ADF4169CCPZ

ADF4169 is a 13.5GHz, fractional-N frequency synthesizer with modulation and both fast and slow waveform generation capability. This device uses a 25bit fixed modulus, allowing subhertz frequency resolution. It 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). It can be used to implement frequency shift keying (FSK) and phase shift keying (PSK) modulation. Frequency sweep modes are also available to generate various waveforms in the frequency domain, for example, sawtooth waveforms and triangular waveforms. Sweeps can be set to run automatically or with each step manually triggered by an external pulse. It is used in application such as FMCW radars, communications test equipment, communications infrastructure etc.

• High and low speed FMCW ramp generation
• 25bit fixed modulus allows subhertz frequency resolution
• PFD frequencies upto 130MHz, ESD performance is 3000V HBM, 1000V CDM
• Normalized phase noise floor (integer-N mode) is -224dBc/Hz typical
• FSK and PSK functions, sawtooth and triangular waveform generation
• Ramp superimposed with FSK, ramp with 2 different sweep rates
• Ramp delay, frequency readback, and interrupt functions, programmable phase control
• 2.7V to 3.45V analogue power supply, 1.8V to 2V digital power supply
• Programmable charge pump currents, 3-wire serial interface, digital lock detect
• Operating temperature is -40°C to +125°C, package style is 24-lead LFCSP-EP

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