QT110-IS

Overview

The QT110-IS is a digital charge-transfer touch sensor IC from the QProx series, manufactured by Microchip Technology. It operates on a single supply voltage ranging from 2.5V to 5.5V with a typical current consumption of 26µA. The device features a 14-bit resolution and supports one input channel for detecting near-proximity or touch through dielectric materials. It is housed in an 8-SOIC package (3.90mm wide) and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Self-contained digital processing with continuous autocalibration
• Capacitive sensing through various dielectric overlays
• Integrated drift compensation and detection integrator
• Configurable output modes including toggle and pulse

Applications

• Elevator buttons
• Toys & games
• Access systems
• Pointing devices
• Appliance control

Procurement Notes

Verify component authenticity using official Microchip documentation. Confirm that the specific ordering suffix matches the required gain and output configuration. Ensure environmental compliance requirements align with project specifications before finalizing procurement.

Selection Notes

Select this component for applications requiring low-power capacitive touch sensing. Evaluate electrode design against the specified capacitance limits. Consider the active-low output characteristic when interfacing with host controllers. Verify power supply stability to prevent sensitivity shifts during load switching.

Part Context

This part belongs to the QProx family of charge-transfer sensors. It shares core signal processing algorithms with related models like the QT110H and QT111. The primary distinction lies in the specific output polarity and option pin configurations defined by the IS suffix.

Replacement Considerations

QT110H-IS offers identical functionality with active-high logic instead of active-low.