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ADF4196 Fractional-N PLLs Frequency Synthesizers

Analog Devices ADF4196 Fractional-N PLLs Frequency Synthesizers implement local oscillators (LO) in the up-conversion and down-conversion sections of wireless transmitters and receivers. ADF4196's design meets the GSM/EDGE lock-time requirements for base stations. The series's fast settling capability makes the ADF4196 well-suited for pulse Doppler radar applications. The design includes a low-noise, digital phase frequency detector (PFD) and a precision differential charge pump. ADF419's differential amplifier converts the output of the differential charge pump to a single-ended voltage for the external voltage-controlled oscillator (VCO). The sigma-delta (Σ-Δ) based fractional interpolator, in conjunction with the N divider, enables programmable modulus fractional-N division. Designers can implement a complete phase-locked loop (PLL) if the synthesizer is used with a VCO and an external loop filter. ADF419's switching architecture ensures that the PLL settles within the GSM time-slot guard period. This switching architecture eliminates the need for a second PLL and associated isolation switches. The fractional-N PLL architecture decreases the complexity, PCB area, shielding, and characterization compared to previous ping-pong GSM PLL architectures.Learn More

RF, Microwave & Millimeter Wave ADI SLP

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Alternate Names

Analog Devices has several brands around the world that may have alternate names for ADF4196BCPZ due to regional differences or acquisition. ADF4196BCPZ may also be known as the following names:

AD5242BRUZ1M distributor