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AD8375:  Ultralow Distortion IF VGA

Product Details

The AD8375 is a digitally controlled, variable gain, wide bandwidth amplifier that provides precise gain control, high IP3, and low noise figure. The excellent distortion performance and high signal bandwidth make the AD8375 an excellent gain control device for a variety of receiver applications. Using an advanced high speed SiGe process and incorporating proprietary distortion cancellation techniques, the AD8375 achieves 50 dBm output IP3 at 200 MHz.

The AD8375 provides a broad 24 dB gain range with 1 dB resolution. The gain is adjusted through a 5-pin control interface and can be driven using standard TTL levels. The open-collector outputs provide a flexible interface, allowing the overall signal gain to be set by the loading impedance. Thus, the signal voltage gain is directly proportional to the load.

The AD8375 is powered on by applying the appropriate logic level to the PWUP pin. The quiescent current of the AD8375 is typically 130 mA. When powered down, the AD8375 consumes less than 5 mA and offers excellent input-to-output isolation.

Fabricated on an Analog Devices, Inc., high speed SiGe process, the AD8375 is supplied in a compact, thermally enhanced, 4 mm × 4 mm, 24-lead LFCSP package and operates over the temperature range of −40°C to +85°C.


  • Differential ADC drivers
  • High IF sampling receivers
  • Wideband multichannel receivers
  • Instrumentation
  • Data Sheet, Rev. 0, 8/07


    • Bandwidth of 630 MHz (−3 dB)
    • Gain range: −4 dB to +20 dB
    • Step size: 1 dB ± 0.2 dB
    • Differential input and output
    • Noise figure: 8 dB @ maximum gain
    • Output IP3 of ~50 dBm at 200 MHz
    • Output P1dB of 19 dBm at 200 MHz
    • Provides constant SFDR vs. gain
    • Parallel 5-bit control interface
    • Power-down feature
    • Single 5 V supply operation
    • 24-lead, 4 mm × 4 mm LFCSP

    Functional Block Diagram for AD8375


    Title Content Type File Type
    AD8375: Ultralow Distortion IF VGA Data Sheet (Rev A, 10/2012) (pdf, 785 kB) Data Sheets PDF
    AN-1098: Methodology for Narrow-Band Interface Design Between High Performance Differential Driver Amplifiers and ADCs  (pdf, 167 kB) Application Notes PDF
    The Differential-signal Advantage for Communications System Design
    Understand how differential signal chains and architectures can improve system performance in challenging applications.
    (RF Designline, 2/1/2010)
    Technical Articles HTML
    RF Source Booklet  (PDF, 4353 kB)
    RF IC Product Overview - Version P (02/2014)
    Overview PDF
    Leading Inside Advertorials: Solving Dynamic Range Problems in Analog Systems  (pdf, 75 kB) Overview PDF
    RAQs index Rarely Asked Questions HTML
    What are Variable Gain Amplifiers (VGA's) and how are they used? FAQs/RAQs 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

    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

    AD8375 Model Options
    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.

    AD8375 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    AD8375-EVALZ Status: Production Evaluation Board - 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.

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