QTouch AT42QT2120 from Atmel Corporation has a proximity sensing range of over 10 inches
(25cm), which Atmel claims is the touch controller marketís longest
proximity sensing range. A
longer sensing range enables a system to wake up as an object or
finger approaches the system. The system then turns on the backlight
or boots up when touch operation commences. The Atmel QT2120 is
targeted for applications in automotive, computing, consumer,
industrial, medical, and white and brown goods requiring proximity
Atmel QT2120 capacitive touch controller utilizes the QTouchADC
sensing algorithm to eliminate the need for external components,
lowering the overall system cost for the designer. This architecture
also delivers a faster scan time and lower current consumption for
applications that perform proximity scanning in standby mode.
All these features enable a superior touch interface in various
applications and longer proximity sensing performance.
and ATtiny40 AVR microcontrollers can also deliver a proximity
range of over 10 inches with QTouch
more information visit http://www.atmel.com/bsw.
Atmel QT2120 is available in production quantities. Pricing starts at
$1.12 for 1,000-piece quantities. To jump-start your design, the
Atmel EVK2120A evaluation kit (EV) will be available in December at the Atmel Store