Add to Signal Chain Designer

AD8278:  Low Power, Wide Supply Range, Low Cost Difference Amplifiers, G = ½, 2

Product Details

Product Status:Recommended for New Designs

The AD8278 and AD8279 are general-purpose difference amplifiers intended for precision signal conditioning in power critical applications that require both high performance and low power. The AD8278 and AD8279 provide exceptional common-mode rejection ratio (80 dB) and high bandwidth while amplifying input signals that are well beyond the supply rails. The on-chip resistors are laser trimmed for excellent gain accuracy and high CMRR. They also have extremely low gain drift vs. temperature.

The common-mode range of the amplifier extends to almost triple the supply voltage (for G = ½), making the amplifer ideal for single-supply applications that require a high common-mode voltage range. The internal resistors and ESD circuitry at the inputs also provide overvoltage protection to the op amp.

The AD8278 and AD8279 can be used as difference amplifiers with G = ½ or G = 2. They can also be connected in a high precision, single-ended configuration for non inverting and inverting gains of −½, −2, +3, +2, +1½, +1, or +½. The AD8278 and AD8279 provide an integrated precision solution that has a smaller size, lower cost, and better performance than a discrete alternative.

The AD8278 and AD8279 operate on single supplies (2.0 V to 36 V) or dual supplies (±2 V to ±18 V). The maximum quiescent supply current is 200 μA, which is ideal for battery-operated and portable systems. For unity-gain difference amplifiers with similar performance, refer to the AD8276 and AD8277 data sheets.

The AD8278 is available in the space-saving 8-lead MSOP and SOIC packages, and the AD8279 is offered in a 14-lead SOIC package. Both are specified for performance over the industrial temperature range of −40°C to +85°C and are fully RoHS compliant.


Applications
  • Voltage measurement and monitoring
  • Current measurement and monitoring
  • Instrumentation amplifier building block
  • Portable, battery-powered equipment
  • Test and measurement
  • FEATURES and BENEFITS

    • Wide input range beyond supplies
    • Rugged input overvoltage protection
    • Low supply current: 200 μA maximum (per amplifier)
    • Low power dissipation:
      0.5 mW at VS = 2.5 V
    • Bandwidth: 1 MHz (G = ½)
    • CMRR: 80 dB minimum,
      dc to 20 kHz (G = ½, B Grade)
    • Low offset voltage drift: ±1 μV/°C maximum (B Grade)
    • Low gain drift: 1 ppm/°C maximum (B Grade)
    • Enhanced slew rate: 1.4 V/μs
    • Wide power supply range
      Single supply: 2 V to 36 V
      Dual supplies: ±2 V to ±18 V
    • 8-lead SOIC, 14-lead SOIC, and MSOP packages

    Functional Block Diagram for AD8278

    Documentation

    Title Content Type File Type
    AD8278/AD8279: Low Power, Wide Supply Range, Low Cost Difference Amplifiers, G = ½, 2 Data Sheet (Rev C, 01/2011) (pdf, 656 kB) Data Sheets PDF
    MS-2178: Discussion Between CareFusion and Analog Devices: Optimizing Performance and Lowering Power in an EEG Amplifer  (pdf, 147 kB) Technical Articles PDF
    Industrial ICs
    Industrial ICs Solutions Bulletin, Volume 10, Issue 8
    Solutions Bulletins HTML
    Low Power Amplifiers Overview HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    AD8278 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

    AD8278 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD8278ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.14 $0.95 Y  Material Info PCN Purchase Sample
    AD8278ARMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $0.95 Y  Material Info PCN Purchase
    AD8278ARMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $0.95 Y  Material Info PCN Purchase
    AD8278ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.18 $0.98 Y  Material Info PCN Purchase Sample
    AD8278ARZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $0.98 Y  Material Info PCN Purchase
    AD8278ARZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $0.98 Y  Material Info PCN Purchase
    AD8278BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.74 $1.45 Y  Material Info PCN Purchase Sample
    AD8278BRMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $1.45 Y  Material Info PCN Purchase
    AD8278BRMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $1.45 Y  Material Info PCN Purchase
    AD8278BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.74 $1.45 Y  Material Info PCN Purchase Sample
    AD8278BRZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.45 Y  Material Info PCN Purchase
    AD8278BRZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.45 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.


    沪ICP备09046653号
    content here.
    content here.

    Review this Product

    Close