CDC Boosts Touch Sensitivity

July 2, 2007
Promising improved responsiveness in user interface controls, the AD7147 capacitance-to-digital converter (CDC) allows users to quickly add responsive user controls such as scroll wheels and touch pads to portable products. The device features 13

Promising improved responsiveness in user interface controls, the AD7147 capacitance-to-digital converter (CDC) allows users to quickly add responsive user controls such as scroll wheels and touch pads to portable products. The device features 13 capacitance inputs with femto-Farad resolution, allowing users to implement up to 36 buttons per device. Integrated active shield technology protects the chip from capacitance-to-ground pickup and other noise sources. Improvement to its analog front-end yields a threefold improvement in sensor response compared to previous AD714x devices. The AD7147 typically consumes 1 mA in full power mode, 50 µA in low-power mode, and 2 µA in shutdown. The AD7147 includes a SPI-compatible interface while the AD7147-1 provides an I2C interface. Both devices are sampling now and will be available in full production quantities in July. Price is $1.30 each/1,000. ANALOG DEVICES, INC., Norwood, MA. (800) 426-2564.

Company: ANALOG DEVICES, INC.

Product URL: Click here for more information

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