1. Products
  2. RF and Microwave
  3. Attenuators
  4. Digital Step Attenuators
  5. HMC424A-DIE


Features and Benefits

  • Attenuation range: 0.5 dB (LSB) steps to 31.5 dB
    • ±0.5 dB typical step error
  • Low insertion loss: 2.8 dB typical at 4.0 GHz
  • High linearity at VEE = −5 V
    • Input P0.1dB: 25 dBm typical
    • Input IP3: 45 dBm typical
  • High RF input power handling: 25 dBm maximum
  • Low relative phase: 30° at 6.0 GHz
  • Single-supply operation: −3 V to −5 V
  • Die size: 1.390 mm × 0.770 mm × 0.102 mm

Product Details

The HMC424ACHIPS is a broadband, 6-bit, gallium arsenide (GaAs), digital attenuator monolithic microwave integrated circuit (MMIC) chip with a 31.5 dB attenuation control range in 0.5 dB steps.

The HMC424ACHIPS offers excellent attenuation accuracy of ±(0.2 dB + 3% of attenuation state) and high input linearity over the specified frequency range from 0.1 GHz to 13.0 GHz with a typical insertion loss of ≤4.2 dB. The attenuator bit values are 0.5 dB (LSB), 1 dB, 2 dB, 4 dB, 8 dB, and 16 dB for a total attenuation of 31.5 dB with a ±0.5 dB of typical step error.

The device allows a userto program the attenuation state via six parallel control inputs toggled between 0 V and VEE.

The HMC424ACHIPS operates with a single negative supply voltage from −3 V to −5 V, and requires an external driver to interface with a CMOS/transistor to transistor logic (TTL) interface.

The HMC424ACHIPS comes in a RoHS compliant, 9-pad bare die.


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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations


Design Tool


ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

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
HMC424A Material Declaration Reliability Data CHIPS OR DIE
HMC424A-GP Material Declaration Reliability Data CHIPS OR DIE
HMC424A-SX Material Declaration Reliability Data CHIPS OR DIE
Wafer Fabrication Data

Sample & Buy

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