Maximum digital potentiometer frequency

Can I adjust the digital potentiometer for frequencies around 1MHz to 10MHz for adjusting the gain of a video signal?

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  • 0
    •  Analog Employees 
    on May 16, 2011 8:38 AM

    It depends. Bandwidth is a function of the code and end-to-end resistance RAB. Lower RAB and codes yield higher bandwidth.

    10MHz bandwidth or above is possible  if you use a 1 kΩ version of AD8400, AD5273 and limit your codes to a  low value range or using the AD5258 with a full code range.

    Typically a plot is included showing the maximum bandwith (frequency) versus code.

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  • 0
    •  Analog Employees 
    on May 16, 2011 8:38 AM

    It depends. Bandwidth is a function of the code and end-to-end resistance RAB. Lower RAB and codes yield higher bandwidth.

    10MHz bandwidth or above is possible  if you use a 1 kΩ version of AD8400, AD5273 and limit your codes to a  low value range or using the AD5258 with a full code range.

    Typically a plot is included showing the maximum bandwith (frequency) versus code.

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