SI51218-A05918-GM

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The SI51218-A05918-GM is a nanosecond programmable clock generator. It is classified as a clock generator, phase-locked loop, frequency synthesizer in the clock/timing world. Its features include a wide output range between 19.2 MHz and 950MHz, adjustable output duty cycle, low jitter and a wide range of output feature configurations. This makes it an ideal clock generator for applications such as High Definition Television (HDTV), Analog and Digital Video, Set Top Boxes, Wireless Transmission, LVDS, Serial ATA, USB and 1394 interfaces, Broadband/DSL modems, and military/aerospace applications.

The main advantage of the SI51218-A05918-GM is the wide frequency range and the nanosecond accuracy with which frequencies can be programmed. The programmed frequency is accurate to +/- 10ppm, with a fundamental frequency setpoint stability of +/- 0.25ppm. This accuracy is provided by the use of a low noise crystal oscillator, which is used as a reference for the output clock frequency. In addition, it has a wide range of output feature configurations (e.g. hysteresis and adjustable duty cycle) which makes it suitable for a range of applications.

The working principle of the SI51218-A05918-GM is based on a Phase-Locked Loop (PLL), which uses a reference oscillator and a stable clock signal to generate the desired (and adjustable) output frequency. The PLL is composed of a Voltage Controlled Oscillator (VCO), which is responsible for generating the output signal; a Phase/Frequency Detector (PFD) for detecting the phase and frequency differences between the reference oscillator and the output signal; and a Proportional-Integral Filter (PIF) for filtering the control signal from the PFD. The PLL adjusts the output frequency by controlling the frequency of the VCO using the control signal from the PIF.

The SI51218-A05918-GM also features a built-in automatic voltage scaling, which adjusts the internal voltage for the VCO to obtain the optimum performance for a wide range of frequencies. This feature makes the SI51218-A05918-GM suitable for applications demanding lower power consumption, such as portable devices.

In conclusion, the SI51218-A05918-GM is an ideal clock generator for a variety of applications, due to its wide frequency range, high accuracy and wide range of output feature configurations. The convenience of its low jitter, adjustable output duty cycle, and automatic voltage scaling makes it a popular choice for customers looking for a reliable and cost-effective clock generator.

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