3 GHz Variable Gain LNA with Integrated ½ W Driver Amplifier

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Product Details

The ADL5246 is a high performance, low noise variable gain amplifier (VGA) optimized for multistandard base station receivers and point to point receive (Rx) and transmit (Tx) applications. The low noise figure and excellent linearity performance allow the device to be used in a variety of applications.

The device consists of a low noise amplifier, a high linearity VGA, and a ½ W output driver stage. The variable attenuator networks are optimized to provide high linearity performance over the 45 dB gain control range. Gain is set using a unipolar control voltage from 0 V to 3.3 V. The output stage of the ADL5246 is an externally tuned ½ W driver amplifier, which allows the device to be optimized anywhere between the 0.6 GHz to 3 GHz range, with an average tuning bandwidth of 200 MHz wide. An external filter can be used between the VGA and the final driver amplifier. The ADL5246 can be biased between 3.3 V and 5 V to tradeoff between performance and power consumption.

The ADL5246 is fabricated on an advanced GaAs process. The device is available in a 32-lead, RoHS-compliant, 5 mm × 5 mm LFCSP and thermally rated to operate over the −40°C to +105°C temperature range.


  • Multistandard radio receivers
  • Point to point Rx and Tx
  • Instrumentation
  • Military and aerospace

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.

Evaluation Kits


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EVAL-ADL5246 Circuit Diagram

Product Details

ADL5246-EVALZ is a fully populated, 4-layer, FR408-based evaluation board. For operation, it requires a 5 V/500 mA power supply and two 3 V/100 mA power supplies. The variable gain amplifier (AMP2) is analog controlled and the 0 V to 3.3 V gain control pins maybe operated independently or in tandem. The internal bypass switch operates with a 3.3 V complementary logic. The LNA (AMP1), VGA (AMP2), and DRIVER (AMP3) can be individually biased using the test loops labeled VCC1, VPOS1, VPOS2, VCC3 and GND. VCC1 provides bias to the LNA (AMP1). VPOS1 and VPOS2 provide the bias for the VGA (AMP2). VPOS1 provides bias for the VGA amp circuit and VPOS2 provides bias to the internal VVAs and to the bias circuit of the DRIVER (AMP3). VPOS2 and VCC3 must be connected when operating the DRIVER. VPOS1 and VPOS2 are connected to an internal power plane via R6 and R7. Removing R6 and R7 allows VPOS1 and VPOS2 to be powered separately. A fully cascaded signal chain, an LNA driving the VGA, followed by the DRIVER, can be configured using the available resistor and capacitor pads.

Tools & Simulations

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Reference Materials

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Design Resources

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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.

ADL5246 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints



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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Evaluation Boards Pricing displayed is based on 1-piece.
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.