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audio DAC needed

Kevin Krasinski
Intellectual 265 points
Other Parts Discussed in Thread: PCM1795, PCM1792A

I'm looking for an audio DAC that supports:

16-bit resolution

32 kHz Fs

line level out (can drive line level load ~600 Ohms)

differential output

I'll be interfacing with an FPGA, so I can so SPI config if needed. I'm trying to avoid a external driver.

Any solutions come to mind?

  • 0
    TI__Genius 9175 points

    Hello,

    Have you tired the parametric search tool found HERE?

    For audio, most of our DAC's will be greater than 16-bit resolution, but many are 16-bit compatible.

    Do have a requirements on number of channels; stereo/mono?

     

    Regards,

    -Matt

     

  • 0 in reply to Matthew Beardsworth
    Intellectual 265 points

    I've tried the parametric search, but the parameters you can filter on aren't useful for what I am trying to distinguish (There isn't a parameter for differential vs single ended output etc.).

    I'm hooking up to a FPGA, so I can make a 16-bit value a 24-bit value easily.

    I'm doing mono audio and am looking for a single or dual channel. I'll use multiple on the board if needed. I'm more focused on something that will give differential out with line levels with a line driver, Simple to setup etc.

    Thanks

    -Kevin

  • 0 in reply to Kevin Krasinski
    TI__Genius 9175 points

    Hi Kevin,

    I did some searching and I do not believe we have a differential output amplifier that is also a line driver. Our differential output DAC’s have differential current outputs using current steering requiring an I/V converter.

    For example the PCM1795 (Hardware Controlled) and PCM1792A (Software Controlled) are differential current outputs, but would meet your other requirements.

    Regards,

    Matt

  • 0 in reply to Matthew Beardsworth
    Intellectual 265 points

    Hi Matt, Thanks for looking for a diff driver. Since you don't have a DAC, I'll probably have to find a diff driver. This would give me the flexibility to go to a single ended DAC if needed.

    Do you know of a recommended differential line driver (600 Ohms)? I'd like to stay with a 0 to 5V solution.

    Let me know,

    Thanks,

    Kevin

  • 0 in reply to Kevin Krasinski
    TI__Genius 9175 points

    Hi Kevin,

    For differential line drivers, we have a very high performance unit designed for pro audio applications; the DR134 and DR135. The difference between these two parts is package type.

    See HERE

    They require bipolar rails but work with a minimum supply voltage of +/-4.5V, I would recommend +/-5V. They have a built in gain of 6dB and work well in nearly every application due to their large output current and ability to drive up to 1uf of direct capacitance.

    Regards,

    Matt