Features and Benefits

  • 1.0 dB LSB Steps to 31 dB
  • Single Positive Control Line Per Bit
  • Insertion loss: 6.4 dB typical at 40 GHz
  • Excellent Attenuation accuracy
  • ±1.0 dB Typical Bit Error
  • High Input IP3: +43 dBm
  • Power handling: +25 dBm
  • Dual-supply operation: ±5 V

Product Details

The ADH939S is a broadband 5-bit GaAs IC digital attenuator supplied in die form with Class K element evaluation. Covering 0.1 to 40.0 GHz, the insertion loss is less than 6.4 dB typical @ 40.0 GHz. The attenuator bit values are 1.0 (LSB), 2, 4, 8, 16 for a total attenuation of 31 dB. Attenuation accuracy is excellent at less than ±1.0 dB typical step error with an IIP3 of +43 dBm.

The ADH939S requires dual supply voltages, Vdd = +5 V and Vss = -5V, and five control voltage inputs, toggled between +5V and 0V to select each attenuation state.


  • Military & Space
  • Transceivers
  • Test Equipment & Sensors

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.

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.

Sample & Buy

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