Thursday, January 5, 2012

Analog Devices’ PLL synthesizers deliver utmost flexibility and phase noise performance

NORWOOD, USA: Analog Devices Inc. (ADI) announced the release of two new PLL synthesizer that allows utmost flexibility and phase noise performance.

The ADF4151 and ADF4196 PLL synthesizers ease design in a variety of applications including communications infrastructure base-stations, pulse and Doppler radar applications, test and instrumentation equipment, microwave point-to-point systems, PMR (professional mobile radio), VSATs (very small aperture terminals) and aerospace systems.

With an RF bandwidth of 3.5 GHz, the ADF4151 allows implementation of a Fractional-N or Integer-N PLL synthesizer. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider and is pin-and software-compatible with ADI’s widely-used ADF4350 4.4 GHz PLL.

When these two PLLs are used together, the ADF4151 facilitates the use of an external voltage controlled oscillator (VCO) and greatly improves phase noise without significant board revisions.

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