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AD8370:  750 MHz Digitally Controlled Variable Gain Amplifier

Product Details

The AD8370 is a high performance, digitally controlled variable gain amplifier, designed to be used at IF frequencies within communication infrastructure equipment.

The part provides two gain control ranges that are controlled through a three wire digital interface, and allow the user to attain fine gain control for maximum receiver sensitivity.

The AD8370 has been fully specified for operation at common wireless IF frequencies 70 / 140 / 190 / 240 / 380MHz. The high output compression and fine gain control adjustability makes the AD8370 an ideal choice for to be used within digital receiver AGC circuits for GSM / CDMA2000 / W-CDMA cellular base stations.

The AD8370 is fabricated on an advanced silicon bipolar process, operating on a single 3 or 5 volt supply, packaged in space saving 16-lead thin shrunk small outline (TSSOP) package and fully specified over the –40 to +85 C temperature range.


Samples AD8370ARU and an evaluation boards AD8370-EVAL are available.

Other Wireless VGA products:

    AD8367 - 45dB, 500MHz Single Ended, Analog Controlled VGA
    AD8369 – 45dB, 600MHz Differential, 3dB Step Digitally Controlled VGA


  • Low Frequency to 750MHz (-3dB bandwidth)
  • Output 1dB Compression Point +15.8dBm (70MHz)
  • Noise Figure 7dB
  • Single Supply 3V to 5V with Power Down
  • Fully Differential input and outputs
  • Three Wire Serial Digital Interface
  • Two Pin Selectable Gain Ranges,
    Low Range –11dB to +17dB
    High Range +6dB to +34dB
  • Output Third Order Interface
    +35dBm (70MHz)

Functional Block Diagram for AD8370


Title Content Type File Type
AD8370: LF to 750MHz Digitally Controlled VGA Data Sheet  (Rev B, 12/2011) (pdf, 819 kB) Data Sheets PDF
AN-827: A Resonant Approach to Interfacing Amplifiers to Switched-Capacitor ADCs  (pdf, 203 kB) Application Notes PDF
Design and Operation of Automatic Gain Control Loops for Receivers in Modern Communication Systems  (pdf, 129 kB) Tutorials PDF
Integrated VGA Aids Precise Gain Control  (pdf, 194 kB)
by Phillip Halford and Eamon Nash, Analog Devices, Inc. (Microwaves & RF, March 2002)
Technical Articles PDF
Variable Gain Amplifier Selection Table  (pdf, 68 kB) Product Selection Guide PDF
High-speed ADCs suit communications applications
(RF Design, 4/5/2006)
Product Reviews 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
What are Variable Gain Amplifiers (VGA's) and how are they used? FAQs/RAQs HTML
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
AD8370 Evaluation Board Software  (zip, 89 kB)
The AD8370 evaluation software requires the ADI AD4xxx USB adapter, a USB cable with USB mini-connector and a PC with USB connection. Installation on Windows 64-bit systems also requires the ADI Windows 7 drivers be installed as well.
Evaluation Software 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

AD8370 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD8370ARE-REEL7 Status: Production 16 ld TSSOP_EP (3.0mm pad size) 16 Ind Reel, 1000 - $4.91 N  Material Info PCN Purchase
AD8370AREZ Status: Production 16 ld TSSOP_EP (3.0mm pad size) 16 Ind Tube, 96 $5.04 $4.25 Y  Material Info PCN Purchase Sample
AD8370AREZ-RL7 Status: Production 16 ld TSSOP_EP (3.0mm pad size) 16 Ind Reel, 1000 - $4.25 Y  Material Info PCN Purchase
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.

AD8370 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
AD8370-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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