844008AYI-01LF

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

The 844008AYI-01LF is a high-performing frequency synthesizer based on the proven integrated programmable digital filter technology used in Exar’s acclaimed clock and data recovery products. This synthesizer delivers best-in-class performance and cost efficiency with no calibration or programming required.

This product is highly applicable in many applications. Primarily, 844008AYI-01LF is designed to work as a Clock Generator and Phase Locked Loop (PLL) synthesizer. It is well-suited to frequency synthesis and system clock generation needs. It provides a frequency reference and can provide several fin outputs based on any input reference frequency. It also has a frequency multiplier which can be used to generate a higher frequency.

Frequency Synthesizer

The 844008AYI-01LF is a frequency synthesizer with advanced features. It is an interpolative and Integrated Programmable Digital Filter (IPDF) based synthesizer, making it highly capable and reliable. Additionally, it supports a wide range of data rates and clock frequencies, from 10 KHz to 667 MHz. Additionally, it includes a phase-locked loop (PLL) to improve stability and for additional phase noise reduction.

The 844008AYI-01LF frequency synthesizer also offers high-frequency resynthesis, parallel clock outputs, and multiple signal paths. It also offers excellent linearity and phase noise, enabling it to achieve high signal quality. The 844008AYI-01LF is also highly suitable for low jitter and high precision applications.

Working Principle

The 844008AYI-01LF clock generator is capable of providing multiple fin frequency outputs based on any input reference frequency. It uses a combination of Integrated Programmable Digital Filter (IPDF) interpolation and a phase locked loop (PLL). The interpolation filter enables frequency resynthesis, while the PLL improves programmability and reduces phase noise. Internal logic is then used to control PLL and frequency selection for desired output operations.

The PLL utilizes a lowpass filter to adjust its output frequency to match the reference frequency. The PLL parameters can be modified to enable performance optimization and to reduce the unit-to-unit variation. This allows for best-in-class performance at a lower cost compared to other frequency synthesizer solutions. It also enables significantly higher levels of precision and low jitter performance without the need for calibration.

Conclusion

In conclusion, the 844008AYI-01LF clock generator is an excellent solution for system clock and frequency synthesis applications. Its IPDF interpolation and PLL combination provides a cost-effective solution with uncompromised performance and stability. Additionally, it offers excellent linearity and jitter performance, allowing it to achieve exceptional signal quality which is ideal for precision applications.

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