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XTR117 & HART compatibility

Brian Kindel
Prodigy 170 points
Other Parts Discussed in Thread: XTR117, XTR115, XTR116

The datasheet for the XTR115/XTR116 devices explicitly states that those devices are "COMPATIBLE WITH HART MODEM".  Is the XTR117 device also HART modem compatible?

  • 0
    TI__Intellectual 2940 points

    Hello Brian,

    The XTR117 is essentially the same device as the XTR115 and XTR116 without the on-board voltage reference.  The functionality of the device beyond this falls in line with the XTR115/6.  These devices do not have chopping output stages so they do not require the filtering required in our three-wire current transmitters.  Therefore, they are able to interface with HART modems while meeting the requirements of the HART protocol.  The following post contains an attachment with a couple of slides showing a possible interface containing an XTR115 with a HART modem.  This circuit utilizes the VREF of the XTR115 so it would have to be modified in order to accommodate the XTR117.

    http://e2e.ti.com/support/amplifiers/precision_amplifiers/f/14/p/352/1499.aspx#1499