ADIADF4355微波宽带(54-6800MHz)频率合成器解决处理办法

1、ADI ADF4355 微波宽带(54 - 6800 MHz) 频率合成器解决方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)，点到点/点到多点微波链路，卫星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, P CSQCSQECT /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-ADF4355S

2、D1Z 主要特性，电路图材料清单和PCB设计图.The ADF4355 allows impi eme ntatio n of fraction al-N or in teger-N p hase-locked loop (P LL) freque ncy syn thesizers whe n used with an exter nal I oop filter and an exter nal reference freque ncy. A series of freque ncy dividers p ermits op eratio n from 54 MHz to 6800 MH

3、z.The ADF4355 has an in tegrated VCO with a fun dame ntal out put freque ncy ranging from 3400 MHz to 6800 MHz. In additio n, the VCO freque ncy is conn ected to divide by 1,2, 4, 8, 16, 32, or 64 circuits that allow the user to gen erate RF out put freque ncies as low as 54 MHz. For app licatio ns

4、that require isolati on, the RF out put stage can be muted. The mute fun ctio n is both pin and software con trollable.Con trol of all on-chip registers is through a sim pie 3-wire in terface. The ADF4355 op erates with an alog and digital po wer supp lies ranging from 3.15 V to 3.45 V, with charge

5、pump and VCO suppl ies from 4.75 V to 5.25 V. The ADF4355 also contains hardware and software po wer-dow n modes.ADF4355 主要特性：RF out put freque ncy range: 54 MHz to 6800 MHzFract ion al-N syn thesizer and in teger-N syn thesizerHigh resoluti on 38-bit modulusLow p hase no ise, voltage con trolled os

6、cillator (VCO)P rogrammable divide by 1,2, 4, 8, 16, 32, or 64 out putAn alog and digital po wer supp lies: 3.3 VCharge pump and VCO po wer supp lies: 5.0 V typ icalLogic comp atibility: 1.8 VProgrammable dual modulus p rescaler of 4/5 or 8/9Programmable out put po wer levelRF out put mute function

7、3-wire serial in terfaceAn alog and digital lock detectADF4355 应用:Wireless in frastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, P CS, DCS, DECT)Point to point/point to mult ipoint microwave linksSatellites/VSATsTest equipment/in strume ntati onClock gen erati on-CLXRAMI.EutO-V oId BIT AJ tSfCOUMTfB*3 nwcj

8、tINTEGERREGISTERU UOVHTEALATCHI皿DETGf LTIKEJCEHPHASE COUPJkAATOACWJCtThCRD-OHDEnFRA I： no 喫mjjHDDULUaS-TtR III iPtQRlTPCQCEUUHOVTRE4WTTOBbOLiTFUT ti/v4 OUTPUT *斗出応WlXTICTt uuinoiFJCFP图1.ADF4355 功能框图HOUTUiwru.fl申冲1咔加*屮?斗_InSic柚LE I 从 L上皿L LBijnK.噩WUUTiRFOlfTIDUA帶4同 時*!* bdjBCAM*1 幅 j图2. ADF4355直接转换调制

9、器电路图w ranMl 鼻口FAFFMPVTiF右 HEFafWSf丹WWTADU71HtHHPRTFVr_*Eh4C&IP5图3. ADF4355 功电源电路图评估板 EV-ADF4355SD1ZS11审“ v- WU叫M:WAFFW VT十翠*Mij&The EV-ADF4355SD1Z evaluates the performa nee of the ADF4355 freque ncy syn thesizer with in tegrated VCO for p hase-locked loops (P LLs). A p hotogra ph of the evaluatio n

10、 board is show n in Figure 1. The evaluati on board contains theADF4355 freque ncy syn thesizer with in tegrated VCO, a differe ntial 122.88 MHz reference (TCXO), a loop filter, a USB in terface, po wer supply conn ectors, and subm in iature Version A (SMA) conn ectors. A USB cable is in cluded to c

11、onn ect the board to a PC USB port. For easy p rogram ming of the syn thesizer, dow nl oad theWin dows-based software from This board requires anSDP-S (show n in Figure 1, but n ot supplied with the kit). The SDP-S allows software programmi ng of the EV-ADF4355SD1Z device.评估板EV-ADF4355SD1Z 主要特性：Self

12、 contained board, in cludi ng ADF4355 freque ncy syn thesizer with in tegrated VCO, differe ntial 122.88 MHz temp erature con trolled crystal oscillator (TCXO), lo op filter (20 kHz), USB in terface, and voltage regulatorsWin dows?-based software allows con trol of syn thesizer functions from a PCEx

13、ter nally po wered by 6 VLjiHfHh fI歸:血, p: *二 : -1图4.评估板EV-ADF4355SD1Z 外形图tli詈 J-jl 希 U.I H3iUJs t 二fkM.JilHsWwj1?孔二V m H3_r Ksn.1 _ thr-I Mil *.PW乜！ I列 HE二 孚匕宦 賈昙；I證誓蚂覽*_z jih孟f2- PHI /tKBZ 3IV I -w TH 444严-9 UA皆备義痢睜b T tHUr H1*1氏逗皐t華寄r +图5.评估板EV-ADF4355SD1Z 电路图 saHgm rxr訓 Stl仙eE_,1514s (2)3LECAT*:

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