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ADL5903 Aging


We use this RMS power detection for L-band (1-2 GHz) level monitoring.

We built a look up table (calibration) per unit. 

Can Analog Devices supply aging data for ADL5902?

Do we need to recalibrate power detector after some years?

Each how many years?

Operating temperature range is from -40C to 70C, also calibrated for each unit.

Can Analog Devices advise anything that we can do in our side to avoid or compensate for the aging issue?

Please advise.

  • Hi fnoriega,

    Which part are you using, ADL5902 or ADL5903? Both are mentioned above.

    Can you tell us, what is the magnitude of the long term drift that you observe? How does that compare to your requirement?

    We always recommend in-system calibration for detector ICs such as these. It's clear that you do this now, which is good. 

    Kindly note, however, that for these two devices, we generally would NOT recommend an individual in-system calibration for temperature drift. Instead, we would recommend that the application should accept the temperature drift of the part, which in this case would be quite good, +/- 0.2 to 0.4 dB, depending on the part and other specifics. The reason is that the devices are already internally compensated for temperature variation. Applying an external compensation 'on top of' the internal compensation could be making the problem worse rather than better. 

  • Hi Bruce,

    Sorry, I'm using ADL5903.

    We didn´t start testing yet, but our client ask us about the neccessity of recalibrations after some years.

    Could you clarify abour this topic?

    Thanks in advance

    Have a nice week

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