IQS318201QFR

Overview

The IQS318201QFR is a single-channel standalone inductive snap button controller from the Azoteq ProxFusion series. It operates on a supply voltage of 1.71 V to 3.5 V and features an internal 14 MHz CPU. The device supports configurable channel sensitivity, sampling period, threshold, and charge transfer frequency via external input pins. It includes automatic tuning, noise filtering, debounce, and hysteresis functions. The component is housed in a QFN20 package (3 × 3 × 0.55 mm) with a 0.4 mm pitch.

Feature Summary

• Supports standalone inductive snap button functionality without I2C interface requirements
• Integrates DYCAL™ 2 solution for dynamic calibration with intelligent hysteresis
• Features built-in automatic tuning, noise filtering, and debounce mechanisms
• Allows configuration of sensitivity, sampling period, and thresholds via external input pins

Applications

• General-use inductive snap buttons
• Wear detection systems
• Backlight activation controls
• Tamper switches requiring release detection

Procurement Notes

Verify the specific ordering suffix 'QFR' corresponds to the QFN20 package variant when sourcing. Confirm that the standalone mode configuration aligns with system design requirements, as I2C debugging interfaces require specific pull-up resistor configurations on Output/SDA and InputB/SCL pins.

Selection Notes

Select this model for applications requiring a single-channel inductive snap button response profile. Ensure the design accommodates the QFN20 footprint dimensions. Consider the power consumption characteristics relative to the chosen sampling period and active channel settings to meet battery life targets.

Part Context

This component belongs to the IQS318 ProxFusion family, which offers various interface options including I2C and standalone modes. The IQS318-2xx series specifically targets inductive snap button applications, distinguishing itself from other variants like the IQS318-0xx or IQS318-5xx which support different sensing modalities or user interfaces.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.