LTC6946 Datasheet | Linear Technology

Ultralow Noise and Spurious 0.37GHz to 6.39GHz Integer-N Synthesizer with Integrated VCO Features Description nn Low Noise Integer-N PLL with Integrated VCO nn - 226d Bc/Hz Normalized In-Band Phase Noise Floor nn - 274d Bc/Hz Normalized In-Band 1/f Noise nn - 157d Bc/Hz Wideband Output Phase Noise Floor nn Excellent Spurious Performance nn Output Divider (1 to 6, 50% Duty Cycle) nn Output Buffer Muting nn Low Noise Reference Buffer nn Charge Pump Current Adjustable from 250µA to 11.2m A nn Configurable Status Output nn SPI patible Serial Port Control nn PLLWizard™ Software Design Tool Support Applications nn Wireless Base Stations (LTE, Wi MAX, W-CDMA, PCS) nn Broadband Wireless Access nn Military and Secure Radio nn Test and Measurement L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PLLWizard is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. The LTC®6946 is a high performance, low noise, 6.39GHz phase-locked loop (PLL) with a fully integrated VCO, including a reference divider, phase-frequency detector (PFD) with phase-lock indicator, ultralow noise charge pump, integer feedback divider, and VCO output divider. The charge pump contains selectable high and low voltage clamps useful for VCO monitoring. The integrated low noise VCO uses no external ponents. It is internally calibrated to the correct output frequency with no external system support. The part Features a buffered, programmable VCO output divider with a range of 1 through 6, providing a wide frequency range. Frequency Coverage Options LTC6946-1 LTC6946-2 LTC6946-3 LTC6946-4 O DIV=1 2.240 to 3.740 3.080 to 4.910 3.840 to 5.790 4.200 to 6.390 O DIV=2 1.120 to 1.870 1.540 to 2.455 1.920 to 2.895 2.100 to 3.195 0 DIV=3 0.747 to 1.247 1.027 to 1.637 1.280 to 1.930 1.400 to 2.130 O DIV=4 0.560 to 0.935 0.770 to 1.228 0.960 to 1.448 1.050 to 1.598 O DIV=5 0.448 to 0.748 0.616 to 0.982 0.768 to...