SL28774ELCT

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The SL28774ELCT is a precision monolithic frequency synthesizer providing an optimal clock and timing source for application-specific requirements. This synthesizer incorporates a low jitter oscillator, dual PLLs and a frequency divider to provide precise square wave outputs. It offers two configurable options, a digital frequency synthesizer and a frequency divider, to support various application-specific needs.

The SL28774ELCT is a digital frequency synthesizer that synthesizes precise square wave outputs. It is ideal for data acquisition applications where precise timing is critical. It features a zero-delay operation using a Phase Locked Loop (PLL) based architecture, together with ultra-low jitter for tight timebase control. The PLL takes the reference clock, which can be from an off-chip source, and feeds it into a digitally controlled oscillator (DCO), which is then phase-locked to the reference clock.The output of the synthesizer is a phase-locked frequency composed of the reference clock multiplied by the programmed n-factor of the DCO. Using this DCO design, the same n-factor can be used to generate multiple clock outputs of the same frequency, thus eliminating the need for the end product to re-design its board to accommodate multiple frequency channels.

The SL28774ELCT also incorporates a frequency divider, allowing applications to generate a wide range of frequencies from a single source. The device supports ratio division of 1 to 16, and also fractional division such as 1/3, 1/7 and 1/14. The frequency division also has adjustable duty cycle and slew control, allowing a greater number of frequencies to be generated. This allows the user to optimize the frequency division for each application.

Overall, the SL28774ELCT is a highly integrated frequency synthesizer solution for applications requiring precise square wave outputs. The combination of its PLL-based architecture and its frequency division capabilities allows applications to generate a wide range of frequencies with low jitter and adjustable duty cycle and slew rates. The configurable options also make it suitable for different applications such as data acquisition and frequency modulation applications.

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