AD9528BCPZ-REEL7

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AD9528BCPZ-REEL7 Application Field and Working Principle

The AD9528BCPZ-REEL7 is a low-jitter clock generator and fanout buffer, which is classified under Clock/Timing - Clock Generators, PLLs, and Frequency Synthesizers.

The AD9528BCPZ-REEL7 has been designed to provide a flexible, low-jitter clock source solution for digital systems, such as switched fabric interfaces, line cards, storage arrays, and communication systems. It has up to 1.75GHz of frequency synthesizing and buffering capability across 11 output channels. It also supports a wide variety of clock sources, including crystal, SMA, and external reference.

The AD9528BCPZ-REEL7 offers several features, such as a low jitter PLL, low phase noise, low noise (<34dBm typical), differential output drivers and an adjustable output amplitude. It also features an adjustable watchdog timer and a load detection output signal. Its flexible output buffers offer the ability to distribute multiple copies of the same signal or to select different clocks for different outputs.

Working Principle

The main function of the AD9528BCPZ-REEL7 is to generate a low-jitter clock signal from any one of its input sources, such as crystal, SMA or external reference. The input signal is then passed through a phase-locked loop (PLL) and sent to the outputs, which can be configured to distribute different clocks or copies of the same clock signal.

The PLL used in the AD9528BCPZ-REEL7 is based on a voltage-controlled oscillator (VCO) and a phase/frequency detector (PFD) to lock the oscillator\'s frequency to the frequency of the reference signal. The feedback loop consists of the VCO, a divider, and the PFD. The VCO is used to manipulate the output frequency in response to the input signal. Depending on the input, the PLL can achieve fast and precise locking within a fraction of a second.

The AD9528BCPZ-REEL7 also offers an adjustable watchdog timer, which helps to prevent output clock jitter due to input signal fluctuations. It also features a load detection output, which can be used to identify changes in the load on the output.

Overall, the AD9528BCPZ-REEL7 is an important device in the field of clock generation and buffering, as it offers a high level of flexibility and a low jitter clock solution for a variety of applications. Thanks to its wide variety of clock sources and output buffering options, it is an ideal choice for digital systems.

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