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  2. RF and Microwave
  3. RF Power Detectors
  4. Logarithmic RMS Detectors
  5. HMC1120


Features and Benefits

  • Broadband Single-Ended RF Input
  • RMS Detector with ±1 dB Detection Accuracy to 3.9 GHz
  • Input Dynamic Range:
    -60 dBm to +8 dBm
  • ±1 dB Envelope Detection Accuracy over 30 dB Input Range
  • Envelope Detection Bandwidth > 150 MHz
  • Digitally Programmable Integration Bandwidth 
  • Power-Down Mode
  • 24 Lead 4x4mm SMT Package: 16mm²
  • Envelope Tracking Power-Down Mode

Product Details

The HMC1120 is an RMS power detector with an integrated high bandwidth envelope detector. The RMS output is a temperature compensated, monotonic, linear-in-dB representation of real RF signal power, measured over an input sensing range of 70 dB. The envelope detector provides an accurate voltage output which is linearly proportional to the amplitude envelope of the RF input signal for modulation bandwidths up to 150 MHz. The high bandwidth envelope detection of the HMC1120 makes it ideal for detecting broadband and high crest factor RF signals commonly used in GSM, WCDMA, and LTE systems. Additionally, the instantaneous envelope output can be used to create fast, excessive RF power protection, PA linearization, and efficiency enhancing envelope-tracking PA implementations.

The HMC1120’s RMS detector integration bandwidth is digitally programmable via input pins SCI1-4 over a range of more than 4 decades. This allows the user to dynamically set the operation bandwidth and also permits the detection of different types of modulations on the same platform.

The HMC1120 features an internal op-amp at the RMS output stage, which accommodates slope and intercept adjustments and supports a wide range of applications.


  • Log –> Root-Mean-Square (RMS) Conversion
  • Tx/Rx Signal Strength Indication (TSSI / RSSI)
  • RF Power Amplifier Efficiency Control
  • Receiver Automatic Gain Control
  • Transmitter Power Control
  • Envelope Tracking
  • PA Linearization

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
HMC1120LP4E Material Declaration Reliability Data 24-Lead QFN (4mm x 4mm w/ EP)
HMC1120LP4ETR Material Declaration Reliability Data 24-Lead QFN (4mm x 4mm w/ EP)
Wafer Fabrication Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.