ADI ADCA3270功率倍增放大器(MMIC)CATV解决方案

ADI公司的ADCA3270是24V功率倍增放大器微波单片集成电路(MMIC),1218 MHz时的功率增益为25dB.采用砷化镓(GaAs),高电子迁移率晶体管异质结构(pHEMT)和氮化镓(GaN) HEMT技术,进行先进的电路设计,器件的RF输出功率高达73 dBmV复合功率.DC电流和电源电压可由外部进行调整,以得到输出电平范围内的最佳失真性能和功率损耗. ADCA3270提供高增益,简化了设计和制造DOCSIS 3.1基础设备.工作频率为45 MHz 到1218 MHz.器件可替代RFCM3327和RFCM3328.具有极好的线性和非常低的失真:复合三次差拍(CTB)典型值为-80dBc, 复合二次失真(CSO)典型值为-80dBc, 载波互调噪声为59dB, 噪声系数在45MHz时为3dB,在1218MHz时为4dB.器件具有无条件的稳定性,可配置的电流在24V为350mA到480A.器件还集成了温度监视器.主要用在45 MHz 到 1218 MHz社区接入电视(CATV)和遥控DOCSIS 3.1兼容的物理层(PHY).本文介绍了ADCA3270主要特性,功能框图和简化电路图,以及评估板ADCA3270-EVALZ主要特性,电路图和材料清单与PCB设计图.

The Analog Devices, Inc., ADCA3270 is a 24 V power doubler, monolithic microwave IC (MMIC) with 25 dB of power gain. The device achieves high RF output up to 73 dBmV composite power under 18 dB tilt conditions by using advanced circuit design techniques with gallium arsenide (GaAs), pseudomorphic high electron transistor (pHEMT), and gallium nitride (GaN) HEMT technologies. The dc current and supply voltage can be adjusted externally for optimum distortion performance vs. power consumption over a range of output levels. The ADCA3270 provides high gain, simplifying the design and manufacturing of DOCSIS 3.1 infrastructure equipment.

The ADCA3270 is packaged in a 9-terminal thermally enhanced chip array small outline no lead cavity [LGA_CAV] with an industry-standard footprint.

ADCA3270主要特性:

Drop-in replacement for RFCM3327 and RFCM3328

Total composite power: 73 dBmV

High power gain: 25 dB at 1218 MHz

Excellent linearity

Very low distortion

Composite triple beat: −80 dBc typical

Composite second-order: −80 dBc typical

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