QT110-DG

Overview

The QT110-DG is a digital charge-transfer sensor IC designed for touch and proximity sensing applications. It operates on a single supply voltage ranging from 2.5V to 5V, with an average power consumption of less than 10µA at 2.5V. The device features a 14-bit resolution switched-capacitor ADC and includes built-in drift compensation and detection integration logic. It supports multiple output modes including DC, toggle, and pulse, and provides piezo acoustic drive capabilities. The component is housed in an 8-pin DIP package and is rated for an operating temperature range of 0°C to +70°C.

Feature Summary

• Self-contained digital signal processing with continuous auto-calibration
• Supports direct drive of piezo sounders for tactile feedback
• Includes HeartBeat health indicator for system monitoring
• Capable of 2-wire operation via pulse output mode

Applications

• Elevator buttons
• Consumer electronics control panels
• Access systems and security interfaces
• Appliance controls and light switches
• Industrial panels and pointing devices

Procurement Notes

Verify the specific suffix DG confirms the 0°C to +70°C industrial temperature rating and 8-pin DIP packaging. Confirm RoHS compliance status as older Microchip documentation may list non-compliant variants. Check for end-of-life notifications or discontinuation notices prior to finalizing procurement plans.

Selection Notes

Select this component for designs requiring low-power capacitive sensing without external active components. Ensure the application environment stays within the 0°C to +70°C range. Verify that the required gain settings and output modes (DC, toggle, or pulse) align with the strap pin configurations available on the DIP package.

Part Context

The QT110 belongs to the QTouch family of charge-transfer sensors developed by Quantum Research Group and distributed by Microchip Technology. This series focuses on robust human-machine interface solutions using simple electrode designs. The QT110-DG variant specifically denotes the commercial/industrial temperature grade packaged in a dual in-line format suitable through-hole mounting.

Replacement Considerations

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