QT161-AS

Overview

The QT161-AS is a six-channel digital charge-transfer sensor IC designed for touch and proximity detection. It operates on a single supply voltage ranging from 3V to 5.5V with a maximum current consumption of 5mA. The device features six independent channels, each requiring only one external sample capacitor per channel. It includes built-in signal processing algorithms for drift compensation and noise rejection. The component supports DC and toggle output modes and offers an auto-recalibration timeout feature configurable via strap options.

Feature Summary

• Six independent channels capable of detecting touch or near-proximity through various dielectric materials
• Built-in drift compensation and consensus filtering for stable operation under environmental changes
• Configurable Max On-Duration timer to prevent stuck key conditions
• Active-high outputs capable of sourcing 1mA and sinking 5mA

Applications

• Instrument panels
• Gaming machines
• Access systems
• Appliance controls
• Security systems

Procurement Notes

Verify the specific ordering suffix to confirm the operating temperature range and package type. Ensure the selected variant matches the required thermal specifications for the target application environment. Confirm pinout compatibility during integration, as different packages may have distinct layouts.

Selection Notes

Select this component for applications requiring robust capacitive sensing without complex microcontroller intervention. Consider the QT160 if adjacent key suppression is necessary for tightly spaced keys. Evaluate the need for toggle mode versus DC mode based on the control logic requirements of the end product.

Part Context

The QT161 belongs to the QProx family of charge-transfer sensor ICs developed by Quantum Research Group. These devices utilize proprietary signal processing techniques to provide high sensitivity and reliability in human-machine interfaces. The series is designed to replace mechanical switches in various consumer and industrial electronics.

Replacement Considerations

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