Guard channel feature and low voltage operation makes device ideal for portable products
The AT42QT1060 is designed for use in portable electronics products. An inbuilt capacitive guard channel feature helps prevent false triggering, for example, where moisture is an issue. This feature also prevents against erroneous commands that can occur when devices such as MP3 players are carried in a pocket, or in the case of a cellular phone, when it is held against the ear. The highly integrated AT42QT1060 reduces component count, cutting design complexity and cost, and enabling faster product development.
The sensor chip is based on Quantum's patented QTouch(TM) charge-transfer sensing method. This robust technology uses spread-spectrum modulation to achieve high immunity to electrical noise and a patented technique -- Adjacent Key Suppression(TM) (AKS(TM)) -- ensures that only the intended key is activated by the touch of a finger. The guard channel feature uses AKS(TM) to eliminate false triggering of nearby keys. Long-term reliability is ensured because the device automatically re-calibrates on power-up, compensating for build-up of moisture or other contaminants on the touch surface. Individual key sensitivity is host-selectable.
A host wake up function allows the host to sleep and be woken up when a user triggers the corresponding input, providing another power-saving feature. Additional GPIO expansion can be achieved by the use of spare IC pins.
The AT42QT1060 functions through any insulating panel including glass or plastic up to 3mm thick. Electrodes can be made from copper, silver, carbon, indium tin oxide (ITO) or Orgacon conductive ink and must be 6 x 6mm or larger. Widely different electrode sizes and shapes are possible, giving the product designer great flexibility in tailoring the user interface.
Availability and Pricing
Samples of the AT42QT1060 are available now in a space-saving 4mm x 4mm package. The device is priced at $0.89 in quantities of 100,000 units per year. A demonstration board is also available.
Atmel is a worldwide leader in the design and manufacture of microcontrollers, advanced logic, mixed-signal, nonvolatile memory and radio frequency (RF) components. Leveraging one of the industry's broadest intellectual property (IP) technology portfolios, Atmel is able to provide the electronics industry with complete system solutions focused on consumer, industrial, security, communications, computing and automotive markets.
With its new touch technology division, formerly known as Quantum Research Group, the company now offers dedicated touch sense controllers addressing applications in the mobile communication and entertainment markets as well as in PC, appliances and automotive applications.
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For further details about this and other Atmel touch sense products, please visit http://www.qprox.com.
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