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Touchscreen controllers with proximity sensing to 10cm

Posted: 12 Nov 2010 ?? ?Print Version ?Bookmark and Share

Keywords:touchscreen? controller? capacitive? proximity?

Semtech Corp. has added a line of capacitive touchscreen controllers to its product portfolio, boasting 10cm of proximity sensing, smaller footprint, and support for a wide range of button, slider and touch-wheel capacitive sensor panels.

The SX863x series is available in 8- and 12-channel versions. The long-range proximity sensing enables power-management and other convenience features such as system wake-up, LED wake-up and automatic backlight activation upon user detection. A wide range of button, slider and touch-wheel capacitive sensor panels, which are increasingly being built into white goods, mobile phones, media players, notebooks/netbooks, set top boxes and other consumer and industrial electronic products, can be supported.

Semtech SX863x

The SX863x platform devices include the 12ch SX8633, SX8634 and SX8635, which are available in 5x5mm 32-pad QFN packages, and the 8ch SX8636, SX8638 and SX8639, which come in 4x4mm 28-pad QFN packages. They are rated for a temperature range of -40C to +85C and are Pb-free, halogen-free and fully RoHS compliant.

Other key features include eight independent, 256-step LED drivers with auto-lightening mode and individual intensity and fading control; high-resolution capacitive sensing (able to sense through overlay materials >5mm thick); low power consumption; auto offset compensation that eliminates false triggers due to environmental factors; zero external components required for sensor input; and multi-time in-field programmable firmware parameters for flexibility.

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