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OPA683 Complementary Current Output DAC Single-Ended Interface

Venugopal YS
Prodigy 20 points

Hi all,

I am using a complementary current output DAC. The two outputs should be converted to a single ended signal with amplification. The frequency that i am generating is from 3MHz to 32MHz.

Recently i came across http://www.ti.com/lit/an/sbaa135/sbaa135.pdf and http://www.ti.com/litv/zip/sbaa135. These  were very helpful. 

The excel spreadsheet gives me values for a dual supply opamp design. But i am using a single supply of 5V. How should i configure the opamp in single supply and also match impedances...? Could anyone please post a circuit if u have done so...?

 

With regards,

Venugopal YS

  • 0
    TI__Genius 13935 points

    Hello Venugopal,

    With single supplies you will need to shift the common mode of the DAC to that of the op amp, or you can use an op amp with an input common mode range that goes below the negative rail. 

    It may be easier to add a -5V supply. 

    Loren