ADF4355BCPZ

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The ADF4355BCPZ is a wideband fractional-N frequency synthesizer phase-locked loop (PLL) IC with a -2.5 dB noise figure and high spurious performance. It has a minimum spur of -50 dBc/Hz, a 0.5% tuning resolution, a 3.5 us lock time, and an output power of +7dBm. The ADF4355BCPZ is ideal for use in radios, TV tuners, and general-purpose communications systems, such as GSM and CDMA. This IC also has excellent RF performance, making it a great choice for test and measurement, base stations, and other radio-frequency applications.

The PLL architecture used in the ADF4355BCPZ is designed for low-phase-noise accuracy. The VCO (voltage-controlled oscillator) is maintained in continuous frequency mode, providing the ability to generate frequencies within a wide range. In addition, the integrated frequency divider is divided into four parts, with three of them generating high-resolution divided frequencies down to the 0.5% level. The fourth divider is used to divide the frequency down even further, allowing for greater resolution when tuning.

Additionally, the ADF4355BCPZ features a low-noise integrated voltage-controlled oscillator (VCO) core. The VCO is designed for a wide-range of frequencies, with adjustable output levels of up to +7dBm. The integrated phase-lock loop (PLL) locks the VCO frequency for continuous operation. The ADF4355BCPZ also features an external reference clock circuit, which allows for increased flexibility when programming the device.

The ADF4355BCPZ also includes three frequency dividers, an output buffer, a phase detector and an operational amplifier, as well as control and status logic. The phase detector is used to compare the input phase frequency with the output phase frequency, allowing the PLL to adjust accordingly. The operational amplifier is used to adjust the gain of the PLL. The output buffer amplifies the frequency of the output signal. The control and status logic monitor the system and provide the necessary control signals for operation.

The ADF4355BCPZ frequency synthesizer is ideal for applications where low-noise and high-resolution are required. The device is especially suitable for commissioning and testing of radio-frequency systems and for usage in frequency synthesis for GSM, CDMA and other communications systems. With its integrated VCO, two frequency dividers, and output buffer, it provides an excellent solution for applications requiring low-noise and high-resolution frequency synthesis.

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