatibility and available GPIO pins for system integration needs.

Part Context

This component belongs to the IQS7222 family within the IQ Switch ProxFusion series. It shares core sensing architecture with variants like the IQS7222B but differs in supported sensor types and channel configurations. The IQS7222C specifically enables inductive metal detection alongside traditional capacitive touch solutions.

Replacement Considerations

The IQS7222C102QFR is a related variant within the same family. Verify if the reduced channel count or different sensor configuration of alternative models meets the specific application requirements before substitution.