IQS323001QFR

Overview

The IQS323001QFR is a sensor fusion controller from the Azoteq ProxFusion series, designed for single and dual-channel sensing requirements. It supports 3 external sensor pad connections configurable as self-capacitive, mutual-capacitive, or inductive sensors. The device features an I2C interface with a Ready Indicator supporting up to Fast Plus mode (1 MHz). Operating voltage ranges from 1.71 V to 3.6 V, with a recommended operating range of 1.71 V to 3.5 V. It operates within a temperature range of -40°C to +85°C. The component is housed in an 11-WLCSP package measuring 1.48 x 1.08 x 0.345 mm.

Feature Summary

• Configurable multi-mode sensing supporting self-capacitive buttons, mutual-capacitive touch/proximity, and inductive sensors on shared pins.
• Integrated signal processing including automatic tuning, noise filtering, debounce, hysteresis, and on-chip gesture recognition for sliders.
• Multiple user interface options including Reference, Release, and Movement UIs for flexible interaction logic.
• Distributed ultra-low power modes optimized for rapid wake-up events while maintaining low consumption during idle states.

Applications

• TWS earphones
• Wear detection pairs
• Waterproof buttons using inductive sensing
• Low power wake-up buttons and proximity sensors
• Watches and fitness bands

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet revision to confirm package type and pre-loaded firmware interface. Confirm availability status as distribution channels may report limited stock or discontinuation notices. Ensure the selected variant matches the required hardware configuration for the target application design.

Selection Notes

Select this component when a compact solution is needed for mixed sensing modalities like capacitive touch and inductive proximity. The WLCSP11 package is suitable for space-constrained designs such as wearables. Evaluate power mode requirements against the available Normal, Low Power, Ultra-Low Power, and Halt modes to optimize battery life.

Part Context

This part belongs to the IQS323 ProxFusion series, which integrates sensing engine capabilities with communication interfaces. The 'Q' suffix typically denotes a specific package variant or qualification level within the Azoteq lineup. It serves as a bridge between physical sensors and host microcontrollers via standard I2C protocols.

Replacement Considerations

Check for direct substitutes within the IQS323 family with different package options like DFN12 or QFN20 if pin compatibility allows. Verify firmware compatibility if replacing with other IQ Switch controllers, as register maps may differ across series generations.