IQS7222A001CSR

Overview

The IQS7222A001CSR is a ProxFusion sensor fusion controller from Azoteq, packaged in WLCSP-18. It supports up to 12 sensing channels, including self-capacitive, mutual capacitive, inductive, and Hall-effect sensors. The device operates on an I2C interface with Fast-Mode Plus support up to 1 MHz. Supply voltage ranges from 1.71 V to 3.5 V. Operating temperature spans -40°C to +85°C. The package dimensions are 3 mm x 3 mm x 0.5 mm.

Feature Summary

• Supports multiple sensing modalities including self-capacitive buttons, mutual capacitive touch/proximity, inductive elements, and Hall-effect detection within a single IC.
• Features ultra-low-power wake-up capabilities for proximity or touch events to optimize system power consumption.
• Includes built-in automatic tuning, noise filtering, and active environment tracking to ensure stable performance across varying conditions.

Applications

• Capacitive sliders and buttons for user interfaces
• Wear detection for wearable devices
• Hall-effect dock detection

Procurement Notes

Verify the specific ordering suffix CSR against the manufacturer's datasheet to confirm the WLCSP-18 package type and tape-and-reel packaging configuration. Ensure that the supply voltage and operating temperature ranges align with your system requirements before finalizing procurement.

Selection Notes

Select this component when a compact footprint is required due to the WLCSP-18 package. Consider the channel limitations of the WLCSP variant compared to the QFN20 version if more external sensor connections are needed. Verify compatibility with I2C master controllers supporting Fast-Mode Plus speeds.

Part Context

This part belongs to the IQS7222A series of ProxFusion controllers. It shares core functionality with other variants like IQS7222A102QFR but differs in package style (WLCSP vs QFN) and pin count availability. The '001' suffix typically denotes specific factory calibration or binning parameters defined by Azoteq.

Replacement Considerations

Direct replacements include other IQS7222A variants such as IQS7222A102QNR or IQS7222A102QFR, though these utilize a QFN20 package which requires different PCB footprints and pin mapping adjustments.