DESCRIPTION
Demonstration circuit 1599A is a Mean-Squared Power
Detector featuring the LTC®5583 IC. LTC5583 is a
dual-channel RMS power detector, capable of
measuring two AC signals. It provides 40dB of
channel to channel isolation with no frequency
separation at 2140MHz that is suited for measuring
VSWR.
The LTC5583 is a wide dynamic range Mean Squared
RF Power Detector, operational from 40MHz to 6GHz.
The input dynamic range with ±1dB nonlinearity is
60dB depending on frequency(from –58dBm to
+2dBm, single-ended 50 input). The detector output
voltage slope is normally 30mV/dB, and the typical
output variation over temperature is ±0.5dB at
880MHz.
The DC1599A Demo Circuit is ideal for frequency
operation below 3.0GHz. It has the single ended input
drive to LTC5583. The input A to output B (or input B
to output A) isolation is 33dB at 2.7GHz, and degrades
as input frequency increases. As a result, operating
above 3GHz may require differential input matching for
improved isolation. Temperature performance is
optimized for 2140MHz. Contact LTC applications for
more information.
LTC is a trademark of Linear Technology Corporation
Design files for this circuit board are available. Call the
LTC factory.