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About the working modes

Xiang Chao
Intellectual 360 points

Other Parts Discussed in Thread: DAC3484, DAC3482

hi all,

After reading the datasheet of DAC3484, I have several questions:

1. If the mixers are disabled, can it be used as normal DAC with 4 independent channels?

2. If it is used in dual channel mode, according to the datasheet, only channel B and C are active. The parallel data interface will become same as DAC3482? That is, only data for channel B and C are interleaved at rising falling edge of the dac clock, and no need for channel A and D data. Is that so?

best regards

Xiang Chao

  • 0
    TI__Guru* 80595 points

    Xiang,

    1. The complex mixer/NCO is meant to be quadrature (I/Q) mixing. The signal going into the complex mixer/NCO will have to be quadrature. If the channels are independent, then there will be cross-components due to the complex mixing mathematics. All the mixing (except Fs/2) are not independent. If you disable the mixers, then you can use the DAC3484 with 4 independent channels.

    2. In DAC3482 mode, input channel A and B are used as input data bus. Input C and D are not used. The output muxing from the digital path to the analog path will automatically route the input channel A/B to output channel B/C.

    As always, you may search the forum for the DAC3484 related questions. We have tagged these types of questions in the forum and hopefully they are easier to search now.

    -Kang