PL580-37QC-R

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The PL580-37QC-R is a type of frequency synthesizer from Exar Corporation. It has a frequency range of up to 33MHz and provides a range of output waveforms from sine to square. The PL580-37QC-R is a cost-effective solution for frequency synthesis applications in the industrial, communications, computing, and aerospace/defense fields.

Application Field

The PL580-37QC-R can be used in such applications as frequency generation for laser sources, communications equipment, and audio systems. It can also be used in applications requiring highly stable frequencies, such as telecommunications. In addition, the PL580-37QC-R is well suited for applications needing to generate low-jitter signals and variable frequency output, such as computers, data processing systems, and communication equipments.

Working Principle

The PL580-37QC-R uses a phase-locked loop (PLL) frequency synthesizer as its core. It has a dual loop architecture and uses an analog loop to set up multiplication and division of input frequencies, while a digital loop is used for programming and selecting of the output frequencies. The PL580-37QC-R has a PLL period output control that allows the user to program the output frequency between certain limits. This period output is compared to a reference clock and a voltage-controlled oscillator, and phase errors are used to adjust the output frequency accordingly. This allows the PL580-37QC-R to lock and hold a frequency on a chosen channel without any variations.

The PL580-37QC-R also has a selectable low-noise spread-spectrum frequency modulation feature. This feature reduces the total peak power of the signal and can be used to solve issues such as EMI interference. The clock output frequency can also be changed in steps of 0.1MHz by the use of a controlvoltage, making the PL580-37QC-R suitable for various types of automatic frequency adjusting applications.

The PL580-37QC-R provides a very low-jitter output clock signal, making it an ideal solution for frequency-critical communication applications. It also has a built-in reference clock amplifier, which allows it to be used without the need for an external clock source. The output frequency can also be adjusted externally with a parallel port.

Conclusion

The PL580-37QC-R is a cost-effective, high-performance frequency synthesizer from Exar Corporation. It is suitable for various applications, such as frequency generation for laser sources, communications equipment and audio systems, and it is ideal for applications needing to generate low-jitter signals and variable frequency outputs, such as computers and data processing systems. The PLL frequency synthesizer core of the PL580-37QC-R provides a very low-jitter output clock signal, while its selectable low-noise spread-spectrum frequency modulation feature helps reduce EMI interference. Overall, the PL580-37QC-R is an excellent choice for frequency synthesis applications in the industrial, communications, computing, and aerospace/defense fields.

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