LTC6948 PDF Datasheet
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Description
This is Ultralow Noise 0.37GHz to 6.39GHz Fractional-N Synthesizer. Features
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LTC6948 Ultralow Noise 0.37GH- to 6.39GH- Fractional-N Synthesizer with Integrated VCO Description
The LTC®6948 is a high performance, low noise, 6.39GH- phase-locked loop (PLL) with a fully integrated VCO, including a reference divider, phase-frequency detector (PFD), ultralow noise charge pump, fractional feedback divider, and VCO output divider. The fractional divider uses an advanced, 4th order Δ∑ modulator which provides exceptionally low spurious levels. This allows wide loop bandwidths, producing extremely low integrated phase noise values. The programmable VCO output divider, with a range of 1 through 6, extends the output frequency range.
Output Frequency Options
LTC6948-1 O_DIV = 1 O_DIV = 2 O_DIV = 3 O_DIV = 4 O_DIV = 5 O_DIV = 6 LTC6948-2 LTC6948-3 LTC6948-4 2.240 to 3.740 3.080 to 4.910 3.840 to 5.790 4.200 to 6.390 1.120 to 1.870 1.540 to 2.455 1.920 to 2.895 2.100 to 3.195 0.747 to 1.247 1.027 to 1.637 1.280 to 1.930 1.400 to 2.130 0.560 to 0.935 0.770 to 1.2.