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  2. RF and Microwave
  3. Attenuators
  4. Digital Step Attenuators
  5. ADRF5731

Alternative Parts


Features and Benefits

  • Ultrawideband frequency range: 100 MHz to 40 GHz
  • Attenuation range: 2 dB steps to 30 dB
  • Low insertion loss
    • 1.7 dB to 18 GHz
    • 2.2 dB to 26 GHz
    • 3.5 dB to 40 GHz
  • Attenuation accuracy
    • ±(0.1 + 2.0%) of attenuation state up to 18 GHz
    • ±(0.2 + 2.5%) of attenuation state up to 26 GHz
    • ±(0.5 + 10.0%) of attenuation state up to 40 GHz
  • High RF input power handling: 26 dBm average, 30 dBm peak
  • Tight distribution in relative phase
  • Typical step error
    • ±0.15 dB to 18 GHz
    • ±0.20 dB to 26 GHz
    • ±0.60 dB to 40 GHz
  • High input linearity
    • P0.1dB insertion loss state: 30 dBm
    • P0.1dB other attenuation states: 26 dBm
    • IP3: 50 dBm typical
  • No low frequency spurious signals
  • SPI and parallel mode control, CMOS/LVTTL compatible
  • RF amplitude settling time (0.1 dB of final RF output): 230 ns
  • 2.5 mm × 2.5 mm, 16-terminal LGA package
  • Pin compatible with ADRF5721, low frequency cutoff version

Product Details

The ADRF5731 is a silicon, 4-bit digital attenuator with a 30 dB attenuation control range in 2 dB steps.

This device operates from 100 MHz to 40 GHz with better than 3.5 dB of insertion loss. The ATTIN port of the ADRF5720 has a radio frequency (RF) input power handling capability of 26 dBm average and 30 dBm peak for all states.

The ADRF5731 requires a dual supply voltage of +3.3 V and −3.3 V. The device features serial peripheral interface (SPI), parallel mode control, and complementary metal-oxide semiconductor (CMOS)-/low voltage transistor to transistor logic (LVTTL) compatible controls.

The ADRF5731 is pin compatible with the ADRF5721 low frequency cutoff version, which operates from 9 kHz to 40 GHz.

The ADRF5731 RF ports are designed to match a characteristic impedance of 50 Ω.

The ADRF5731 comes in a 16-terminal, 2.5 mm × 2.5 mm, RoHS compliant, land grid array (LGA) package and operates from −40°C to +105°C.


  • Industrial scanners
  • Test and instrumentation
  • Cellular infrastructure: 5G millimeter wave
  • Military radios, radars, electronic counter measures (ECMs)
  • Microwave radios and very small aperture terminals (VSATs)

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.

Evaluation Kits (1)

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Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
ADRF5731BCCZN Material Declaration Reliability Data 16-Lead LGA (2.5mm x 2.5mm x 0.75mm)
ADRF5731BCCZN-R7 Material Declaration Reliability Data 16-Lead LGA (2.5mm x 2.5mm x 0.75mm)
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.