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AD8351:  Low Distortion Differential RF/IF Amplifier

Product Details

The AD8351 is fully differential amplifier, designed to drive high resolution (10-14 bits) / high speed ADCs (240 MSPS) at IF frequencies within communications receivers.

The AD8351 simplifies ADC driving allowing the user to adjust the gain (up to 26 dB) through one external resistor and incorporates output common mode adjustment circuit to ease the drive levels into the ADC.

The AD8351 is a very low distortion gain stage, along with low noise and wide gain bandwidth, making the part ideally suited to be used in digital communications IF receivers. The part has been fully specified for operation at a number of common IF frequencies 70/140/240 MHz.

The AD8351 product data sheet provides detailed circuits on the driving 12-/14-bit resolution ADCs and using the device for single ended to differential signal conversion.

The AD8351 is fabricated on an advanced silicon bipolar process, operating on a single 3 or 5 volt supply, packaged in space saving 10-lead micro SOIC package and fully specified over the –40ºC to +85ºC temperature range.


Other RF / IF amplifiers products:

AD8367 - 500 MHz Single Ended, Analog Controlled VGA
AD8369 - 600 MHz, 45 dB Digitally Controlled Variable Gain Amplifier
AD8350 - 1.0 GHz Differential Amplifier


  • –3 dB bandwidth of 2.2 GHz for AV = 12 dB
  • Single resistor programmable gain
      0 dB ≤ AV ≤ 26 dB
  • Differential interface
  • Low noise input stage 2.7 nV/√Hz at AV = 10 dB
  • Low harmonic distortion
      –79 dBc second at 70 MHz
      –81 dBc third at 70 MHz
  • OIP3 of 31 dBm at 70 MHz
  • Single-supply operation: 3 V to 5.5 V
  • Low power dissipation: 28 mA at 5 V
  • Adjustable output common-mode voltage
  • Fast settling and overdrive recovery
  • Slew rate of 13,000 V/μs
  • Power-down capability

Functional Block Diagram for AD8351


Title Content Type File Type
AD8351: Low Distortion Differential RF/IF Amplifier Data Sheet (Rev D, 01/2015) (pdf, 465 kB) Data Sheets PDF
AN-1026: High Speed Differential ADC Driver Design Considerations  (pdf, 355 kB) Application Notes PDF
AN-827: A Resonant Approach to Interfacing Amplifiers to Switched-Capacitor ADCs  (pdf, 203 kB) Application Notes PDF
AN-649: Using the Analog Devices Active Filter Design Tool  (pdf, 5301 kB) Application Notes PDF
Buffer Adapts Single-ended Signals for Differential Inputs
by Randall Carver, Analog Devices (EDN Design Idea, 9/2/2004)
Technical Articles HTML
Ask The Application Engineer 36, Wideband A/D Converter Front-End Design Considerations II: Amplifier-or Transformer Drive for the ADC?
(Analog Dialogue, Volume 41 February 2007)
Analog Dialogue HTML
Differential amp matches A/D performance
(EE Times, September 9, 2002)
Product Reviews HTML
ADI's differential amplifier aims at alleviating 3G bottlenecks
(EBN, September 5, 2002)
Product Reviews HTML
RF Source Booklet  (PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
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

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

AD8351 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD8351ACPZ-R7 Status: Production 16 ld LFCSP 3x3x.55(1.70 EP) 16 Ind Reel, 1500 - $2.68 Y  Material Info PCN Purchase Sample
AD8351ARM Status: Production 10 ld MSOP 10 Ind Tube, 50 $3.85 $3.11 N  Material Info PCN Purchase
AD8351ARM-REEL7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $3.11 N  Material Info PCN Purchase
AD8351ARMZ Status: Production 10 ld MSOP 10 Ind Tube, 50 $3.34 $2.68 Y  Material Info PCN Purchase Sample
AD8351ARMZ-REEL7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $2.68 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.

AD8351 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
AD8351-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.

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