ADI ADF5610微波宽带压控振荡器(VCO)解决方案

ADI公司的ADF5610是微波宽带压控振荡器(VCO),工作频率从3700MHz到14600MHz,单个射频(RF)输出.ADF5610和外接回路滤波器和外接基准源一起,能实现分数N或整数N锁相环(PLL)频率合成器.带差分频率输出的分频器工作在57 MHz 到14600 MHz,而PLL电路的模拟和数字电源从3.1V到3.5V,而VCO的工作在4.75V-5,25V,电荷泵的电源可扩展到3.6V.ADF5610还集成了基频从3650 MHz到7300 MHz的VCO,其差分输出允许倍频VCO频率能进行1, 2, 4, 8, 16, 32, 64或128分频,使得用户可获得低至57MHz RF输出频率.集成的鉴相器(PD)和delta-sigma (Δ-Σ)调制器,工作高达100MHz,其杂散电平为-100dBc.而相位噪音电平从7.3GHz的−115 dBc/Hz到14.6GHz的−109 dBc/Hz. RFOUT功率5dBm,可编程输出功率电平,典型功耗815mW.主要用在军用和国防,测试设备,时钟发生器,无线基础设备,卫星和甚小孔径终端(VSAT),微波无线电.本文介绍了ADF5610主要特性,功能框图,PLL和VCO子系统框图,以及评估板EV-ADF5610SD1Z主要特性,电路图,材料清单和PCB设计图.
The ADF5610 allows implementation of fractional-N or Integer N phase-locked loop (PLL) frequency synthesizers when used with an external loop filter and an external reference source. The wideband microwave voltage controlled oscillator (VCO) design permits frequency operation from 7300 MHz to 14600 MHz at a single radio frequency (RF) output. A series of frequency dividers with a differential frequency output allows operation from 57 MHz to 14600 MHz.Analog and digital power supplies for the PLL circuitry range from 3.1 V to 3.5 V, and the VCO supplies are between 4.75 V and 5.25 V. The charge pump supply voltage can be extended up to 3.6 V for improved frequency band overlap and extended upper frequency range.
The ADF5610 has an integrated VCO with a fundamental frequency of 3650 MHz to 7300 MHz. These frequencies are internally doubled and routed to the RFOUT pin. An additional differential output allows the doubled VCO frequency to be divided by 1, 2, 4, 8, 16, 32, 64, or 128, allowing the user to generate RF output frequencies as low as 57 MHz. A simple 3-wire serial port interface (SPI) provides control of all on-chip regist...