Add to Signal Chain Designer

ADL5243:  100 MHz TO 4000 MHz RF/IF Digitally Controlled VGA

Product Details

Product Status:Recommended for New Designs

The ADL5243 is a high performance, digitally controlled variable gain amplifier operating from 100 MHz to 4000 MHz.

The VGA integrates two high performance amplifiers and a digital step attenuator (DSA). Amplifier 1 (AMP1) is an internally matched gain block amplifier with 20 dB gain, and Amplifier 2 (AMP2) is a broadband ¼ W driver amplifier that requires very few external tuning components. The DSA is 6-bit with a 31.5 dB gain control range, 0.5 dB steps, and ±0.25 dB step accuracy. The attenuation of the DSA can be controlled using a serial or parallel interface.

The gain block and DSA are internally matched to 50 Ω at their inputs and outputs, and all three internal devices are separately biased. The separate bias allows all or part of the ADL5243 to be used, which allows for easy reuse throughout a design. The pinout of the ADL5243 also enables the gain block, DSA, or ¼ W driver amplifier to be first, giving the VGA maximum flexibility in a signal chain.

The ADL5243 consumes 175 mA and operates off 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


  • 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, DSA, or ¼ W driver amplifier can be first
  • The companion ADL5240 integrates a gain block with DSA
  • Gain Block Amplifier 1
       Gain: 19.2 dB at 2140 MHz
       OIP3: 40.2 dBm at 2140 MHz
       P1dB: 19.8 dBm at 2140 MHz
       Noise figure: 2.9 dB at
           2140 MHz
  • ¼ W Driver Amplifier 2
       Gain: 14.2 dB at 2140 MHz
       OIP3: 41.1 dBm at 2140 MHz
       P1dB: 26.0 dBm at 2140 MHz
       Noise figure: 3.7 dB at
           2140 MHz
  • Low quiescent current of 175 mA

Functional Block Diagram for ADL5243


Title Content Type File Type
ADL5243: 100 MHz to 4000 MHz RF/IF Digitally Controlled VGA Data Sheet (Rev B, 09/2012) (pdf, 750 kB) Data Sheets PDF
Analog Devices Introduces High-Performance RF ICs for Multi-band Base Stations and Microwave Point-to-Point Radios (03 Jun 2014) Press Releases HTML
RF Source Booklet  (PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADI’s ADIsimRF design tool provides calculations for the most important parameters within the RF signal chain, including cascaded gain, noise figure, IP3, P1dB, and total power consumption.
ADIsim Design/Simulation Tools HTML
ADIsimPLL™- Version 3.60.10
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.
ADIsim Design/Simulation Tools HTML
ADL5243 S-Parameters  (zip, 178 kB) S-Parameters ZIP

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

Price Table Help

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.

ADL5243 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
ADL5243-EVALZ Status: Production Evaluation Board $100.19 Yes -

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.

Check Inventory & Purchase

View Sales and Distribution Offices

content here.
content here.

Review this Product