LT6600 input reference for current source

I'm considering using a fully-differential amp like the LT6600 as a buffer amp for a DAC that has a differential current output. Normally, one would run the output from the DAC through a 200 Ohm resister to ground. For an op-amp like the LT6600, is the input pin, after the input resister, considered to be at the reference voltage, so that Vin provides the proper resistance? Or how best would one connect such a device to a fully differential amp?

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    •  Analog Employees 
    on Jun 17, 2020 12:44 AM

    Hi Pblase,

    There is actually a section on the datasheet that shows how to interface between this amplifier and a current output DAC. 

    It shows the gain transfer function as well as the computation of the DAC voltage which is a factor of the R1, R2, the Vmid and the DAC output current.

    Let me know if this answer your question.

    Best regards,

    Emman