New Analog Devices' Detector Measures RMS Power up to 70 GHz

Analog Devices LTC5597

Analog Devices has announced the new LTC5597 IC, a high accuracy RMS power detector that provides a very wide RF input bandwidth, from 100 MHz up to 70 GHz. This makes the device suitable for a wide range of RF and microwave applications, such as point-to-point microwave links, instrumentation and power control applications.

100 MHz to 70 GHz RMS Power Detector
100 MHz to 70 GHz RMS Power Detector.

The DC output voltage of the detector is an accurate representation of the average signal power applied to the RF input. The response is linear-in-dB with 28.5 mV/dB logarithmic slope over a 35 dB dynamic range with typically better than ±1 dB accuracy. The detector is particularly suited for measurement of waveforms with crest factor (CF) as high as 12 dB, and waveforms that exhibit a significant variation of the crest factor during measurement.

To achieve higher accuracy and lower output ripple, the averaging bandwidth can be externally adjusted by a capacitor connected between the FLTR and OUT pins.

Output Voltage vs Frequency
Output Voltage vs Frequency.

The enable interface switches the device between active measurement mode and a low power shutdown mode.


  • Ultra Wide Matched Input Frequency Range: 100 MHz to 70 GHz
  • 35 dB Linear Dynamic Range (< ±1 dB Error)
  • 28.5 mV/dB Logarithmic Slope
  • ±2 dB Flat Response from 100 MHz to 60 GHz
  • Accurate RMS Power Measurement of High Crest Factors (Up to 12 dB) Modulated Waveforms
  • Low Power Shutdown Mode
  • Low Supply Current: 33 mA at 3.3 V (Typical)
  • Small 2 mm × 2 mm Plastic DFN8 Package
  • Operating Temperature Range with Guaranteed Log-Slope and Log-Intercept:
    • I-Grade: −40 °C to 105 °C Rated
    • H-Grade: −40 °C to 125 °C Rated
  • ESD Rating:
    • 2500 V HBM,
    • 1500 V CDM


  • Point-to-Point Microwave Links
  • Instrumentation and Measurement Equipment
  • Military Radios
  • 5G, LTE, WiFi, Wireless Networks
  • RMS Power Measurement
  • Receive and Transmit Gain Control
  • RF PA Transmit Power Control
Demonstration Circuit 2932A - a High Accuracy RMS Power Detector Featuring the LTC5597 IC
Demonstration Circuit 2932A – a High Accuracy RMS Power Detector
Featuring the LTC5597 IC.

JLCPCP: 2USD 2Layer 5PCBs, 5USD 4Layer 5PCBs

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