Introduction
The AT42QT1060 (QT1060) is a digital burst mode charge-transfer (QT™) capacitive sensor driver designed specifically for mobile phone applications. The device can sense from two to six keys; up to four keys can be disabled by not installing their respective sense capacitors (Cs). It also has up to seven configurable input/output lines, with Pulse Width Modulation (PWM) for LED driving.

This device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions, and the outputs are fully debounced. Only a few external parts are required for operation.

The QT1060 modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise, and to suppress RF emissions.