Precision Micropower Oscillators Offer 99.91% Accuracy
Portable Design News, Thursday August 07, 2008
Linear Technology has 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 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 105uA at 32 kHz and requiring only a single 1.7V to 5.5V 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 110usec.
Features of the LTC6930 include: Startup Time <110us at All Frequencies; 105uA Typical Supply Current at 32kHz; 490uA Typical Supply Current at 8MHz; Frequency Error <0.09%, Max @ 25°C; 1.7V to 5.5V Single Supply Operation; Typical RMS Period Jitter <0.15%; No External Components Required to Set Frequency; 5 Options Cover 32kHz to 8.192MHz; –40°C to 125°C Operating Temperature Range; Tiny 2mm × 3mm DFN or MS8 Package.
These parts are available in a compact 2x3mm DFN and an 8-lead MSOP package. All versions are in full production, with prices starting at $1.31 each in 1,000-piece quantities.
Linear Technology, Milpitas, CA (408) 432-1900 [www.linear.com]
