Input impedanc of TIA, ADN2820

I want to use AD's 10Gbps TIA after RF amplifier which has a output impedance of 50ohm. For impedance matching between output of RF amplifier and input of 10Gbps TIA, I need a information of input impedance of 10Gbps TIA.

If the difference is not large, it is bingo!

Thank you in advance.

Best regards

Park.

Parents
    •  Analog Employees 
    on Oct 13, 2016 5:00 PM

    Dear Park,

    ADN2820 is one of quantizer type of TIA products. ADN2820 input expects a signal current source with huge output impedance, such as a photo-diode. ADN2820 input is clamped by an internal voltage reference to 0.85V.

    If your RF device output impedance is 50ohm, and the output is in RF voltage, ADN2820 might not be a right 10G amplifier to work with your RF device directly.

    Best Regards,

    Dongfeng

Reply
    •  Analog Employees 
    on Oct 13, 2016 5:00 PM

    Dear Park,

    ADN2820 is one of quantizer type of TIA products. ADN2820 input expects a signal current source with huge output impedance, such as a photo-diode. ADN2820 input is clamped by an internal voltage reference to 0.85V.

    If your RF device output impedance is 50ohm, and the output is in RF voltage, ADN2820 might not be a right 10G amplifier to work with your RF device directly.

    Best Regards,

    Dongfeng

Children
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