Recommended 1.8V regulator for 8 DDS chips

Hi ,

I am using 8 DDS chips (AD9959) for one of my design. Please recommend a 1.8V regulator for the DDS chips.

It would be better if you suggest a single regulator which can supply all 8 Chips.

Thanks in advance,

Regards,

Prakash B J

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  • 0
    •  Analog Employees 
    on Jun 13, 2014 7:36 AM


    Hi Prakash BJ,

    The AVDD and DVDD supply pins of the AD9959 draws a maximum of 325mA when all channels are turned on.

    The 800mA maximum output current of the ADM7160 can only supply up to two DDS chips.

    There are higher current output LDOs such as the ADP1706/7/8 (1A), ADP3338/9(1A.1.5A) which you can use for more than three or four DDS chips respectively. The trade-off would be that you would have greater noise at the supply pins.

    Regards,

    Rainier

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  • 0
    •  Analog Employees 
    on Jun 13, 2014 7:36 AM


    Hi Prakash BJ,

    The AVDD and DVDD supply pins of the AD9959 draws a maximum of 325mA when all channels are turned on.

    The 800mA maximum output current of the ADM7160 can only supply up to two DDS chips.

    There are higher current output LDOs such as the ADP1706/7/8 (1A), ADP3338/9(1A.1.5A) which you can use for more than three or four DDS chips respectively. The trade-off would be that you would have greater noise at the supply pins.

    Regards,

    Rainier

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