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。

Isolated RS-485
Part# Results: 13 Pwr Supply (Vnom) Isolation Voltage Integrated isoPower Integrated Xformer Drvr ESD-Protection Fail Safe Data Rate RS-485 Full-Half Duplex Drvr/Rcvr Enable # of Nodes On Bus US Price 1000-4999
ADM2682E +3.3, +5 5KV rms Yes - 15 kV Open, Short 16Mbps Full, Half Yes 256 $7.5
ADM2687E +3.3, +5 5KV rms Yes - 15 kV Open, Short 500Kbps Full, Half Yes 256 $6.5
ADM2481 +3 to +5 & ISO +5 2.5KV rms - --- --- Open, Short 500Kbps Half Yes 256 $3.04
ADM2582E +3.3, +5 2.5KV rms Yes Yes 15 kV Open, Short 16Mbps Full, Half Yes 256 $6.5
ADM2587E +3.3, +5 2.5KV rms Yes Yes 15 kV Open, Short 500Kbps Full, Half Yes 256 $5.5
ADM2482E +3 to +5 & ISO +3 2.5KV rms - Yes 15 kV Open, Short 16Mbps Full, Half Yes 256 $4.66
ADM2484E +3 to +5 & ISO +3 5KV rms - --- 15 kV Open, Short 500Kbps Full, Half Yes 256 $3.04
ADM2487E +3 to +5 & ISO +3 2.5KV rms - Yes 15 kV Open, Short 500Kbps Full, Half Yes 256 $3.64
ADM2491E +3 to +5 & ISO +5 5KV rms - --- 8 kV Open 16Mbps Full, Half Yes 32 $4.76
ADM2485 +3 to +5 & ISO +5 2.5KV rms - Yes --- Open 16Mbps Half Yes 50 $5.57
ADM2490E +3 to +5 & ISO +5 5KV rms - --- 8 kV Open 16Mbps Full No 32 $4.55
ADM2483 +3 to +5 & ISO +5 2.5KV rms - --- --- Open, Short 500Kbps Half Yes 256 $3.04
ADM2486 +3 to +5 & ISO +5 2.5KV rms - --- --- Open 20Mbps Half Yes 50 $5.04
Interface RS-485
Part# Results: 56 Pwr Supply (Vnom) Full-Half Duplex ESD-Protection Data Rate RS-485 # of Nodes On Bus Drvr/Rcvr Enable Fail Safe Automotive Qualified US Price 1000-4999
ADM1485 +5 Half --- 30Mbps 32 Yes Open - $1.63
ADM1486 +5 Half --- 30Mbps 50 Yes Open - $2.07
ADM1487E +5 Half 15 kV 2.5Mbps 128 Yes Open - $1.32
ADM1490E +5 Full 8 kV 16Mbps 32 No Open - $1.15
ADM1491E +5 Full 8 kV 16Mbps 32 Yes Open - $1.15
ADM2481 +3 to +5 & ISO +5 Half --- 500Kbps 256 Yes Open, Short - $3.04
ADM2482E +3 to +5 & ISO +3 Full, Half 15 kV 16Mbps 256 Yes Open, Short - $4.66
ADM2483 +3 to +5 & ISO +5 Half --- 500Kbps 256 Yes Open, Short - $3.04
ADM2484E +3 to +5 & ISO +3 Full, Half 15 kV 500Kbps 256 Yes Open, Short - $3.04
ADM2485 +3 to +5 & ISO +5 Half --- 16Mbps 50 Yes Open - $5.57
ADM2486 +3 to +5 & ISO +5 Half --- 20Mbps 50 Yes Open - $5.04
ADM2487E +3 to +5 & ISO +3 Full, Half 15 kV 500Kbps 256 Yes Open, Short - $3.64
ADM2490E +3 to +5 & ISO +5 Full 8 kV 16Mbps 32 No Open - $4.55
ADM2491E +3 to +5 & ISO +5 Full, Half 8 kV 16Mbps 32 Yes Open - $4.76
ADM2582E +3.3, +5 Full, Half 15 kV 16Mbps 256 Yes Open, Short - $6.5
ADM2587E +3.3, +5 Full, Half 15 kV 500Kbps 256 Yes Open, Short - $5.5
ADM2682E +3.3, +5 Full, Half 15 kV 16Mbps 256 Yes Open, Short - $7.5
ADM2687E +3.3, +5 Full, Half 15 kV 500Kbps 256 Yes Open, Short - $6.5
ADM3070E +3.3 Full 15 kV 250Kbps 256 Yes Open, Short - $1.62
ADM3071E +3.3 Full 15 kV 250Kbps 256 No Open, Short - $1.57
ADM3072E +3.3 Half 15 kV 250Kbps 256 Yes Open, Short - $1.52
ADM3073E +3.3 Half 15 kV 500Kbps 256 Yes Open, Short - $1.62
ADM3074E +3.3 Full 15 kV 500Kbps 256 No Open, Short - $1.51
ADM3075E +3.3 Half 15 kV 500Kbps 256 Yes Open, Short Yes $1.52
ADM3076E +3.3 Full 15 kV 16Mbps 256 Yes Open, Short - $1.62
ADM3077E +3.3 Full 15 kV 16Mbps 256 No Open, Short - $1.57
ADM3078E +3.3 Half 15 kV 16Mbps 256 Yes Open, Short - $1.55
ADM3483 +3.3 Half --- 250Kbps 32 Yes Open - $0.91
ADM3483E +3.3 Half 15 kV 250Kbps 32 Yes Open - $1.32
ADM3485 +3.3 Half --- 10Mbps 32 Yes Open - $1.01
ADM3485E +3.3 Half 15 kV 12Mbps 32 Yes Open - $1.32
ADM3486E +3.3 Half 15 kV 2.5Mbps 32 Yes Open - $1.32
ADM3488 +3.3 Full --- 250Kbps 32 No Open - $0.91
ADM3488E +3.3 Full 15 kV 250Kbps 32 No Open - $1.32
ADM3490 +3.3 Full --- 10Mbps 32 No Open - $1.01
ADM3490E +3.3 Full 15 kV 12Mbps 32 No Open - $1.37
ADM3491 +3.3 Full --- 10Mbps 32 Yes Open - $1.37
ADM3491E +3.3 Full 15 kV 12Mbps 32 Yes Open - $1.42
ADM3493 +3.3 Half --- 250Kbps 256 Yes Open - $0.96
ADM483 +5 Half --- 250Kbps 32 Yes Open - $0.67
ADM483E +5 Half 15 kV 250Kbps 32 Yes Open - $1.27
ADM485 +5 Half --- 5Mbps 32 Yes Open - $1.31
ADM4850 +5 Half --- 115Kbps 256 Yes Open, Short - $0.71
ADM4851 +5 Half --- 500Kbps 256 Yes Open, Short - $0.71
ADM4852 +5 Half --- 2.5Mbps 256 Yes Open, Short - $0.71
ADM4853 +5 Half --- 10Mbps 256 Yes Open, Short - $0.71
ADM4854 +5 Full --- 115Kbps 256 No Open, Short - $0.71
ADM4855 +5 Full --- 500Kbps 256 No Open, Short - $0.71
ADM4856 +5 Full --- 2.5Mbps 256 No Open, Short - $0.71
ADM4857 +5 Full --- 10Mbps 256 No Open, Short - $0.71
ADM485E +5 Half 15 kV 2.5Mbps 32 Yes Open - $1.32
ADM487E +5 Half 15 kV 250Kbps 128 Yes Open Yes $1.32
ADM488 +5 Full --- 250Kbps 32 No Open - $1.11
ADM488A +5 Full - 250Kbps 32 No - - $0.9
ADM489 +5 Full --- 250Kbps 32 Yes Open - $1.62
ADM489A +5 Full - 250Kbps 32 Yes - - $1.05