QT60326-ASG

The QMatrix devices are digital burst mode charge-transfer (QT) sensors designed specifically for matrix geometry touch controls; they include all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions. Only a few external parts are required for operation. The entire circuit can be built within a few square centimeters of single-sided PCB area. CEM-1 and FR1 punched, single-sided materials can be used for possible lowest cost. The PCB’s rear can be mounted flush on the back of a glass or plastic panel using a conventional adhesive, such as 3M VHB 2-sided adhesive acrylic film. QMatrix devices allow for a wide range of key sizes and shapes to be mixed together in a single touch panel. The actual internal pattern style is not as important as is the need to achieve regular X and Y widths and spacings of sufficient size to cover the desired graphical key area or a little bit more; 2mm overhand is acceptable in most cases, since the fields drop off near the edges anyway. The overall key size can range from 10mm x 10mm up to 100mm x 100mm. The keys can be any shape including round, rectangular, square, etc.

• Advanced second generation QMatrix™ controller
• Keys individually adjustable for sensitivity, response time, and many other critical parameters
• Panel thicknesses to 50mm through any dielectric
• 32 key versions
• 100% auto cal for life - no in-field adjustments
• SPI Slave and UART interfaces
• Sleep mode with wake pin
• Adjacent key suppression feature
• Synchronous noise suppression pin
• Spread-spectrum modulation: high noise immunity
• Mix and match key sizes & shapes in one panel
• Low overhead communications protocol
• FMEA compliant design features
• Negligible external component count
• Extremely low cost per key
• 44-pin Pb-free TQFP package