Analog Devices Inc. HMC1119 Digital Step Attenuators

Analog Devices HMC1119 Digital Step Attenuators are broadband, 7-bit attenuators covering 0.1-6.0GHz with a 31.5dB attenuation control range in 0.25dB steps.

High Accuracy and Low Insertion Loss
The HMC1119 attenuators are optimized for excellent step accuracy and high linearity over frequency and temperature range. The devices maintain excellent attenuation accuracy of ±0.2dB with a ±0.1dB typical step error. The HMC1119 family has a 1.1dB at 1GHz and a 1.3dB at 2GHz rating.

Advanced Silicon Design
Designed using an advanced silicon process, the HMC1119 attenuators offer low power consumption, fast settling time, and high ESD robustness. An on-chip regulator supports a wide, 3.3-5.0V single-supply operating range with no performance degradation in electrical characteristics. The device's ~100nsec switching and 0.05dB in ~250nsec settling times make the HMC1119 attenuators ideal for fast-switching applications and time division multiplexed systems. The robust 2kV ESD protection on signal inputs and outputs complies with the most stringent RF applications and assembly requirements.

Serial and Parallel Programming Interface
The HMC1119 driver supports serial (3-wire) and parallel controls of the attenuator.

Safe-state Transitions
HMC1119's safe-state transitions feature ensures the safe operation of the components in the RF signal chain.

​Internally Matched
HMC1119's bidirectional, interchangeable RF inputs and outputs are internally matched to 50Ω. The RF inputs and outputs do not require any external matching components.


  • Attenuation range 0.25dB LSB steps to 31.75dB
  • Low insertion loss
    • 1.1dB at 1.0GHz
    • 1.3dB at 2.0GHz
  • Typical step error less than ±0.1dB
  • Excellent attenuation accuracy less than ±0.2dB
  • Low phase shift error 6° phase shift at 1.0GHz
  • Safe state transitions
  • High linearity
    • 1dB compression (P1dB) 31dBm typical
    • Input third-order intercept (IP3) 54dBm typical
  • RF settling time (0.05dB final RF output) 250ns
  • Single supply operation 3.3V to 5.0V
  • ESD rating Class 2 (2kV human body model (HBM))
  • 24-lead, 4mm× 4mm LFCSP package 16mm²


  • Cellular infrastructure
  • Microwave radios and very small aperture terminals (VSATs)
  • Test equipment and sensors
  • IF and RF designs


Analog Devices Inc. HMC1119 Digital Step Attenuators

Evaluation Board

EVAL-HMC1119 Evaluation Board
Analog Devices EVAL-HMC1119 is a fully populated evaluation board that helps designers become familiar with the features of the HMC1119 Digital Step Attenuators.
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Published: 2016-04-18 | Updated: 2022-03-11