This file introduces the features of the ADF4159 direct modulation/fast waveform generation 13 GHz fractional-N frequency synthesizer, including RF bandwidth, frequency resolution, frequency and phase modulation capability, sawtooth and triangular waveform generation, parabolic ramp, ramp superimposed with FSK, ramp with 2 different sweep rates, ramp delay, ramp frequency readback, ramp interruption, 2.7V to 3.3V analog power supply, 1.8V digital power supply, programmable charge pump currents, 3-wire serial interface, digital lock detection, power-down mode, cycle slip reduction, switched bandwidth, fast lock mode, etc.