ADI ADF4355微波寬帶(54-6800 MHz)頻率合成器解決方案

1、ADI ADF4355微波寬帶(546800 MHz)頻率合成器解決方案ADI公司的ADF4355是微波寬帶(54-6800MHz)可實現(xiàn)小數(shù)N分頻或整數(shù)N分頻鎖相環(huán)(PLL)的頻率合成器,高分辨率38位模數(shù),低相位噪聲電壓控制振蕩器(VCO),可編程1/2/4/8/16/32/64分頻輸出,模擬和數(shù)字電源為3.3 V,主要用在無線基礎(chǔ)設(shè)施（W-CDMA,TD-SCDMA,WiMAX,GSM, PCS,DCS,DECT）,點到點/點到多點微波鏈路,衛(wèi)星/VSAT ,測試設(shè)備/儀器儀表和時鐘產(chǎn)生.本文介紹了ADF4355主要特性,框圖和幾種應(yīng)用電路,以及評估板EV-ADF4355SD1Z主要特性

2、,電路圖,材料清單和PCB設(shè)計圖.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 integ

3、rated 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

4、stage can be muted. The mute function is both pin and software controllable. Control of all on-chip registers is through a simple 3-wire interface. The ADF4355 operates with analog and digital power supplies ranging from 3.15 V to 3.45 V, with charge pump and VCO supplies from 4.75 V to 5.25 V.

5、 The ADF4355 also contains hardware and software power-down modes.ADF4355主要特性:RF output frequency range: 54 MHz to 6800 MHz Fractional-N synthesizer and integer-N synthesizer High resolution 38-bit modulus Low phase noise, voltage controlled oscillator (VCO) Programmable divide b

6、y 1, 2, 4, 8, 16, 32, or 64 output Analog and digital power supplies: 3.3 V Charge pump and VCO power supplies: 5.0 V typical Logic compatibility: 1.8 V Programmable dual modulus prescaler of 4/5 or 8/9 Programmable output power level RF output mute function 3-wire

7、 serial interface Analog and digital lock detect ADF4355應(yīng)用:Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT) Point to point/point to multipoint microwave links Satellites/VSATs Test equipment/instrumentation Clock generation圖1.ADF4355功能框圖圖2. ADF4355

8、直接轉(zhuǎn)換調(diào)制器電路圖圖3. ADF4355功電源電路圖評估板EV-ADF4355SD1ZThe EV-ADF4355SD1Z evaluates the performance of the ADF4355 frequency synthesizer with integrated VCO for phase-locked loops (PLLs). A photograph of the evaluation board is shown in Figure 1. The evaluation board contains the ADF4355 frequency synthesizer

9、with integrated VCO, a differential 122.88 MHz reference (TCXO), a loop filter, a USB interface, power supply connectors, and subminiature Version A (SMA) connectors. A USB cable is included to connect the board to a PC USB port. For easy programming of the synthesizer, download the Windows-based so

10、ftware from This board requires an SDP-S (shown in Figure 1, but not supplied with the kit). The SDP-S allows software programming of the EV-ADF4355SD1Z device.評估板EV-ADF4355SD1Z主要特性:Self contained board, including ADF4355 frequencysynthesizer with integrated VCO, differential 122.88 MHztemperature c

11、ontrolled crystal oscillator (TCXO), loopfilter (20 kHz), USB interface, and voltage regulators Windows®-based software allows control of synthesizer functions from a PC Externally powered by 6 V圖4.評估板EV-ADF4355SD1Z外形圖圖5.評估板EV-ADF4355SD1Z電路圖(1)圖6.評估板EV-ADF4355SD1Z電路圖(2)圖7.評估板EV-ADF4355SD1Z電路圖(3)評估板EV-ADF4355SD1Z材料清單:圖8.評估板EV-