Wide-dynamic-range, high-accuracy RF power detectors

December 18, 2013 // By Graham Prophet
Analog Devices has added two RF power detectors with wide dynamic range and high levels of accuracy and temperature stability.

ADL5903 is a solution for a variety of high frequency systems requiring accurate measurement of signal power independent of waveform characteristics. The ADL5506 RF detector is a complete subsystem for the measurement of RF signals in a wide range of wireless terminal devices. Both detectors come in small packages with low-power operation.

Features of the ADL5903 include;

  1. Single-ended input dynamic range of 35 dB, 50Ω source-compatible
  2. Accurate RMS-to-DC conversion from 200 MHz to 6 GHz
  3. Linear in decibels output, scaled 35.5 mV/dB at 900 MHz
  4. Waveform and modulation independent 

Features of the ADL5506 include;

  1. Typical dynamic range: 45 dBm to 0 dBm
  2. Frequency range from 30 MHz to 4.5 GHz
  3. Stable linear-in decibel response
  4. Low power: 3.8 mA at 3V (with < 1 µA in Disable Mode)