AD8277 Low Power, Wide Supply Range, Low Cost Unity-Gain Difference Amplifiers

The common-mode range of the amplifiers extends to almost double the supply voltage, making these amplifiers 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 amps. The AD8276/AD8277 are unity-gain stable. While they are optimized for use as difference amplifiers, they can also be connected in high precision, single-ended configurations with G = −1, +1, +2. The AD8276/AD8277 provide an integrated precision solution that has smaller size, lower cost, and better performance than a discrete alternative. The AD8276/AD8277 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 per channel, which is ideal for battery-operated and portable systems. The AD8276 is available in the space-saving 8-lead MSOP and SOIC packages, and the AD8277 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 Differential output instrumentation amplifier Portable, battery-powered equipment Test and measurement

The AD8276/AD8277 are general-purpose, unity-gain difference amplifiers intended for precision signal conditioning in power critical applications that require both high performance and low power. They provide exceptional common-mode rejection ratio (86 dB) and high bandwidth while amplifying signals 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 amplifiers extends to almost double the supply voltage, making these amplifiers 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 amps.

The AD8276/AD8277 are unity-gain stable. While they are optimized for use as difference amplifiers, they can also be connected in high precision, single-ended configurations with G = −1, +1, +2. The AD8276/AD8277 provide an integrated precision solution that has smaller size, lower cost, and better performance than a discrete alternative.

The AD8276/AD8277 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 per channel, which is ideal for battery-operated and portable systems.

The AD8276 is available in the space-saving 8-lead MSOP and SOIC packages, and the AD8277 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
  • Differential output instrumentation amplifier
  • 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 channel
  • Low power dissipation: 0.5 mW at VS = 2.5 V
  • Bandwidth: 550 kHz
  • CMRR: 86 dB minimum, dc to 10 kHz
  • Low offset voltage drift: ±2 μV/°C maximum (B Grade)
  • Please see data sheet for additional features.
  • Amplifiers
    SPICE Models
    Data Sheets
    Documentnote
    AD8276/AD8277: Low Power, Wide Supply Range, Low Cost Unity-Gain Difference Amplifiers Data Sheet (Rev. C)PDF 535 kB
    User Guides
    Documentnote
    UG-744: Evaluating the AD8273/AD8277/AD8279PDF 1.01 M
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD8277ARZ Production14 ld SOICOTH 56-40 to 85C1.921.6Y
    AD8277ARZ-R7 Production14 ld SOICREEL 1000-40 to 85C01.6Y
    AD8277ARZ-RL Production14 ld SOICREEL 2500-40 to 85C01.6Y
    AD8277BRZ Production14 ld SOICOTH 56-40 to 85C2.822.35Y
    AD8277BRZ-R7 Production14 ld SOICREEL 1000-40 to 85C02.35Y
    AD8277BRZ-RL Production14 ld SOICREEL 2500-40 to 85C02.35Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    AD8273-EVALZEvaluation Board for 14-Lead SOIC125Y
    AD8277-EVALZEvaluation Board for 14-Lead SOIC125Y
    AD8279-EVALZEvaluation Board for 14-Lead SOIC125Y
    Reference Materials
    AD8276/AD8277: Low Power, Wide Supply Range, Low Cost Unity-Gain Difference Amplifiers Data Sheet (Rev. C) ad8276
    AD8276/AD8277:低功耗、宽电源电压范围、低成本、单位增益差动放大器 (Rev. B) ad8276
    AD8277 SPICE Macro Model ad8277
    UG-744: Evaluating the AD8273/AD8277/AD8279 ad8273
    CN-0099: High Precision, Low Cost Current Sources Using the AD8276... ad8276