8N4SV75FC-0123CDI

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Programmable timers and oscillators are devices that can generate accurate, regularly repeating signals. 8N4SV75FC-0123CDI is one of these programmable timers and oscillators which can be used for a variety of applications, and that typically has a specific operating principle.

What is 8N4SV75FC-0123CDI?

8N4SV75FC-0123CDI is a programmable timer/oscillator from PulseTronic Inc. It\'s a quaternary programmable clock generator with up to three outputs – two low jitter (±4ps) outputs, and one high jitter (±5ps) output – and is suitable for applications that require very low jitter and low power consumption. The device features frequency resolution up to 16fo (frequencies up to 24GHz), with flexibility to achieve any frequency within the range by programming. Programming can be done via an I2C interface, and the device can optionally be configured as either a jitter attenuator or a phase-locked loop.

Application Field

Due to its very low jitter, 8N4SV75FC-0123CDI is well suited to highly-accurate and super-precise applications such as communication systems, in particular optical communication systems. Its low power consumption also makes it ideal for embedded systems, which need to operate for long periods of time, or applications based around portable or battery-driven devices which need to conserve power. 8N4SV75FC-0123CDI can also be used in test measurement systems, where high precision is required. Finally, its ability to generate very low jitter means it is a good solution for multiplexing applications where jitter must be kept to a minimum in order to prevent interference.

Working Principle

The 8N4SV75FC-0123CDI is based on a phase-locked loop (PLL), which is a type of closed-loop control system that generates an output signal with a phase which is related to the phase of an input signal. The input signal is split into two parts, an oscillator signal (OSC) and a reference signal. When these two signals match a specific frequency, the output signal locks, and is in phase with the reference signal.

In the case of 8N4SV75FC-0123CDI, the oscillator signal is generated by a voltage controlled oscillator (VCO). The reference signal is provided by an external clock signal, and the output signal is derived from a multiplexer, which is also digitally programmed via an I2C interface. The output signal then passes through a phase/frequency detector, where it is compared to the reference signal. If the phase or frequency of the output and the reference are not matched, the PLL circuit automatically adjusts the VCO frequency until the output is in phase with the reference signal.

Conclusion

8N4SV75FC-0123CDI is a quaternary programmable clock generator from PulseTronic Inc., offering three outputs with very low jitter and low power consumption. Its application fields include highly-accurate and precision applications such as communication systems, test measurement systems, portable and battery-driven devices, and multiplexing applications. Its working principle relies on the use of a phase-locked loop, which generates an output signal with a phase of interest relative to an input signal generated by a voltage-controlled oscillator. 8N4SV75FC-0123CDI is thus a perfect choice for applications requiring precision and accuracy.

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