MK1725GLFTR

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The MKL1725GLFTR device is a high-performance, low-power, integrated PLL clock synthesizer with many features to enable more efficient designs. It is designed to generate low-jitter clock outputs derived from off-chip sources, such as crystal oscillators, for use in digital systems. The MKL1725GLFTR is part of a portfolio of products offered by different vendors for the clock and timing field. This device can be used in a variety of applications, including active antenna systems, wideband radios, wireless local area networks (WLANs), short-range digital radio systems, test and measurement, and broadband access.

The MKL1725GLFTR incorporates a fractional-N-based frequency synthesizer, a low-noise voltage-controlled oscillator (VCO), and a programmable divider, allowing flexibility in system design. The synthesizer supports applications requiring frequencies up to 330 MHz, making it suitable for designs in the 2.4 and 5 GHz ISM bands. In addition, the device offers operation in multiple power modes including ultra-low, low, and medium-power, allowing users to achieve power requirements that meet system application requirements.

The working principles of this device rely on features such as phase-lock loop. The phase lock loop is a system that allows an oscillator circuit to track the frequency and phase of an input signal closely. It takes an input signal, compares it with a locally generated signal, and adjusts the phase, frequency, or amplitude of the locally generated signal to keep it in close synchronization with the input signal. This phase-lock loop is used for clock synchronization and frequency synthesis, making it a major building block and enabling feature of digital communication systems.

In the clock synthesizer, the phase-lock loop controls the VCO corresponding to a frequency determined by the external crystal. The VCO frequency is determined by the current supplied to it by the fractional-N synthesizer and a programmable divider. The output frequency is determined by the input clock frequency, the synthesis ratio (N), and the output divider value. The output frequency can be calculated by this equation:

Output Frequency (f_OUT) = Input Frequency (f_IN) x (N/D)

where N and D are the synthesis ratio and divider, respectively. The output frequency can be programmed through the I²C bus or manually through pins, which allows for flexibility in system design. In addition, the MKL1725GLFTR includes a number of features to reduce size and complexity of designs, such as integrated charge pump and low-noise buffer.

The MKL1725GLFTR is available in a compact, 8-pin, 0.65 x 1.0 mm-sized package, making it ideal for applications requiring a small form factor. The device also offers an operation temperature range of -40°C to +105°C, allowing it to be used in most applications. The MKL1725GLFTR is a highly integrated and cost-effective solution for PLLs, synthesizers, and clock generators in digital communication applications.

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