IQS7222C201QFR

Overview

The IQS7222C201QFR is a sensor fusion controller from the Azoteq ProxFusion series, designed for multi-channel sensing structures including button arrays, sliders, and wear detection pairs. It supports up to 10 mutual capacitive channels, 8 self-capacitive buttons, or 4 inductive elements. The device operates on a supply voltage of 1.71V to 3.5V with an I2C interface supporting speeds up to 1MHz. It features automatic tuning, noise filtering, and configurable GPIOs. The QFN20 package measures 3.00 x 3.00 x 0.55 mm with a 0.40mm pitch.

Feature Summary

• Supports multiple sensing modalities including mutual capacitance, self-capacitance, and inductive metal detection within a single integrated circuit.
• Integrates automated system power modes that optimize the balance between response speed and energy consumption through Normal, Lower Power, and Ultra-Low Power states.
• Includes built-in signal processing capabilities such as slider and wheel output generation, along with automatic tuning and reference tracking algorithms.

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 to confirm the QFN20 package type and tape-and-reel packaging configuration. Ensure compatibility with the required I2C address and check for RoHS2 compliance documentation before finalizing procurement specifications.

Selection Notes

Select this model when the design requires a combination of mutual capacitive touch, self-capacitive buttons, and inductive proximity sensing. Verify that the PCB layout accommodates the QFN20 footprint dimensions and thermal pad requirements specified in the datasheet.

Part Context

This component belongs to the IQS7222C family within the Azoteq IQ Switch ProxFusion series. It shares core firmware architecture and sensing algorithms with other variants like the IQS7222A and IQS7222B, differing primarily in channel count and package options.

Replacement Considerations

Direct pin-compatible replacements are limited due to specific channel configurations. Evaluate IQS7222A001QFR for designs requiring additional Hall effect sensing or different channel distributions, noting potential firmware adjustments.