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ISO1410: Hardware review_ISO1410BDWR

Manjunath G14
Expert 2075 points
Part Number: ISO1410

Hello TI Team,

Please find the attached schematic of "ISO1410BDWR" Isolated RS485 Transceiver and review the circuit.

Thanks

  • 0
    TI__Intellectual 1960 points

    Hi Manjunath:

    Thanks for sharing your schematic.

    The schematic looks good to us. You may use the following optional guidelines for additional noise immunity.

    • Use 1-kΩ to 10-kΩ pull-up or pull-down resistor for enable lines to limit noise currents in theses lines during transient events.
    • Use 10-kΩ pull-up on R output for a logic high when the receiver is disabled.
    • ISO1410 bus pins are protected against 16kV IEC 61000-4-2 ESD with respect to GND2. You may use a TVS diode to protect against higher voltage transients on the RS-485 bus. We recommend CDSOT23-SM712.

    Lastly, please make sure that C101 and C102 bypass capacitors are placed on the top layer and as near to the device pins as possible.

    Regards,

    Dushmantha

  • 0 in reply to Dushmantha Rajapaksha
    Expert 2075 points

    Hello Dushmantha,

    Thanks for the Quick review comments.

    My Answers are inlined below:

    1. Use 1-kΩ to 10-kΩ pull-up or pull-down resistor for enable lines to limit noise currents in theses lines during transient events.

    Manjunath : Noted and Updated in the design

    2. Use 10-kΩ pull-up on R output for a logic high when the receiver is disabled.

    Manjunath : Noted and Updated in the design

    3. ISO1410 bus pins are protected against 16kV IEC 61000-4-2 ESD with respect to GND2. You may use a TVS diode to protect against higher voltage transients on the RS-485 bus. We recommend CDSOT23-SM712.

    Manjunath : Noted and Updated in the design

    Please find the attached updated Schematic and review the same,

    Thanks

  • 0 in reply to Manjunath G14
    TI__Intellectual 1960 points

    Hi Manjunath:

    Updated schematic looks good.

    Regards,

    Dushmantha