LTC6930 µPower Oscillators

Analog Devices' LTC6930 family of low power precision silicon oscillators with fixed frequencies from 32.768 kHz to 8.192 MHz. Five versions are available, each with 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 has significant advantages in battery and portable applications.

Drawing only 105 µA at 32 kHz and requiring only a single 1.7 V to 5.5 V supply, the LTC6930 can operate from two unregulated NiCad batteries. Battery life is also extended, using the fast startup, where minimal power is lost during the clock power-up. Most oscillators exhibit a startup time greater than a millisecond. By contrast, the LTC6930 has a guaranteed startup time of less than 110 usec. 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°C to +125°C and offers rugged, reliable operation in environments unsuitable for crystal-based oscillators. These parts are available in a compact 2 mm x 3 mm DFN and an 8-lead MSOP package.