QT110-ISG

Overview

The QT110-ISG is a digital charge-transfer sensor IC from Microchip Technology's QTouch series, designed for touch and proximity sensing applications. It operates on a single supply voltage ranging from 2.5V to 5.5V with an average current consumption of 26µA. The device features a 14-bit resolution ADC and supports up to one input channel within an 8-SOIC package. It functions across an industrial temperature range of -40°C to +85°C and includes built-in drift compensation and self-calibration capabilities.

Feature Summary

• Self-contained digital processing with continuous auto-calibration for stable sensing under varying environmental conditions
• Capable of projecting sense fields through various dielectric materials such as glass, plastic, stone, ceramic, and wood
• Includes toggle mode for on/off control and pulse output mode for simple two-wire interface communication
• Features HeartBeat health indicator signal for continuous monitoring of sensor operational status

Applications

• Elevator buttons
• Consumer electronics interfaces
• Access systems and security panels
• Appliance control switches
• Light switches and industrial panels

Procurement Notes

Verify the specific ISG suffix indicates the extended industrial temperature range (-40°C to +85°C) compared to commercial variants. Confirm component availability status as distribution data may indicate end-of-life or discontinuation phases. Ensure ordering documentation matches the exact 8-SOIC package requirements for your PCB layout.

Selection Notes

Select this component when a single-channel capacitive touch solution with low power consumption is required. The ISG variant is appropriate for environments requiring operation below 0°C. Ensure the application allows for the necessary electrode design guidelines regarding ground plane separation and stray capacitance management to maintain optimal sensitivity.

Part Context

This part belongs to the QTouch family of charge-transfer sensor ICs developed by Quantum Research Group and manufactured by Microchip Technology. It serves as a foundational component for replacing mechanical switches in human-machine interfaces, offering a cost-effective alternative to more complex multi-channel controllers while maintaining high reliability.

Replacement Considerations

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