ADI ADF4355微波宽带(54－6800 MHz)频率合成器解决方案
ADI公司的ADF4355是微波宽带(54-6800MHz)可实现小数N分频或整数N分频锁相环(PLL)的频率合成器,高分辨率38位模数,低相位噪声电压控制振荡器(VCO),可编程1/2/4/8/16/32/64分频输出,模拟和数字电源为3.3 V,主要用在无线基础设施（W-CDMA,TD-SCDMA,WiMAX,GSM, PCS,DCS,DECT）,点到点/点到多点微波链路,卫星/VSAT ,测试设备/仪器仪表和时钟产生.本文介绍了ADF4355主要特性,框图和几种应用电路,以及评估板EV-ADF4355SD1Z主要特性,电路图,材料清单和PCB设计图.
The ADF4355 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 frequency. A series of frequency dividers permits operation from 54 MHz to 6800 MHz.
The ADF4355 has an integrated VCO with a fundamental output frequency ranging from 3400 MHz to 6800 MHz. In addition, the VCO frequency is connected to divide by 1, 2, 4, 8, 16, 32, or 64 circuits that allow the user to generate RF output frequencies as low as 54 MHz. For applications that require isolation, the RF output stage can be muted. The mute function is both pin and software controllable.
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