IQS7223C001QFR

Overview

The IQS7223C001QFR is a ProxFusion sensor fusion IC featuring four external sensor pad connections and an I2C interface. It supports mutual and self-capacitive touch, proximity, and dedicated wear detection. The device operates on a supply voltage of 1.71 V to 3.5 V with an operating temperature range of -40 °C to +85 °C. It utilizes a QFN20 package measuring 3 mm x 3 mm x 0.5 mm. Key electrical characteristics include an I2C clock frequency up to 1 MHz, HBM ESD rating of ±4000 V, and typical current consumption ranging from 8.5 µA in ULP mode to 199.3 µA in NP mode.

Feature Summary

• Dedicated Wear UI for long-term wear or presence detection
• Advanced environmental tracking for robust detection
• Automatic tuning and noise filtering capabilities
• Configurable GPIOs and low power options

Applications

• Fitness band & smartwatch wear detection
• Headphone wear detection
• TWS earbud wear detection

Procurement Notes

Verify the QFN20 package designation (QFR) against the specific PCB footprint requirements. Confirm that the I2C address matches the system design, as the hardware address is fixed at 0x56. Ensure the host MCU supports the required Fast Plus mode communication speeds for optimal event reporting.

Selection Notes

Select this model when a compact QFN20 form factor is required for wearable applications. It provides four sensing channels suitable for combined touch and proximity functions. Consider the WLCSP18 variant if board space constraints are more critical than thermal dissipation needs.

Part Context

This component belongs to the Azoteq IQ Switch ProxFusion series, designed for sensor fusion tasks. It integrates sensing engines with power management and I2C communication. The QFR suffix specifically denotes the QFN20 package type, distinguishing it from other package variants within the same functional family.

Replacement Considerations

IQS7223C001QNR is a verified substitute offering identical functionality in a QFN20 package. Verify pin compatibility and thermal pad specifications, as the QNR variant includes exposed pads while the QFR does not.