CDC421100RGER

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Clock Generator, Phase-Locked Loop, and Frequency Synthesizer are three critical components in advanced electronic system design. They all play important roles in providing precise and steady clock signals for system operation. The CDC421100RGER is an advanced clock generator and synthesizer module that has become a popular choice for meeting challenging application needs. In this article, an overview of CDC421100RGER application field and working principle is provided.

Application Fields

The CDC421100RGER is an integrated oscillator module that can deliver precise clock signals from 1 Hz to up to 8.2 GHz frequency range. Its primary applications include high-speed communication protocols and digital system designs such as microprocessors, FPGAs, ASSPs, and ASICs. Additionally, the module supports pre-programmed frequencies, which makes it a great choice for applications that require frequency-hopping over a certain applicable range.

Other than providing clean, precise, and steady clock signal, the CDC421100RGER also has few optional features that makes this module even more attractive for advanced applications. These features include wide temperature range, exceptional jitter performance, low power consumption, and output frequency modulation.

Working Principle

The CDC421100RGER utilizes a loop-based synthesizer architecture to generate highly precise clock signals. This architecture consists of three main components: reference oscillator, voltage-controlled oscillator (VCO), and a phase frequency detector (PFD). The reference oscillator provides reference clock signals for the PFD, which is then compared to the output of the VCO. Based on the comparison result, the PFD makes a Phase to Frequency conversion for controlling the VCO such that the output of the VCO matches the reference frequency.

To minimize jitter, the CDC421100RGER also comprises other components such as loop filter, clock synthesizer module, and a prescaler. The filter will take care of providing required damping characteristics to the loop and smoothens the transfer function generated by the control loop. Furthermore, the prescaler is implemented to assist the loop in operating under wide range of supply voltages and other process conditions. The synthesizer module process all tuning instructions generated by the PFD and adjust the VCO frequency accordingly.

The on-chip linear regulator is used for powering the CDC421100RGER module. The voltage supply monitoring circuit adjusts the output frequency of the module in order to ensure reliable operation in case of an outage of power. In addition to the on-chip voltage regulator, the module also supports external voltage regulators There are certain high-accuracy applications that utilize external voltage regulators in order to provide an extremely stable voltage supply to the module.

The CDC421100RGER integrates a set of frequency modulation components on-chip to make the module suitable for frequency-hopping applications. Such an application requires the module to rapidly switch between frequencies with minimal jitter in order to avoid interference. The frequency modulation scheme implemented on the module allows it to make frequency transitions faster than other clock generators.

Overall, the CDC421100RGER module is capable of delivering highly precise clock signals from 1 Hz to up to 8.2 GHz frequency range with exceptional jitter performance. Beside the adjustable frequency range, the module is evaluated for supporting additional features such as low power consumption, wide temperature range, output frequency modulation, and voltage monitoring circuit.

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