IQS323A01DNR

Overview

The IQS323A01DNR is a ProxFusion sensor fusion controller from Azoteq, 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 3.5 V. Key capabilities include automatic tuning, noise filtering, differential measurements, debounce, hysteresis, and distributed ultra-low power modes. It integrates touch, proximity, slider, and gesture outputs with on-chip gesture recognition.

Feature Summary

• Configurable multi-mode sensing supporting self-capacitive buttons, mutual capacitive touch/proximity, and inductive sensors.
• Integrated signal processing including automatic tuning, noise filtering, and differential reference measurements.
• Advanced user interface options such as slider output, gesture recognition, and movement detection.
• Flexible power management with Normal, Low Power, Ultra-Low Power, and Halt modes for optimized consumption.

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 'DNR' against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with the required I2C interface levels and supply voltage range of 1.71 V to 3.5 V. Confirm that the selected variant matches the intended sensing configuration, such as self-capacitive or inductive modes, as defined in the datasheet.

Selection Notes

Select the IQS323A01DNR when a flexible sensor fusion solution is required for compact designs. It is suitable for applications needing multiple sensing modalities like touch, proximity, and inductive detection within a single IC. Consider its low power options if battery life is critical. Verify that the WLCSP11 package dimensions fit the PCB layout constraints.

Part Context

The IQS323 belongs to Azoteq's ProxFusion series, which combines capacitive and inductive sensing technologies. This series is engineered for high sensitivity and low power consumption, making it ideal for wearable electronics and small form-factor devices. The IQS323 specifically offers three channel inputs, allowing for versatile configurations compared to simpler single-channel controllers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's obsolescence notices or application notes for potential cross-references if discontinuation occurs.