MK2745-21SLFTR

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The MK2745-21SLFTR is a clock generator, phase-locked loop (PLL) and frequency synthesizer designed for applications where a wide range of frequencies, low phase noise and low spurious levels are essential. This device is ideal for applications such microwaves, satellite communication systems, instrumentation, medical and military equipment, telecom, laboratory and industrial control, and GPS systems.

The MK2745-21SLFTR makes use of a unique form of frequency synthesis, called fractional-N synthesis. This type of synthesis associates an output frequency that is an integer multiple of a reference frequency, the ratio between these two frequencies being determined by the divider reserves. Fractional-N synthesis offers several advantages such as reduced signal jitter, improved phase noise and superior control over the generated signal.

The MK2745-21SLFTR also features an integrated phase-locked loop (PLL) to further minimize signal jitter, noise and phase errors. The PLL uses a phase detector and a voltage controlled oscillator (VCO) to generate a signal that is a multiple of a reference signal, thus allowing for even greater flexibility in frequency and signal synthesis. The phase detector compares the two signals, which allows for phase corrections, and the VCO then adjusts the frequency of the generated signal to the desired level.

The MK2745-21SLFTR is made up of two main components; an input multiplexer (IMUX) and a digital phase frequency detector (PFD). The IMUX allows for dynamic selection of the reference frequency and the PFD allows for synchronization of the output signal with the reference signal. It also features a dual-modulus divider which can select outputs between 2 different output frequency ranges. This allows the output frequency to be changed by selecting one of the 6 different output frequencies. Additionally, the MK2745-21SLFTR features programmable bandwidth selection and frequency compensation, which reduces spurious signals generated by the device’s oscillators.

The MK2745-21SLFTR consists of several other components aside from the IMUX and PFD such as programmable VCO, frequency synthesizer and control logic. The programmable VCO allows for a wide variety of frequency selections and the frequency synthesizer can synthesize any desired frequency from the output frequencies. The control logic ensures that the output frequency is controlled and synchronized with the reference frequency. Additionally, the MK2745-21SLFTR provides a high-speed clock generator with a low-jitter output.

In summary, the MK2745-21SLFTR is a highly advanced clock generator, PLL and frequency synthesizer, offering a wide range of frequencies and low jitter and spurious levels. Its fractional-N synthesis, integrated PLL and programmable bandwidth selection and compensation make it an ideal choice for applications requiring precision timing and synchronization.

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