QST108: Cap touch sensor suits user interface apps

 

The QST108 capacitive touch sensor uses a pure digital firmware-based solution that implements Quantum¡¯s patented and field-proven charge-transfer QProx capacitive technology and provides an intelligent single-chip control interface that responds to users¡¯ touch. The device allows users to create capacitive touch panels of up to eight keys for their product user interfaces, using conventional or flexible printed-circuit boards.

Housed in a 32-pin LQFP package, the QST108 drives up to eight LEDs and features PWM capability to drive a beeper output or to control LED brightness. Debounced touch detection results are accessible through individual outputs or through the I2C interface.