OP279 Rail-to-Rail High Output Current Operational Amplifier

The OP279 is a dual rail-to-rail, high output current, single supply amplifier. It is designed for low voltage applications that require either current or capacitive load drive capability. The OP279 can sink and source currents of ±80 mA (typ) and is stable with capacitive loads to 10 nF.

Applications with the benefit from the OP279's high output current include driving headphones, displays, transformers, and power transistors. The powerful output is combined with a unique input stage that maintains very low distortion with wide common-mode range, even in single supply designs.

The OP279 can be used as a buffer to provide much greater drive capability than can usually be provided by CMOS outputs. CMOS ASICs and DACs often have outputs that can swing to both the positive supply and ground, but are incapable of driving greater than a few milliamps.

Bandwith is typically 5 MHz and the slew rate is 3 V/µs, making these amplifiers well suited for single supply applications that require audio bandwidths when used in high gain configurations. Operation is guaranteed from voltages as low as 4.5 V, up to 12 V.

When using the OP279 in +5 volt systems, very good audio performance can be attained. THD is below 0.01% with a 600 Ohm load, and noise is a respectable 21 nV/Hz. Supply current is less than 3.5 mA per amplifier.

The OP279 is available in 8-pin plastic DIP and SO-8 surface mount packages. They are specified over the industrial (-40°C to +80°C) temperature range.

Features and Benefits
  • Rail-to-Rail Inputs and Outputs
  • High Output Current: ±60 mA
  • Single Supply: 5 V to 12 V
  • Wide Bandwidth: 5 MHz
  • High Slew Rate: 3 V/±s
  • Low Distortion: 0.01%
  • Unity-Gain Stable
  • No Phase Reversal
  • Short-Circuit Protected
  • Drives Capacitive Loads: 10 nF
  • Amplifiers
    OP279 SPICE Macro-Model
    Data Sheets
    Documentnote
    OP179/OP279: Rail-to-Rail High Output Current Operational Amplifiers Data Sheet (Rev. G)PDF 254 kB
    Application Notes
    Documentnote
    AN-358: Noise and Operational Amplifier CircuitsPDF 593 kB
    AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0)PDF 5.3 M
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    OP279GRUZ-REEL Production8 ld TSSOPREEL 2500-40 to 85C01.47Y
    OP279GSZ Production8 ld SOICOTH 98-40 to 85C1.621.47Y
    OP279GSZ-REEL Production8 ld SOICREEL 2500-40 to 85C01.47Y
    OP279GSZ-REEL7 Production8 ld SOICREEL 1000-40 to 85C01.47Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-PRAOPAMP-2CPZDual CP-8 lead LFCSP Evaluation Board20.19Y
    EVAL-PRAOPAMP-2RMZDual RM-8 lead MSOP Evaluation Board20.19Y
    EVAL-PRAOPAMP-2RZDual R-8 lead SOIC Evaluation Board20.19Y
    OP179/OP279: Rail-to-Rail High Output Current Operational Amplifiers Data Sheet (Rev. G) op279
    OP279 SPICE Macro-Model Rev. A, 7/94 op279
    OP279G SPICE Macro-Model Rev. A, 7/94 op279
    AN-358: Noise and Operational Amplifier Circuits ad8072
    AN-358: 噪声与运算放大器电路 (Rev. 0) ad8072
    AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0) ad8350