Analog Devices Inc. HMC939A Digital Attenuators

Analog Devices HMC939A is designed as a 5-bit broadband GaAs IC digital attenuator MMIC chip. Operating from 0.1 to 40GHz, the HMC939A has a typical insertion loss of less than 5dB. The device features attenuator bit values of 1.0 (LSB), 2, 4, 8, 16 for a total attenuation of 31dB. HMC939A achieves excellent attenuation accuracy at less than ±1.0dB typical step error and an IIP3 of +43dBm. HMC939A’s five control voltage inputs, which can toggle between +5V and 0V, are select for each attenuation state.


  • 1.0dB LSB steps to 31dB
  • Single positive control line per bit
  • ±1.0dB typical bit error
  • High input IP3: +43dBm
  • Die size: 2.34mm x 1.0mm x 0.1mm


  • Fiber Optics & Broadband Telecom
  • Microwave Radio & VSAT
  • Military Radios, Radar & ECM
  • Space Applications
  • Sensors
  • Test & Measurement Equipment

Functional Block Diagram

Analog Devices Inc. HMC939A Digital Attenuators
Publicado: 2016-10-28 | Atualizado: 2022-03-11