32, 48, 64 KEY QMatrix™ KEYPANEL SENSOR ICS

The QT60325B, QT60485B, and QT60645B digital charge-transfer (“QT”) QMatrix™ ICs are designed to detect human touch on up to 32, 48, or 64 keys respectively using a scanned, passive X-Y matrix. It will project the keys through almost any dielectric, e.g. glass, plastic, stone, ceramic, and even wood, up to thicknesses of 5 cm or more. The touch areas are defined as simple 2-part interdigitated electrodes of conductive material, like copper or screened silver or carbon deposited on the rear of a control panel. Key sizes, shapes and placement are almost entirely arbitrary; sizes and shapes of keys can be mixed within a single panel of keys and can vary by a factor of 20:1 in surface area. The sensitivity of each key can be set individually via simple functions over the SPI port, for example via Quantum’s QmBtn program. Key setups are stored in an onboard eeprom and do not need to be reloaded with each power-up.

● Advanced second generation QMatrix controllers
● Up to 32, 48 or 64 touch keys through any dielectric
● Panel thicknesses to 5 cm or more
● 100% autocal for life - no adjustments required
● Keys individually adjustable for sensitivity, response time, and many other critical parameters
● Mix and match key sizes & shapes in one panel
● Passive matrix - no components at the keys
● Moisture suppression capable
● AKS™ - Adjacent Key Suppression feature
● Synchronous noise suppression
● Sleep mode with wake pin
● SPI Slave or Master/Slave interface to a host controller
● Low overhead communications protocol
● 44-pin TQFP package

APPLICATIONS
◆ Automotive panels
◆ Machine tools
◆ ATM machines
◆ Touch-screens
◆ Appliance controls
◆ Outdoor keypads
◆ Security keypanels
◆ Industrial keyboards