AD694JR

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The AD694JR is a highly integrated and versatile fractional-N synthesizer featuring a high speed MASH architecture, which is suitable for a variety of applications. It functions as a versatile fractional-N frequency synthesizer, providing frequency control in the 100 MHz to 10 GHz range with a low noise level. The AD694JR integrates a low power, high performance six-phase PLL and produces high multiphase outputs, enabling applications such as wideband communications and clock generation. The AD694JR is designed to provide a reliable and consistent performance in a wide range of temperature and humidity

The AD694JR can be used for a variety of different applications. It is commonly used as a fractional-N PLL clock synthesizer, providing a low noise output and a high level of frequency control. It is also used as a reference frequency generator, providing a stable and reliable reference frequency for communication and other precision applications. The AD694JR can be used as a wideband frequency translator, providing a wide baseband reference frequency along with an adjustable high frequency output. In addition, the AD694JR can be used to generate higher order harmonics, providing an efficient method to produce various output frequency ranges.

The working principle of the AD694JR is based on the principle of pulse width modulation (PWM) synthesis. This synthesis method allows the AD694JR to produce higher order harmonics in addition to the fundamental frequency. The AD694JR takes input from a reference frequency generator and a voltage controlled oscillator and uses them to synthesize the desired frequency. The voltage control oscillator (VCO) output is then fed into a frequency divider, which creates a number of steps. The number of steps is determined by the reference frequency and the frequency of the VCO output. Each step corresponds to a certain pulse width, which is then translated into the corresponding output frequency.

The AD694JR also incorporates a phase detector, which detects the phase difference between the output of the VCO and the reference frequency. The phase detector then generates a control voltage, which is used to adjust the VCO frequency to achieve a phase lock. This phase lock allows for reliable and consistent frequency synthesis, which is essential for precision applications such as communication and clock generation.

The AD694JR is a highly integrated and versatile fractional-N synthesizer featuring a high speed MASH architecture, offering users a cost-effective solution for a variety of applications. Its low noise level, excellent phase noise performance and wide range of frequency range make it an ideal solution for high end communications, clock generation and other precision applications where reliable frequency synthesis is required.

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