GENERAL DESCRIPTION
●The ADF4159 is a 13 GHz, fractional-N frequency synthesizer with modulation and both fast and slow waveform generation capability. The part uses a 25-bit fixed modulus, allowing subhertz
●frequency resolution. The ADF4159 consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. The Σ-Δ-based fractional interpolator allows programmable fractional-N division. The INT and FRAC registers define an overall N divider as N = INT + (FRAC/225).
●FEATURES
●RF bandwidth to 13 GHz
●High and low speed FMCW ramp generation
●25-bit fixed modulus allows subhertz frequency resolution
●PFD frequencies up to 110 MHz
●Normalized phase noise floor of −224 dBc/Hz
●FSK and PSK functions
●Sawtooth, triangular, and parabolic waveform generation
●Ramp superimposed with FSK
●Ramp with 2 different sweep rates
●Ramp delay, frequency readback, and interrupt functions
●Programmable phase control
●2.7 V to 3.45 V analog power supply
●1.8 V digital power supply
●Programmable charge pump currents
●3-wire serial interface
●Digital lock detect
●ESD performance: 3000 V HBM, 1000 V CDM
●APPLICATIONS
●FMCW radars
●Communications test equipment
●Communications infrastructure
