This document describes the stable temperature performance of the LTC5582 and LTC5583 series RMS detectors, and how to improve measurement accuracy through temperature compensation. These RMS detectors maintain stable performance in a temperature range of -40°C to 85°C, at frequencies up to 10GHz (LTC5582) or 6GHz (LTC5583). By using two external resistors for temperature compensation, the measurement error can be reduced to less than 0.5dB.
The document addresses the issue of varying ambient temperatures in base-station designs affecting the performance of RMS detectors like the LTC5582 and dual-channel LTC5583. It details a method to optimize temperature compensation to reduce output error to less than 0.5dB using only two off-chip resistors.
The LTC5582 and LTC5583 offer excellent stable temperature performance from -40°C to 85°C.
The temperature compensation can be implemented using only two off chip resistors, with no external circuitry required.
By optimizing temperature compensation at different frequencies, the error can be improved to less than 0.5dB.