PL685-P8-068OC

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The PL685-P8-068OC is a versatile clock generator, phase-locked loop (PLL), and frequency synthesizer. It operates in the frequency range of 2.5 to 15 million Hertz (MHz). It’s made to have a good jitter and cycle-to-cycle jitter noise performance, making it optimal for precision timing applications. It features features such as adjustable skew, frequency multipliers, and selectable output frequencies.

Application Field

The PL685-P8-068OC is widely used in the telecommunications industry, including many radio and radio frequency (RF) projects. It is also used in high-speed digital circuits, such as clocking for microprocessors, memory systems, and other digital applications. It can be used for frequency synthesisers, charge pumps, clock dividers, embedded controllers, and frequency multipliers.

The PL685-P8-068OC can also be used in other fields, such as automotive, medical imaging, and embedded audio systems. Its reliable performance makes it ideal for use in industrial automation, which requires accurate and reliable timing. It’s also suitable for many testing and measurement applications, RF amplification, and clock tree synthesis.

Working Principle

The PL685-P8-068OC utilizes a digital phase-locked loop (DPLL) in order to generate a target frequency. Its internal oscillator is configured with a digital controller, which can be set to various frequencies. This can be done through pulse-width-modulated (PWM) signals from external sources.

This circuitry is then connected to an multiplier block, which can scale the already existing signal up to 4x. This multiplier is set up with a continuous time linear equalizer (CTLE) and a 2nd order Cascaded Integrator Comb (CIC) filter. The equalizer sets the signal’s bandwidth, and the filter helps to reduce the jitter error rate.

The output frequency is then generated by digitally controlling a voltage controlled oscillator (VCO). This VCO can multiply the base signal or divide it down, as needed. The generated frequency is then sent to the output buffer, which can be configured to use differentialsier or an on-chip voltage regulator.

If the output frequencies are desired to be below the base frequency, then the charge pump circuit cuts off the desired fraction of the cycle. Thischarge pump will adjust the voltage it outputs, depending on the current phase mismatch of the two signals. This outputs a restorative signal, which will increase/decrease the VCO frequency when the actual frequency does not match the desired frequency.

The PL685-P8-068OC also has a cycle-to-cycle jitter (CCJ) noise filter, which reduces cycle-to-cycle jitter error rate, helps preserve the output frequency accuracy, and guarantees that the desired large-scale frequency is achieved. This, of course, works in tandem with the on-chip loop filter, which is configured with a high-precision, low-noise multiplexer.

Conclusion

The PL685-P8-068OC is an ideal clock generator, phase-locked loop (PLL), and frequency synthesizer for precision timing applications. Its versatility makes it suitable for use in a variety of industries, ranging from telecommunications to medical imaging to industrial automation. It effectively reduces the cycle-to-cycle jitter error rate and ensures that the desired large-scale frequency is achieved through digital control. All of these features and more make the PL685-P8-068OC a reliable and cost-effective choice for many timing solutions.

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