Linear Tech Offers Precision Micropower Oscillators With 99.91% Accuracy

Linear Technology announced the LTC6930, a family of low power precision silicon oscillators with fixed frequencies from 32.768 kHz to 8.192 MHz. Five versions are available, each with what is described as a unique master frequency and digitally controlled frequency dividers that give 8 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 is claimed to have significant advantages in battery and portable applications. Drawing only 105µA at 32 kHz and requiring only a single 1.7 to 5.5V supply, the LTC6930 can operate from two unregulated NiCad batteries. The company claims that battery life is also extended, using the fast startup, where minimal power is lost during the clock power-up. According to the company, most oscillators exhibit a startup time greater than a millisecond. By contrast, the LTC6930 has a startup time of less than 110µs.

The 0.09% 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 to 125°C and is said to offer rugged, reliable operation in environments unsuitable for crystal-based oscillators. These parts are available in a compact 2 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," said Doug LaPorte, Design Manager for Linear Technology.

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