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SN65HVD82: to transmit data and power

Yash Dave
Intellectual 620 points
Part Number: SN65HVD82
Other Parts Discussed in Thread: SN65HVD96, TIDA-00527, SN65HVD78, THVD1550

Hi,

One of my application is to transmit Data and Power using 2 wires only. we have identified SN65HVD75DR or SN65HVD82DR or SN65HVD96 for this. kindly support for below queries.

1. Which IC is better, SN65HVD75DR or SN65HVD82DR or SN65HVD96?

2. How much voltage and current can be generated?

3. Will it be sufficient to drive another controller for displaying?

4. Will it generate power continuously or only during data transmission?

5. Will it work with standard modbus protocol or any other format/technique required to be followed?
Which Series of IC is better, SN65HVD75DR or SN65HVD82DR or SN65HVD96?
How much voltage and current can be generated?
Will it be sufficient to drive another controller for displaying?
Will it generate power continuously or only during data transmission?
Will it work with standard modbus protocol or any other format/technique required to be followed?
OR
Data transmission using basic serial communication. Like UART?
  • 0
    TI__Guru 62910 points
    Hello,

    Are you able to share any more information about how you plan to combine data and power over the same lines? That may influence which transceiver makes the most sense to use. Are you planning on using a method similar to the one shown in TIDA-00527 (www.ti.com/.../TIDA-00527)

    Regards,
    Max
  • 0 in reply to Max Robertson
    Intellectual 620 points

    yes, 

    we are planning to use a method similar to the TIDA-00527.

    kindly support to answer quires in above thread.

  • 0 in reply to Yash Dave
    TI__Guru 62910 points
    Hello,

    In that case, it is important that the RS-485 data operates at a relatively high baud rate. This helps the data signals better pass through the AC-coupling capacitances (which form a high-pass filter with the end-of-line termination or with the transceiver input impedances). I would recommend SN65HVD78, then, if your available power supply voltage is 3.3 V or THVD1550 if the supply voltage will be 5 V.

    Note that SN65HVD96 operates a little differently than most RS-485 transceivers. It is designed to be polarity-immune, meaning the differential bus wires can be swapped and the link will still operate properly. If this feature is needed, then this would be a good device to consider. It would not be RS-485 compliant, though - this part uses its own "RS-485 like" signaling scheme.

    Regards,
    Max