IQS318100QFR

Overview

The IQS318100QFR is a single-channel standalone and I2C proximity or touch sensing controller from the Azoteq ProxFusion series. It supports inductive button applications with single-level trigger functionality. The device operates on a supply voltage ranging from 1.71 V to 3.5 V and features an I2C interface supporting up to Fast Mode Plus (1 MHz). It is housed in a QFN-20 package measuring 3 mm x 3 mm x 0.55 mm. The operating temperature range spans from -40°C to +85°C.

Feature Summary

• Supports single channel I2C or standalone inductive button operation with single level trigger capability
• Integrates automatic tuning, noise filtering, debounce, and hysteresis functions
• Allows configurable channel sensitivity, sample period, threshold, and charge transfer frequency via external input pins
• Includes built-in signal processing for single I2C touch/proximity output

Applications

• General-use inductive buttons that recover automatically after harsh environment latching
• Wear detection systems
• Backlight activation controls
• Tamper switches requiring release detection

Procurement Notes

Verify the specific order code suffix against official documentation to confirm the exact functional configuration, as different suffixes within the IQS318 family support distinct user interfaces such as DYCAL™ 2 or snap button algorithms. Ensure compatibility with the required sensor pad connection type before procurement.

Selection Notes

Select this component for applications requiring a single-channel solution for either inductive or capacitive sensing. Consider the QFN-20 package if board space allows for easier handling compared to WLCSP options. Verify that the system power supply falls within the 1.71 V to 3.5 V range and that I2C pull-up requirements are met for debugging modes.

Part Context

This part belongs to the IQ Switch ProxFusion series by Azoteq. The IQS318 family provides flexible sensing solutions for various industrial and consumer applications. The IQS318100QFR specifically targets inductive button implementations, distinguishing itself from other variants like the IQS318000 which supports long-term activation switches.

Replacement Considerations

Direct replacements within the same family include IQS318100CSR (DFN12 package) or IQS318100QFN (if available in alternative QFN variants). Cross-family replacement requires careful evaluation of pinout compatibility and sensing algorithm differences between ProxFusion and ProxSense series.