ADF4355

series introduction

# ADF4355 Product Series Introduction

## 1. Overview
The ADF4355 is a cutting - edge product series developed by Analog Devices, renowned for its high - performance frequency synthesis capabilities. It is a versatile and highly integrated fractional - N and integer - N phase - locked loop (PLL) with a built - in voltage - controlled oscillator (VCO). This product series is designed to meet the demanding requirements of a wide range of applications in the fields of wireless communication, test and measurement, and aerospace and defense.

## 2. Key Features

### 2.1 Wide Frequency Range
The ADF4355 offers an extremely wide output frequency range from 34.375 MHz to 13.6 GHz. This broad frequency coverage makes it suitable for various wireless standards such as 5G, Wi - Fi 6E, and satellite communication. Designers can use a single device to cover multiple frequency bands, reducing the need for multiple frequency - generating components and simplifying the overall system design.

### 2.2 High - Resolution Frequency Synthesis
It provides fractional - N frequency synthesis with a resolution of up to 0.023 Hz. This high - resolution capability allows for precise frequency tuning, which is crucial in applications where accurate frequency control is required, such as in radar systems and high - precision test equipment. The fractional - N operation also enables fine - step frequency adjustment, making it possible to generate frequencies that are not integer multiples of the reference frequency.

### 2.3 Low Phase Noise
Phase noise is a critical parameter in frequency synthesis, especially in communication systems. The ADF4355 features low phase noise performance, which helps to improve the signal - to - noise ratio (SNR) of the output signal. Low phase noise reduces interference and jitter in the system, resulting in better overall system performance, such as improved bit error rate (BER) in communication links and more accurate measurements in test and measurement applications.

### 2.4 Integrated VCO
The built - in VCO eliminates the need for an external VCO, reducing the component count and board space requirements. The integrated VCO is optimized for low phase noise and high - frequency operation, providing a stable and reliable frequency source. This integration also simplifies the design process and reduces the overall cost of the system.

### 2.5 Programmable Dividers
The ADF4355 has programmable reference and feedback dividers, which allow for flexible frequency planning. Designers can adjust the division ratios to achieve the desired output frequency based on the available reference frequency. This programmability provides greater flexibility in system design and enables the device to be used in a variety of applications with different frequency requirements.

### 2.6 Digital Interface
It is equipped with a 3 - wire serial interface, which makes it easy to communicate with a microcontroller or other digital control devices. The digital interface allows for quick and convenient programming of the device's registers, enabling real - time frequency changes and configuration adjustments. This feature is particularly useful in applications where dynamic frequency control is required, such as in software - defined radio (SDR) systems.

## 3. Applications

### 3.1 Wireless Communication
In 5G wireless base stations, the ADF4355 can be used to generate the local oscillator (LO) signals required for up - conversion and down - conversion of the radio frequency (RF) signals. Its wide frequency range and high - resolution frequency synthesis capabilities make it suitable for the various frequency bands used in 5G, including millimeter - wave frequencies. In Wi - Fi 6E routers, it can provide stable and accurate frequency sources for the multiple frequency bands used in the 6 GHz spectrum, improving the overall performance and reliability of the wireless network.

### 3.2 Test and Measurement
Test

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