AD8638 Gain issue

Dears,

        There's application that use AD8638 in RF receive front end. And  use it under third order intermodulation situation(input signal frequency is 60MHz) there just up to 28dBm(and the data sheet note it can meet 33dBm)  . Does there any advice or solve way to implement to the max gain in this application ?

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  • 0
    •  Analog Employees 
    on Dec 20, 2018 1:58 AM

    Hi,

    Can you confirm whether it really is AD8638. AD8638 is a 16 V Auto-Zero, Rail-to-Rail Output Operational Amplifiers whose GBW can only go up to 1.5MHz. Your input frequency is way beyond the op-amps specification, in turn will greatly degrade the output.

    What is your input signal? Where does it come from? What is your current op-amp config?

    Regards,
    Goz

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  • 0
    •  Analog Employees 
    on Dec 20, 2018 1:58 AM

    Hi,

    Can you confirm whether it really is AD8638. AD8638 is a 16 V Auto-Zero, Rail-to-Rail Output Operational Amplifiers whose GBW can only go up to 1.5MHz. Your input frequency is way beyond the op-amps specification, in turn will greatly degrade the output.

    What is your input signal? Where does it come from? What is your current op-amp config?

    Regards,
    Goz

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