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Precision Micropower Oscillators Offer 99.91% Accuracy

Linear Technology announces 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.

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.

"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.

 Silicon Oscillator Offers 99.91% Accuracy

Summary of Features: LTC6930
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:
    - LTC6930-4.19: 32.768kHz to 4.194MHz
    - LTC6930-5.00: 39.1kHz to 5.000MHz
    - LTC6930-7.37: 57.6kHZ to 7.373MHz
    - LTC6930-8.00: 62.5kHz to 8.000MHz
    - LTC6930-8.19: 64.0kHz to 8.192MHz
–40°C to 125°C Operating Temperature Range
Tiny 2mm × 3mm DFN or MS8 Package


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