CPLL66-3475-3475

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CPLL (charge pump-based phase locked loop) clock generators exhibit several advantages over its predecessors, such as lower jitter, faster lock time, and dynamic frequency control. This technology was first developed in the late 1970s, and has come a long way since then. The CPLL66-3475-3475 is an example of this kind of clock generator.

The CPLL66-3475-3475 is a versatile, cost-effective PLL solution designed to provide a single output frequency ranging from 75 MHz to 135 MHz with a maximum jitter of 500fs. This device is suitable for a wide range of applications in communication, embedded computing, and consumer electronics. Additionally, CPLL66-3475-3475 has low power consumption in both standby and normal operating modes, making it an ideal choice for mobile applications.

A PLL consists of a voltage-controlled oscillator (VCO), a phase detector, a low-pass and a filter. In the CPLL66-3475-3475, the VCO produces a signal at the output frequency which is compared to the input reference signal. The phase detector produces an error signal which is equal to the difference in phase between the two signals. This error signal then goes through a low-pass filter to create a DC voltage which is directly proportional to the phase difference.

The high-frequency AC component of the signal is then further filtered to remove noise and drift components. The filtered signal is then applied to the VCO which adjusts the frequency of the output signal to match the reference signal. The CPLL66-3475-3475 uses a charge pump-based phase detector to improve loop convergence time and phase jitter.

The two main components of the charge pump-based phase detector are the charge pump and the loop filter. The charge pump is an AC signal source and the loop filter is an RC filter composed of resistors and capacitors. The charge pump produces an alternating current to the loop filter, which converts the AC signal into a DC voltage. The voltage is then applied to the VCO to adjust its frequency to the reference signal.

The CPLL66-3475-3475 also features a phase-lock range of ±1.5 degrees and a frequency-lock range of ±20 ppm. This makes it suitable for applications with frequency drift or where precise phase-locking is required. Additionally, the CPLL66-3475-3475 features an adjustable loop bandwidth from 10 Hz to 2000 Hz, making it suitable for a wide range of frequency stability requirements.

In summary, the CPLL66-3475-3475 is a versatile, cost-effective PLL solution designed for a wide range of applications and is suitable for applications requiring fast lock times and precise frequency control. This device features a adjustable loop bandwidth for flexibility and an excellent phase-lock and frequency-lock range for stable frequency control. Additionally, the low power consumption and low jitter make this device ideal for mobile applications.

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