ADF4218中文资料Dual, Integer-N 0.5 GHz/2.5 GHz PLL数据手册ADI规格书

描述 Description

The ADF4216/ADF4217/ADF4218 is a dual frequencysynthesizer which can be used to implement local oscillatorsin the up-conversion and down-conversion sectionsof wireless receivers and transmitters. They canprovide the LO for both the RF and IF sections. Theyconsist of a low-noise digital PFD (Phase FrequencyDetector), a precision charge pump, a programmablereference divider, programmable A and B counters and adual-modulus prescaler (P/P+1). The A (6-bit) and B(11-bit) counters, in conjunction with the dual modulusprescaler (P/P+1), implement an N divider (N= BP+A).In addition, the 14-bit reference counter (R Counter),allows selectable REFIN frequencies at the PFD input.A complete PLL (Phase-Locked Loop) can be implementedif the synthesizers are used with an external loopfilter and VCO's (Voltage Controlled Oscillators)

特性 Features

• ADF4216: 550 MHz/1.2 GHz

• ADF4217: 550 MHz/2.0 GHz

• ADF4218: 550 MHz/2.5 GHz

• 2.7 V to 5.5 V Power Supply

• Selectable Charge Pump Currents

• Selectable Dual Modulus Prescaler
• IF: 8/9 or 16/17

• RF: 32/33 or 64/65



• 3-Wire Serial Interface

• Power-Down Mode

简介

ADF4218属于集成电路（IC）的时钟发生器PLL频率合成器。由制造生产的ADF4218时钟发生器，PLL，频率合成器时钟发生器、PLL 和频率合成器集成电路 (IC) 可为逻辑器件提供参考信号的稳定定时脉冲，这些器件包括计算机、微控制器、数据通信系统和图形/视频发生器。这些集成电路可能包括缓冲器、驱动器、分频器、倍频器、多路复用器、合成器、扇出分配器和预分频器。