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LTC6905CS5 数据表(PDF) 1 Page - Linear Technology |
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LTC6905CS5 数据表(HTML) 1 Page - Linear Technology |
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1 / 8 page  LTC6905 1 6905fa , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6614313, 6342817. ■ One External Resistor Sets the Frequency ■ Fast Start-Up Time: 100 µs Typical ■ Frequency Range: 17MHz to 170MHz ■ Frequency Error ±0.5% Typ 17MHz to 170MHz (TA = 0°C to 70°C, Over All Settings) ■ ±20ppm/°C Temperature Stability ■ Rise Time: 0.5ns, CL = 5pF ■ Timing Jitter: 50ps at 170MHz ■ 50% ±2.5% Duty Cycle ■ 6mA Typical Supply Current, fOSC = 100MHz ■ CMOS Output Drives 500Ω Load (VS = 3V) ■ Operates from a Single 2.7V to 5.5V Supply ■ Low Profile (1mm) ThinSOT TM Package 17MHz to 170MHz Resistor Set SOT-23 Oscillator ■ High Frequency Precision Oscillator ■ High Speed Data Bus Clock ■ Fixed Crystal Oscillator Replacement ■ Ceramic Oscillator Replacement The LTC ®6905 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: f MHz k R MHz N N Open OSC SET = Ω + ⎛ ⎝ ⎜ ⎞ ⎠ ⎟ = ⎧ ⎨ ⎪ ⎩ ⎪ = = = + 168 5 10 15 1 1 2 4 .• .• , , , , DIV Pin V DIV Pin DIV Pin GND For higher accuracy, fixed frequency versions that include an internal frequency-setting resistor, see the LTC6905- XXX Series datasheet. Basic Connection Typical Distribution of Frequency Error, TA = 25°C DESCRIPTIO FEATURES APPLICATIO S TYPICAL APPLICATIO V+ 1 2 3 5 17.225MHz ≤ fOSC ≤ 170MHz 5V 5V 10k ≤ RSET ≤ 25k 0.1µF 6905 TA01 4 GND LTC6905 SET OUT DIV OPEN ÷2 ÷1 ÷4 % ERROR –0.5 0 10 20 30 40 50 60 NOTE: RESISTOR, RSET, TOLERANCE WILL ADD TO THE FREQUENCY ERROR –0.3 –0.1 0.1 0.3 6905 TA02 0.5 V+ = 3V RSET = 12k DIV = 1 |
类似零件编号 - LTC6905CS5 |
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类似说明 - LTC6905CS5 |
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