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Micropower oscillators extend battery life

Posted: 25 Jun 2008     Print Version  Bookmark and Share

Keywords:silicon oscillators  fixed frequencies  master frequency  frequency dividers 

Linear Technology announces the LTC6930, a family of low power precision silicon oscillators with fixed frequencies from 32.768kHz to 8.192MHz.

Available in five versions, each comes with a master frequency and digitally controlled frequency dividers that give eight different frequencies per device. Frequency shifting is accomplished within a single clock cycle and without glitches, providing a powerful tool for system configuration or power management through clock-speed control.

The LTC6930 has significant advantages in battery and portable applications. Drawing only 105µA at 32kHz and requiring only a single 1.7-5.5V supply, the LTC6930 can operate from two unregulated NiCad batteries. Battery life is also extended, using the fast start-up, where minimal power is lost during the clock power-up. Most oscillators exhibit a start-up time greater than 1ms. By contrast, the LTC6930 has a guaranteed start-up time of less than 110µsec. The 0.09 per cent frequency tolerance makes the LTC6930 suitable for many applications, including serial port communications and microprocessor clocks. The LTC6930 is fully specified for operation from -40°C to 125°C and offers rugged, reliable operation in environments unsuitable for crystal-based oscillators. These parts are available in a compact 2mm x 3mm DFN and an 8-lead MSOP package.

"The LTC6930 combines the unique features of Linear Technology's silicon oscillators with next-generation frequency accuracy. Industrial and handheld devices will especially have an advantage with these clocks," says Doug LaPorte, design manager for Linear Technology.

All versions are in full production, with prices starting at Rs.52.43 ($1.31) each in 1,000-piece quantities.

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