Features and Benefits

  • Operating frequency from 100 MHz to 4000 MHz
  • Digitally controlled VGA with serial and parallel interfaces
  • 6-bit, 0.5 dB digital step attenuator
  • 31.5 dB gain control range with ±0.25 dB step accuracy
  • Gain block or digital step attenuator can be first
  • Single supply operation from 4.75 V to 5.25 V
  • 31.5 dB gain control range with ±0.25 dB step accuracy
  • Gain block amplifier specifications
      Gain: 19.7 dB at 2.14 GHz
      OIP3: 41.0 dBm at 2.14 GHz
      P1dB: 19.5 dBm at 2.14 GHz
      Noise figure: 2.9 dB at 2.14 GHz
  • Low quiescent current of 93 mA
  • Thermally efficient, 5 mm × 5 mm, 32-lead LFCSP
  • The companion ADL5243 integrates a ¼ W driver amplifier to the output of the gain block and DSA

Product Details

The ADL5240 is a high performance, digitally controlled variable gain amplifier (VGA) operating from 100 MHz to 4000 MHz. The VGA integrates a high performance, 20 dB gain, internally matched amplifier (AMP) with a 6-bit digital step attenuator (DSA) that has a gain control range of 31.5 dB in 0.5 dB steps with ±0.25 dB step accuracy. The attenuation of the DSA can be controlled using a serial or parallel interface.

Both the gain block and DSA are internally matched to 50 Ω at their inputs and outputs and are separately biased. The separate bias allows all or part of the ADL5240 to be used, which facilitates easy reuse throughout a design. The pinout of the ADL5240 also enables either the gain block or DSA to be first, giving the VGA maximum flexibility in a signal chain.

The ADL5240 consumes just 93 mA and operates from a single supply ranging from 4.75 V to 5.25 V. The VGA is packaged in a thermally efficient, 5 mm × 5 mm, 32-lead LFCSP and is fully specified for operation from −40°C to +85°C. A fully populated evaluation board is available.


  • Wireless infrastructure
  • Automated test equipment
  • RF/IF gain control

Product Categories

Product Lifecycle icon-not-recommended Last Time Buy

All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.

Evaluation Kits (2)

Software & Systems Requirements

Tools & Simulations


Sys-Parameter Models for Keysight Genesys

Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.


Design Tools


ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.


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.

Product Recommendations

ADL5240 Companion Parts

Recommended Low-Noise Voltage Regulators

  • For a fixed 5V, 300mA low dropout regulator with reverse current protection: ADP7102.

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.

PCN-PDN Information

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.