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DAC3482: Independent output channel control

Part Number: DAC3482

I would like to independently shut down either the I or Q output channel on this device while still using the complex mixer stage.  The latest version of the DAC3482 datasheet (August 2015) shows in Figure 73 (QMC Block Diagram) shows "qmc_gain[10:0]" as being applied to both channels.  However, the Register Map (Table 11) shows separate qmc_gainI and qmc_gainQ register entries.  I'm 99% sure this is just an oversight in the block diagram, but I would like to make sure before building any hardware.  Thanks.

  • Hi Chris,

    We are taking a look into your question, and will be back with you soon.

    Best Regards,

    Dan

  • Hi, Chris,

    The QMC block allows independent adjustment to I and Q path to allow suppression of the image from quadrature mixing. Table 11 is correct and showed two separate gain control.

    You may also sleep the DAC output independently on the analog core side if you wish to have additional power saving. Wake up time and control method are showing in the following: