RS-485接口

当以高数据速率或者长距离进行通信时，差分数据传输可在大多数应用中提供优良的性能。差分信号有助于消除在网络中作为共模电压出现的接地偏移和感应噪声信号的影响。RS-485 规约符合真正多点通信网络要求，并且该标准规定在一条单总线（2 线）上支持 32 个驱动器和 32 个接收器。有些 RS-485 收发器修改输入阻抗以便允许将多达 8 倍以上的节点数连接到相同总线。RS-485 最常见的应用是在工业环境下可编程逻辑控制器内部之间的通信。

其它常见应用还包括商店的收款机和远程仪器仪表。ADI 公司可提供一系列 RS-485/RS-422 收发器和 iCoupler® Isolated RS-485/RS-422 收发器以适合多种应用。Isolated RS-485Part#Results:8 Pwr Supply (Vnom) Isolation V (rms) Integrated Xformer Drvr ESD-Protection Fail Safe Data Rate Full-Half Duplex Drvr/Rcvr Enable of Nodes On Bus Available Packages 数据手册 DataSheet 下载 ADM2482E +3 to +5 & ISO +3

2.5 kV Yes 15 kV Open, Short 16Mbps Full, Half Yes 256 SOIC ADM2482E ADM2483 +3 to +5 & ISO +5

2.5 kV --- --- Open, Short 500kbps Half Yes 256 SOIC ADM2483 ADM2484E +3 to +5 & ISO +3 5 kV --- 15 kV Open, Short 500kbps Full, Half Yes 256 SOIC ADM2484E ADM2485 +3 to +5 & ISO +5

2.5 kV Yes --- Open 16Mbps Half Yes 50 SOIC ADM2485 ADM2486 +3 to +5 & ISO +5

2.5 kV --- --- Open 20Mbps Half Yes 50 SOIC ADM2486 ADM2487E +3 to +5 & ISO +3

2.5 kV Yes 15 kV Open, Short 500kbps Full, Half Yes 256 SOIC ADM2487E ADM2490E +3 to +5 & ISO +5 5 kV --- 8 kV Open 16Mbps Full No 32 SOIC ADM2490E ADM2491E +3 to +5 & ISO +5 5 kV --- 8 kV Open 16Mbps Full, Half Yes 32 SOIC ADM2491E ADM2582E3.3, 5

2.5 kV Yes 15 kV Open, Short 16Mbps Full, Half Yes 256 SOIC ADM2582E ADM2587E3.3, 5

2.5 kV Yes 15 kV Open, Short 500kbps Full, Half Yes 256 SOIC ADM2587E Interface, RS-485Part#Results:49 Pwr Supply (Vnom) Full-Half Duplex ESD-Protection Data Rate of Nodes On Bus Drvr/Rcvr Enable Fail Safe Available Packages 数据手册 DataSheet 下载 ADM2490E +3 to +5 & ISO +5 Full 8 kV 16Mbps 32 No Open SOIC ADM2490E ADM2485 +3 to +5 & ISO +5 Half --- 16Mbps 50 Yes Open SOIC ADM2485 ADM2483 +3 to +5 & ISO +5 Half --- 500kbps 256 Yes Open, Short SOIC ADM2483 ADM2486 +3 to +5 & ISO +5 Half --- 20Mbps 50 Yes Open SOIC ADM2486 ADN4667

3.3 --- 15 kV 400Mbps - Yes - SOIC, SOP ADN4667 ADN4668

3.3 --- 15 kV 400Mbps - Yes - SOIC, SOP ADN4668 ADM3070E

3.3 Full 15 kV 250kbps 256 Yes Open, Short SOIC ADM3070E ADM3071E

3.3 Full 15 kV 250kbps 256 No Open, Short SOIC ADM3071E ADM3488E

3.3 Full 15 kV 250kbps 32 No Open SOIC ADM3488E ADM3488

3.3 Full --- 250kbps 32 No Open SOIC ADM3488 ADM3074E

3.3 Full 15 kV 500kbps 256 No Open, Short SOIC ADM3074E ADM3490

3.3 Full --- 10Mbps 32 No Open SOIC ADM3490 ADM3491

3.3 Full --- 10Mbps 32 Yes Open DIP, SOIC, SOP ADM3491 ADM3490E

3.3 Full 15 kV 12Mbps 32 No Open SOIC ADM3490E ADM3491E

3.3 Full 15 kV 12Mbps 32 Yes Open SOIC ADM3491E ADM3076E

3.3 Full 15 kV 16Mbps 256 Yes Open, Short SOIC ADM3076E ADM3077E

3.3 Full 15 kV 16Mbps 256 No Open, Short SOIC ADM3077E ADM3486E3.3 Half 15 kV

2.5Mbps 32 Yes Open SOIC ADM3486E ADM3485

3.3 Half --- 10Mbps 32 Yes Open SOIC ADM3485 ADM3485E

3.3 Half 15 kV 12Mbps 50 Yes Open DIP, SOIC ADM3485E ADM3078E

3.3 Half 15 kV 16Mbps 256 Yes Open, Short SOIC ADM3078E ADM3075E

3.3 Half 15 kV 500kbps 256 Yes Open, Short SOIC ADM3075E ADM3072E

3.3 Half 15 kV 250kbps 256 Yes Open, Short SOIC ADM3072E ADM3483E

3.3 Half 15 kV 250kbps 32 Yes Open SOIC ADM3483E ADM3493

3.3 Half --- 250kbps 256 Yes Open SOIC ADM3493 ADM3483

3.3 Half --- 250kbps 32 Yes Open SOIC ADM3483 ADM3073E

3.3 Half 15 kV 500kbps 256 Yes Open, Short SOIC ADM3073E ADM2482E +3 to +5 & ISO +3 Full, Half 15 kV 16Mbps 256 Yes Open, Short SOIC ADM2482E ADM2484E +3 to +5 & ISO +3 Full, Half 15 kV 500kbps 256 Yes Open, Short SOIC ADM2484E ADM2487E +3 to +5 & ISO +3 Full, Half 15 kV 500kbps 256 Yes Open, Short SOIC ADM2487E ADM2491E +3 to +5 & ISO +5 Full, Half 8 kV 16Mbps 32 Yes Open SOIC ADM2491E ADM488 5 Full --- 250kbps 32 No Open DIP, SOIC ADM488 ADM489 5 Full --- 250kbps 32 Yes Open DIP, SOIC, SOP ADM489 ADM483E 5 Half 15 kV 250kbps 32 Yes Open DIP, SOIC ADM483E ADM4854 5 Full --- 115kbps 256 No Open, Short SOIC ADM4854 ADM4855 5 Full --- 500kbps 256 No Open, Short SOIC ADM4855 ADM4856 5 Full ---

2.5Mbps 256 No Open, Short SOIC ADM4856 ADM4857 5 Full --- 10Mbps 256 No Open, Short SOIC ADM4857 ADM4850 5 Half --- 115kbps 256 Yes Open, Short CSP, SOIC ADM4850 ADM487E 5 Half 15 kV 250kbps 128 Yes Open SOIC ADM487E ADM483 5 Half --- 250kbps 32 Yes Open SOIC ADM483 ADM4851 5 Half --- 500kbps 256 Yes Open, Short CSP, SOIC ADM4851 ADM1487E 5 Half 15 kV

2.5Mbps 128 Yes Open SOIC ADM1487E ADM485E 5 Half 15 kV

2.5Mbps 32 Yes Open SOIC ADM485E ADM4852 5 Half ---

2.5Mbps 256 Yes Open, Short CSP, SOIC ADM4852 ADM485 5 Half --- 5Mbps 32 Yes Open DIP, SOIC, SOP ADM485 ADM4853 5 Half --- 10Mbps 256 Yes Open, Short CSP, SOIC ADM4853 ADM1486 5 Half --- 30Mbps 50 Yes Open SOIC ADM1486 ADM1485 5 Half --- 30Mbps 32 Yes Open DIP, SOIC, SOP ADM1485