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  • 普通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。

    隔离型RS-485接口,请参见数字隔离器选型表。

    普通RS-485接口 选型表

    Part#

    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

    *此处所列报价仅供预算参考,为美元报价(规定订量的单价,美国离岸价)。对于评估板和套件的报价是指1个单位价格。
    **
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