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LTC6905

Analog Devices

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LTC6905
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ANALOG DEVICES
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The LTC6905 precision, programmable silicon oscillator is easy to use and occupies very little board space. It requires only a single resistor to set the output frequency from 17MHz to 170MHz with a typical frequency error of 0.5% or less.

The LTC6905 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. Operation is simple: A single resistor, RSET, between 10K to 25K is used to set the frequency, and an internal three-state divider (DIV input) allows for division of the master clock by 1, 2 or 4, providing three frequencies for each RSET value.

The LTC6905 features a proprietary feedback loop that linearizes the relationship between RSET and frequency, eliminating the need for tables to calculate frequency. The oscillator can be easily programmed using the simple formula outlined below:

See first page of Data Sheet for formula

For higher accuracy, fixed frequency versions that include

an internal frequency-setting resistor, see the LTC6905-XXX Series datasheet.

* High Frequency Precision Oscillator

* High Speed Data Bus Clock

* Fixed Crystal Oscillator Replacement

* Ceramic Oscillator Replacement

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