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AD8274:  Very Low Distortion, Precision Difference Amplifier

Product Details

Product Status:Recommended for New Designs

The AD8274 is a difference amplifier that delivers excellent ac and dc performance. Built on Analog Devices, Inc., proprietary iPolar® process and laser-trimmed resistors, AD8274 achieves a breakthrough in distortion vs. current consumption and has excellent gain drift, gain accuracy, and CMRR.

Distortion in the audio band is an extremely low 0.00025% (112 dB) at a gain of ½ and 0.00035% (109 dB) at a gain of 2 while driving a 600 Ω load

With supply voltages up to ±18 V (+36 V single supply), the AD8274 is well suited for measuring large industrial signals. Additionally, the part’s resistor divider architecture allows it to measure voltages beyond the supplies.

With no external components, the AD8274 can be configured as a G = ½ or G = 2 difference amplifier. For single-ended applications that need high gain stability or low distortion performance, the AD8274 can also be configured for several gains ranging from −2 to +3.

The excellent distortion and dc performance of the AD8274, along with its high slew rate and bandwidth, make it an excellent ADC driver. Because of the part’s high output drive, it also makes a very good cable driver.

The AD8274 only requires 2.6 mA maximum supply current. It is specified over the industrial temperature range of −40°C to +85°C and is fully RoHS compliant. For the dual version, see the AD8273 data sheet.

Applications

  • ADC driver
  • High performance audio
  • Instrumentation amplifier building blocks
  • Level translators
  • Automatic test equipment
  • Sine/cosine encoders

FEATURES and BENEFITS

  • Very low distortion
    0.00025% THD + N ( 20 kHz)
    0.0015% THD + N (100 kHz)
    Drives 600 Ω loads
  • Excellent gain accuracy
    0.03% maximum gain error
    2 ppm/°C maximum gain drift
    Gains of ½ or 2
  • AC specifications
    20 V/µs minimum slew rate
    800 ns to 0.01% settling time
  • High accuracy dc performance
    83 dB minimum CMRR
    700 µV maximum offset voltage
  • 8-lead SOIC and MSOP packages
  • Supply current: 2.6 mA maximum
  • Supply range: ±2.5 V to ±18 V

AD8274 Functional Block Diagram

Documentation

Title Content Type File Type
AD8274: Very Low Distortion, Precision Difference Amplifier Data Sheet (Rev C, 08/2011) (pdf, 415 kB) Data Sheets PDF
CN-0122: High Speed Instrumentation Amplifier Using the AD8271 Difference Amplifier and the ADA4627-1 JFET Input Op Amp  (pdf, 159 kB) Circuit Note PDF
CN-0116: High Voltage, High Precision Current Sensing with Output Level Shifting Using the AD8210 Current Sense Amplifier and the AD8274 Difference Amplifier  (pdf, 208 kB) Circuit Note PDF
A Designer's Guide to Instrumentation Amplifiers (3rd Edition) Design Handbooks HTML
High-performance Adder Uses Instrumentation Amplifiers
Make an adder circuit using instrumentation amplifiers to increase input impedance.
(EDN, 9/3/2009)
Technical Articles HTML
Industrial ICs
Industrial ICs Solutions Bulletin, Volume 10, Issue 8
Solutions Bulletins HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8274 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

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.

Product Recommendations & Reference Designs

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Price, packaging, availability

AD8274 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8274ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.25 $1.05 Y  Material Info PCN Purchase Sample
AD8274ARMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $1.05 Y  Material Info PCN Purchase
AD8274ARMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $1.05 Y  Material Info PCN Purchase
AD8274ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.25 $1.05 Y  Material Info Notify Me Purchase Sample
AD8274ARZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.05 Y  Material Info Notify Me Purchase
AD8274ARZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 $1.25 $1.05 Y  Material Info Notify Me 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.


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