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AD8270:  Precision Dual-Channel, Difference Amplifier

Product Details

Product Status:Recommended for New Designs

The AD8270 is a low distortion, dual-channel amplifier with internal gain setting resistors. With no external components, it can be configured as a high performance difference amplifier with gains of 0.5, 1, or 2. It can also be configured in over 40 single-ended configurations, with gains ranging from −2 to +3.

The AD8270 is the first dual-difference amplifier in the small 4 mm × 4 mm LFCSP. It requires the same board area as a typical single-difference amplifier. The smaller package allows a 2× increase in channel density and a lower cost per channel, all with no compromise in performance.

The AD8270 operates on both single and dual supplies and requires only 2.5 mA maximum supply current for each amplifier. It is specified over the industrial temperature range of −40°C to +85°C and is fully RoHS compliant.

Applications

  • Instrumentation amplifier building blocks
  • Level translators
  • Automatic test equipment
  • High performance audio
  • Sine/Cosine encoders
  • Data Sheet, Rev. 0, 1/08

    FEATURES and BENEFITS

    • With no external resistors
      Difference amplifier: gains of 0.5, 1, or 2
      Single ended amplifiers: over 40 different gains
      Set reference voltage at midsupply
    • Excellent ac specifications
      15 MHz bandwidth
      30 V/μs slew rate
    • High accuracy dc performance
      0.08% maximum gain error
      10 ppm/°C maximum gain drift
      80 dB minimum CMRR (G = 2)
    • Two channels in small 4 mm × 4 mm LFCSP
    • Supply current: 2.5 mA per channel
    • Supply range: ±2.5 V to ±18 V

    Functional Block Diagram for AD8270

    Documentation

    Title Content Type File Type
    AD8270: Precision, Dual-Channel Difference Amplifier Data Sheet (Rev 0, 02/2008) (pdf, 593 kB) Data Sheets 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
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    AD8270 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.

    SampleSample & Buy

    Price, packaging, availability

    AD8270 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD8270ACPZ-R7 Status: Production 16 ld LFCSP (4x4mm, 2.35mm exposed pad) 16 Ind Reel, 1500 $2.28 $1.91 Y  Material Info PCN Purchase Sample
    AD8270ACPZ-RL Status: Production 16 ld LFCSP (4x4mm, 2.35mm exposed pad) 16 Ind Reel, 5000 $2.28 $1.91 Y  Material Info PCN Purchase
    AD8270ACPZ-WP Status: Production 16 ld LFCSP (4x4mm, 2.35mm exposed pad) 16 Ind Tray, 64 $2.28 $1.91 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.


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