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18-40 GHz (K, Ka Band) Voltage-Variable Attenuator MMIC

The CMD172 is a wideband, RF / Microwave GaAs MMIC absorptive Voltage-Variable Attenuator (VVA) die which operates from 18 to 40 GHz. The VVA uses a single DC control voltage of -3V to 0V to control RF signal levels over a 37 dB dynamic range. The CMD172 attenuator MMIC has an extremely low insertion loss of 1.6 dB and is a 50 ohm matched design which eliminates the need for RF port matching. The CMD172 also offers full passivation for increased reliability and moisture protection.


  • Low insertion loss
  • Positive gain slope
  • Small die size
  • Ultra wideband performance
  • Wide attenuation range




Life Cycle

Released – for new design

Space Qualification

  • Ready for Space Screening


  • DIE
  • RoHS Compliant
Frequency (GHz)18 - 40
Insert. Loss (dB)1.6
Attn Range (dB)37
Input P1dB (dBm)15
Input IP3 (dBm)25
Return Loss (dB)12
Control Voltage (V)0 / -3
Max. Power (dBm)30

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300 Apollo Drive
Chelmsford, MA 01824
Phone: 978-467-4290
Fax: 978-467-4294

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Custom MMIC

300 Apollo Drive
Chelmsford, MA 01824
Phone: 978-467-4290
Fax: 978-467-4294

Terms and Conditions
Privacy Policy

©2006-2019 Custom MMIC
All rights reserved.

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Custom MMIC Evaluation Boards
Evaluation Boards

In addition to offering delivery from stock on our own evaluation boards for nearly all our die and packaged devices, Custom MMIC has also put nearly 30% of our devices into the X-Microwave block system. This drop-in simulation, prototyping, and production system enables efficient and expedient microwave and millimeter-wave circuit development and testing.

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Custom MMIC Space Qualified MIMCs
Space Qualification

Custom MMIC strives to design all of our MMIC devices in a manner such that they can be readily chosen for your space application. We have an extensive history of successfully screening and qualifying our product to space applications per MIL-PRF-38534, MIL-PRF-38535, NASA INST standards and customer specific requirements. We collaborate with our customers to determine the appropriate screening and qualification based on their specific mission. Our space product screening and qualification are performed in-house and with approved partners. Whether you are looking for a space screened die, hermetically sealed packaged product or non-hermetic packaged product, Custom MMIC is prepared to help you address your qualification requirements

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Design Alternative

Design alternative parts have been engineered and manufactured to replicate the form, fit and function of the original part as closely as possible. The Design Alternative also offers the benefit of being significantly lower in price than the original device making these newer products perfect for new designs. Compare datasheets and see for yourself how you can still get world class performance in a more cost-effective solution.