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  5. ADAR4002


Features and Benefits

  • 0.5 GHz to 19 GHz frequency range
  • Programmable Time Delay: 7-bit resolution
  • Programmable Time Delay Range
    • Time Delay Range 0: 0 to 508ps range, 4ps Standard resolution
    • Time Delay Range 1: 0 to 254ps range, 2ps High resolution
  • Programmable Attenuation: 6-bit resolution
    • 31.5 dB adjustment range
    • 0.5 dB step size
  • Fully programmable via a 3-wire or 4-wire SPI interface
  • SPI Programmable and Daisy Chaining selectable
  • Power Dissipation: 1 mW with 1.2V and 1.0V Dual Supplies
  • 14-pin 2x3mm LFCSP

Product Details

The ADAR4002 is a very low power broadband bi-directional single channel true time delay unit (TDU) and a digital step attenuator (DSA). The IC has 18.5 GHz of bandwidth over a frequency range of 0.5 GHz to 19 GHz with 50 Ω input impedance at both RF ports. The TDU has two programmable maximum time delays, each with 7-bit control: Range 0 has a maximum delay of 508ps with a resolution of 4ps. This range is used at lower frequencies and where the ADAR4002 has less loss. Range 1 has a maximum delay of 254ps and a resolution of 2ps. This range has less loss compared to Range 0 and is useful at higher frequencies. The DSA has 6-bit resolution with an attenuation range of 0 dB to 31.5 dB and a step size of 0.5 dB. The ADAR4002 is designed to provide flexible digital control through either a SPI interface or a shift register to allow daisy chaining multiple chips together. The ADAR4002 contains register memory for 32 TDU+DSA states. The memory combined with on-chip sequencers, allows a fast memory advance via the UPDATE pin.

The ADAR4002 is available in a 2 mm × 3 mm 14-lead LFCSP package and is specified from -40°C to 85°C.


  • Electronic steerable antenna arrays
  • Multi-Function Arrays
  • Data Links
  • Test Equipment
  • Keysight SystemVue model is available. Please contact ADI at beamformer@analog.com.

    PathWave System DesignThe ADAR4002 Keysight SystemVue model is based on measured small signal data across frequency, capturing all the permutations of the time delay and attenuation settings.

    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.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
    ADAR4002ACPZ Material Declaration Reliability Data 14-Lead LFCSP (2mm x 3mm x 0.75mm w/EP)
    ADAR4002ACPZ-R7 Material Declaration Reliability Data 14-Lead LFCSP (2mm x 3mm x 0.75mm w/EP)
    Wafer Fabrication Data

    Sample & Buy

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