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1、ADI ADF4355微波宽带(546800 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评估板 EV-AD
2、F4355SD1Z主要特性 , 电路图 , 材料清单和PCB设计图 ., 以及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
3、 ADF4355 has an integratedVCOwitha fundamentaloutputfrequencyrangingfrom3400 MHz to 6800 MHz. In addition, the VCO frequency is connected to divide by 1,2, 4, 8, 16, 32, or 64 circuitsthatallowthe user to generateRF outputfrequenciesas low as 54 MHz. For applications that require isolation, the RF o
4、utput stage canbe 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 V to V, with charge pump and VCOsupplies from V to V. The ADF4355 also cont
5、ains hardware and software power-down modes.ADF4355主要特性 :RF output frequency range: 54 MHz to 6800 MHzFractional-N synthesizer and integer-N synthesizerHigh resolution 38-bit modulusLow phase noise, voltage controlled oscillator (VCO)Programmable divide by 1, 2, 4, 8, 16, 32, or 64 outputAnalog and
6、digital power supplies: VCharge pump and VCO power supplies: V typicalLogic compatibility: VProgrammable dual modulus prescaler of 4/5 or 8/9Programmable output power levelRF output mute function3-wire serial interfaceAnalog and digital lock detectADF4355应用 :Wireless infrastructure (W-CDMA, TD-SCDMA
7、, WiMAX, GSM, PCS, DCS, DECT)Point to point/point to multipoint microwave linksSatellites/VSATsTest equipment/instrumentationClock generation图功能框图图 2. ADF4355 直接转换调制器电路图图 3. ADF4355 功电源电路图评估板 EV-ADF4355SD1ZThe EV-ADF4355SD1Z evaluates the performance of the ADF4355 frequency synthesizer with integra
8、ted VCO for phase-locked loops (PLLs). A photograph of the evaluationboard is shown in Figure 1. The evaluation board contains the ADF4355 frequencysynthesizerwith integratedVCO, a differential MHzreference (TCXO), a loop filter,a USB interface, power supply connectors, and subminiature Version A (S
9、MA)connectors.A USB cable isincluded to connect theboard toa PC USB port.For easyprogramming of the synthesizer, download the Windows-based software fromThisboard requires an SDP-S (shown in Figure 1, but notsuppliedwiththe kit).The SDP-Sallows software programming of the EV-ADF4355SD1Z device.评估板 E
10、V-ADF4355SD1Z主要特性 :Self contained board, including ADF4355 frequencysynthesizer with integrated VCO, differential MHztemperature controlled crystal oscillator (TCXO), loopfilter (20 kHz), USB interface, and voltage regulators Windows? -based software allows control of synthesizer functions from a PC
11、 Externally powered by 6 V图 4. 评估板 EV-ADF4355SD1Z外形图图 5. 评估板 EV-ADF4355SD1Z电路图 (1)图 6. 评估板 EV-ADF4355SD1Z电路图 (2)图 7. 评估板 EV-ADF4355SD1Z电路图 (3)评估板 EV-ADF4355SD1Z材料清单 :图 8. 评估板 EV-ADF4355SD1Z PCB设计图 (1)图 9. 评估板 EV-ADF4355SD1Z PCB设计图 (2)图 10. 评估板 EV-ADF4355SD1Z PCB设计图 (3)图 11. 评估板 EV-ADF4355SD1Z PCB设计图 (4)图 12. 评估板 EV-ADF4355SD1Z PCB设计图 (5)图 13. 评估板 EV-ADF4355SD1Z PCB设计图 (6)
