ADF4157BRUZ

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ADF4157BRUZ is a clock generator and frequency synthesizer developed and manufactured by Analog Devices. It combines a wide range of features and applications fitting in modern communication systems. It is suitable for applications such as Wi-Fi, cellular and Short Range Device (SRD) communications which operate in the 300MHz to 6GHz and 315 to 433MHz ISM bands.

ADF4157BRUZ has two main applications, the first one being timing functions such as clock generation and frequency synthesis. It has two built-in PLLs and voltage controlled oscillators (VCOs) that can provide clock signals from 300MHz to 6GHz with a frequency resolution of 1Hz. In addition, ADF4157BRUZ has two wide-input-impedance differential inputs which allow for easier connection to external references, allowing for more flexibility in frequency and phase control.

ADF4157BRUZ’s second application is that of phase-locked loop (PLL) phase noise reduction and frequency pull-in operation. Its integrated PLLs have been designed to reduce time-domain phase noise while its frequency pull-in feature ensures a fast frequency lock-on time. This allows ADF4157BRUZ to handle a wide range of applications with varying performance requirements, while still delivering consistent results.

The operating principle of the ADF4157BRUZ consists of three components: the reference input, the charge pump and the voltage-controlled oscillator. The reference input is a low frequency signal, typically 0-30MHz, used to control the VCO frequency. The charge pump is provided with a control bit from the external CPU, which dictates the up/down cycle of the charge pump. This in turn adjusts the voltage output of the VCO. The frequency of the VCO depends on the output voltage and the associated reference frequency used. The frequency can thus be precisely adjusted and the frequency/phase noise can be reduced as required.

The ADF4157BRUZ is a highly advanced clock generator and frequency synthesizer, which makes them ideal for use in modern communication systems. They provide a wide range of features including two high performance PLLs and VCOs, low power consumption, frequency resolution of 1Hz, wide input impedance differential inputs, and the ability to reduce phase noise. When paired with the right application, the ADF4157BRUZ can deliver highly accurate frequency and phase control, making it a suitable choice for Wi-Fi, cellular and SRD communication systems.

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