I am working on a device for a large-scale scientific project and need an accurate power measurement of noise-like signals. The project's current scope will require thousands of units to be produced. As such, I'm looking for an RMS true power detector that does not require per-board calibration. One such device, the AD8362, mentions that it is factory calibrated with a 50 mV/dB slope and -60 dBm intercept. This device seems well suited for this purpose but seems to be out of date in other respects. The datasheet lists several alternatives as "Next generation upgrades" for the AD8362, but all require a per-board calibration. Is this actually the case? Are there any other true RMS-responding products that do not require calibration? For more context, our application is <2 GHz and requires measured powers down to -40 dBm. Thank you.
