ADI ADN4680E多点低压差分信号收发器(M-LVDS)解决方案

ADI公司的ADN4680E是四个多点低压差分信号收发器(M-LVDS)(驱动器和接收器对),工作频率高达125MHz或250MHz不归零(NRZ).每个收发器的驱动器和接收器半双工配置连接,使得每个收发器通过单独的使能引脚进行配置,可发送或接收数据.静电放电(ESD)保护在总线引脚高达±15 kV.收发器最适合用在高密度低动态功耗应用中.ADN4680E根据用在M-LVDS网络的标准TIA/EIA-899而设计.接收器检测总线状态,其差分输入低到±50 mV,共模电压范围−1 V 到+3.4 V.每个接收器引脚可选择为Type 1或Type 2接收器.Type 1接收器具有15mV滞后,所以,慢变化的信号或输入丢失不会引起输出振荡.Type 2接收器具有失调阈值,保证了输入开路时输出状态,总线是在空闲.器件采用48引脚7mmx7mm LFCSP封装,工作温度−40C 到 +105C.器件在总线引脚上有增强的ESD保护,≥±15 kV HBM(空气放电),≥±8 kV HBM(接触放电);≥±10 kV IEC 61000-4-2(空气放电),≥±8 kV IEC 61000-4-2(接触放电).所有引脚局有增强的±8 kV HBM ESD保护.主要用在底板和电缆多点数据通信,多点时钟分布,低功耗高速替代更短的RS-485链接,网络和无线基站架构,电网架构和继电器保护系统,SPI网络的差分延伸.本文介绍了ADN4680E主要特性,功能框图和半双工M-LVDS网络图,以及评估板EVAL-ADN4680EEBZ主要特性,电路图,材料清单和PCB设计图.

The ADN4680E comprises four multipoint, low voltage differentialsignaling (M-LVDS) transceivers (driver and receiver pairs) thatcan operate at up to 125 MHz, or 250 Mbps nonreturn to zero(NRZ). The driver and receiver of each transceiver are connected in

half-duplex configuration, which allows each transceiver to be configuredvia independent enable pins for either sending or receivingdata. Electrostatic discharge (ESD) protection of up to ±15 kV is implementedon the bus pins. The transceivers are optimized for low

dynamic power consumption for use in high density applications.

The ADN4680E is designed to the TIA/EIA-899 standard for use inM-LVDS networks and complement TIA/EIA-644 LVDS devices withadditional multipoint capabilities.

The receivers detect the bus state with a differential input of as littleas ±50 mV over a common-mode voltage range of ...