IQS318501CSR

Overview

The IQS318501CSR is a single-channel standalone and I2C proximity or touch sensing controller from Azoteq's ProxFusion series. It supports self-capacitive sensing with the DYCAL™ 2 user interface for long-term activations. The device operates on a supply voltage of 1.71 V to 3.6 V and features automatic tuning, noise filtering, debounce, and hysteresis. Configuration is achieved via external input pins or I2C debugging interface up to Fast Mode Plus (1 MHz). It offers configurable channel sensitivity, sampling period, threshold, and charge transfer frequency.

Feature Summary

• Supports both standalone operation and I2C communication modes for flexible system integration.
• Integrates DYCAL™ 2 solution providing dynamic calibration UI with intelligent hysteresis for long-term detection.
• Includes built-in signal processing functions such as automatic tuning, noise filtering, debounce, and hysteresis.
• Allows configuration of sensitivity, sampling period, threshold, and charge transfer frequency using external input pins.

Applications

• Capacitive wear detection
• Lid open-close switches
• Backlight activation

Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to confirm package type and interface mode. Ensure compatibility with the required sensing application profile before procurement. Confirm availability through authorized distributors as stock levels fluctuate.

Selection Notes

Select this component for single-channel applications requiring either inductive or self-capacitive sensing. The IQS318-5xx series is appropriate for capacitive switches needing long-term activation capabilities. Consider the available packages (WLCSP11, DFN12, QFN20) based on board space constraints.

Part Context

This part belongs to the IQS318 ProxFusion series, which provides single-channel sensing controllers. The series includes variants for inductive switches, buttons, snap buttons, and capacitive switches. The IQS318-5xx sub-series specifically targets self-capacitive applications with integrated dynamic calibration.

Replacement Considerations

Direct replacements within the same family include other IQS318 order codes depending on the required sensing modality (inductive vs. capacitive) and interface (standalone vs. I2C). Verify pinout and functional equivalence for the specific application requirements.