有线通信


有线基础设施已经得到快速发展。供应商正在将IP网络技术和光通信集成到网络中,提供多服务、带宽及多频道选择。尽管有线服务供应商最初仅提供下行通信链路,但现在提供基于电缆数据传输业务规范(DOCSIS)标准的双向链路。

用于有线基础设施的业界领先、高性能RF IC提供较宽动态范围,优化宽带通信设计的信号链性能。



应用


边缘QAM和RF-DAC

Maxim的高密度下行有线QAM调制器和数字上变频混频(DUC)具有QAM映射、脉冲成形和前向纠错(FEC) (全捷变编码数据)的数字RF上变频功能。这些器件驱动高速RF-DAC与RF信号数字同步,提供功耗极低的高密度QAM调制。这些RF IC优化宽带通信设计的信号链性能。

RF DAC和DUC

低噪声放大器

有线电视通信设备中的大量应用(包括头端和终端)要求特殊的低噪声放大器。

可变增益放大器将信号驱动至电缆,低噪声、低失真放大器从电缆接收信号。上行电缆数据(DOCSIS)放大器将上行通道驱动到电缆并返回到头端。

宽带RF发送器 
TV调谐器 


精选产品


业内功耗最低的上行放大器,用于DOCSIS 3.0系统

MAX3518

集成的CATV上行放大器IC,设计用于满足DOCSIS 3.0的要求,功耗仅为1.25W。放大器覆盖5MHz至85MHz输入频率范围(3dB带宽为275MHz),能够传输四路同时位于该频率范围的QPSK调制载波信号,每路信号为+58dBmV。

4.6Gsps电缆下行RF直接合成器DAC

MAX5882

14位、4.6Gsps数/模转换器(DAC),将电缆调制解调器终端(CMTS)和EQAM设备的多载波正交调幅(QAM)信号直接合成为RF输出。


方案


有线方案提供关于设计有线电视通信设施的附加信息,包括典型设计的例子和方框图。

电缆调制解调器终端系统(CMTS) - Rx

Advanced Backplane Switch/Router Card Signal Integrity Signal Integrity Secure Memory (SHA-1) Secure Memory (SHA-1) PLL/Synthesizer PLL/Synthesizer Power Detect Power Detect Monitor and Control Low-Noise Amplifier (LNA) Low-Noise Amplifier (LNA) Power Management Switching Regulator Linear Voltage Regulator Thermal Management High-Speed Analog-to-Digital Converter (ADC) High-Speed Analog-to-Digital Converter (ADC) 电缆调制解调器终端系统(CMTS) - Rx

边缘QAM (EQAM)和电缆调制解调器终端系统(CMTS) - Tx

Advanced Backplane Switch/Router Card Signal Integrity Signal Integrity Secure Memory (SHA-1) Secure Memory (SHA-1) Digital Up-Converter (DUC) Digital Up-Converter (DUC) PLL/Synthesizer PLL/Synthesizer Variable-Gain Amplifier (VGA) Variable-Gain Amplifier (VGA) Monitor and Control Logarithmic Amplifier Logarithmic Amplifier Power Management Switching Regulator Linear Voltage Regulator Thermal Management High-Speed Digital-to-Analog Converter (DAC) High-Speed Digital-to-Analog Converter (DAC) 边缘QAM (EQAM)和电缆调制解调器终端系统(CMTS) - Tx

光节点数字回路

Thermoelectric Control (TEC) Thermoelectric Control (TEC) Laser Driver Laser Driver Laser Monitor and Control Laser Monitor and Control Serializer Serializer Secure Memory (SHA-1) Power Detector Power Detector PLL/Synthesizer Monitor/Control Low-Noise Amplifier (LNA) Low-Noise Amplifier (LNA) Power Management Switching Regulator Linear Voltage Regulator Thermal Management High-Speed Analog-to-Digital Converter (ADC) High-Speed Analog-to-Digital Converter (ADC) High-Speed Analog-to-Digital Converter (ADC) High-Speed Analog-to-Digital Converter (ADC) 光节点数字回路

嵌入式多媒体终端适配器

Linear Voltage Regulator Power Management Switching Regulator Battery Management Switch Debounce Step-Up Power ESD Protection RS-232 USB Interface GPIO Expander Wi-Fi XCVR Upstream Amplifier Low-Noise Amplifier (LNA) 嵌入式多媒体终端适配器

交换机/路由器接口卡

Backplane Interface/Signal Integrity Backplane Clock Hot-Swap Control DC-DC Point-of-Load (PoL) Sequencing, Monitoring, and Margining TCXO/OCXO System Clocks Datalogging Memory Security RS-232 Temperature Sensors Reset and Watchdog Timer 交换机/路由器接口卡

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