QT113-ISG

Overview

The QT113-ISG is a digital charge-transfer touch sensor IC designed for proximity and touch detection. It operates on a single supply voltage ranging from 2.5V to 5.5V with a typical current consumption of 600µA. The device features a 14-bit resolution ADC and includes internal signal processing for drift compensation and noise immunity. It supports toggle mode for on/off control and provides a HeartBeat health indicator output. The component is housed in an 8-pin SOIC package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Projects a proximity sense field through air or dielectric materials
• Includes a consensus filter requiring three consecutive detections before activation
• Features 100% autocalibration for life without manual adjustments
• Provides option-selectable toggle mode for on/off control

Applications

• Elevator buttons
• Consumer devices
• Access systems
• Pointing devices
• Appliance control

Procurement Notes

Verify the specific suffix ISG to confirm the industrial temperature grade (-40°C to +85°C) and SOIC package type. Ensure strap pins OPT1 and OPT2 are tied to defined logic levels rather than left floating, as floating inputs cause excess power drain and prevent proper option reading during power-up.

Selection Notes

Select this component when a self-contained solution for touch or proximity sensing is required under varying environmental conditions. It is suitable for applications where mechanical switches are undesirable. Consider the gain settings and strap options for timeout durations when designing the interface logic.

Part Context

The QT113 belongs to the QProx family of charge-transfer sensors developed by Quantum Research Group and later acquired by Microchip Technology. This technology utilizes burst-mode charge transfer cycles to achieve stable sensing with low power consumption and high noise immunity compared to older capacitive technologies.

Replacement Considerations

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