AD623 Single and Dual-Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier

The AD623 is an integrated, single- or dual-supply instrumentation amplifier that delivers rail-to-rail output swing using supply voltages from 3 V to 12 V. The AD623 offers superior user flexibility by allowing single gain set resistor programming and by conforming to the 8-lead industry standard pinout configuration. With no external resistor, the AD623 is configured for unity gain (G = 1), and with an external resistor, the AD623 can be programmed for gains of up to 1000.

The superior accuracy of the AD623 is the result of increasing ac common-mode rejection ratio (CMRR) coincident with increasing gain; line noise harmonics are rejected due to constant CMRR up to 200 Hz. The AD623 has a wide input common-mode range and amplifies signals with commonmode voltages as low as 150 mV below ground. The AD623 maintains superior performance with dual and single polarity power supplies.

Applications

Features and Benefits
  • Easy to use
  • Rail-to-rail output swing
  • Input voltage range extends 150 mV below ground (single supply)
  • Low power, 550 μA maximum supply current
  • Gain set with one external resistor
    • Gain range: 1 to 1000
  • Gain range: 1 to 1000
  • High accuracy dc performance
    • 0.10% gain accuracy (G = 1)
    • 0.35% gain accuracy (G > 1)
  • 0.10% gain accuracy (G = 1)
  • 0.35% gain accuracy (G > 1)
  • Noise: 35 nV/√Hz RTI noise at 1 kHz
  • Excellent dynamic specifications
  • 800 kHz bandwidth (G = 1)
  • 20 μs settling time to 0.01% (G = 10)
    • Amplifiers
    AD623 SABER Macro-Model
    Data Sheets
    Documentnote
    AD623: Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier Data Sheet (Rev. E)PDF 1.23 M
    Application Notes
    Documentnote
    AN-282: Fundamentals of Sampled Data SystemsPDF 2131 kB
    AN-244: A User's Guide to I.C. Instrumentation AmplifiersPDF 522 kB
    AN-245: Instrumentation Amplifiers Solve Unusual Design ProblemsPDF 543 kB
    AN-671: Reducing RFI Rectification Errors in In-Amp CircuitsPDF 208 kB
    AN-589: Ways to Optimize the Performance of a Difference Amplifier (Rev. B)PDF 115 kB
    User Guides
    Documentnote
    UG-261: Evaluation Boards for the AD62x, AD822x and AD842x SeriesPDF 604 kB
    Technical Books
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD8225ARZ Production8 ld SOICOTH 98-40 to 85C3.963.36Y
    AD8225ARZ-R7 Production8 ld SOICREEL 1000-40 to 85C3.963.36Y
    AD8225ARZ-RL Production8 ld SOICREEL 2500-40 to 85C3.963.36Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    AD8225-EVALZEvaluation Board74.58Y
    Reference Materials
    AD623: Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier Data Sheet (Rev. E) ad623
    AD623A SABER Macro-Model Rev. A, 4/01 ad623
    AD623ARM SABER Macro-Model Rev. A, 4/01 ad623
    AD623B SABER Macro-Model Rev. A, 4/01 ad623
    AN-282: Fundamentals of Sampled Data Systems ad1674
    AN-671: 降低仪表放大器电路中的射频干扰整流误差 (Rev. 0) amp03
    AN-244: IC 仪表放大器用户指南 amp03
    AN-589: 差动放大器性能优化方法 (Rev. 0) ad8350
    AN-282: 采样数据系统基本原理[中文版] (Rev. A) ad75019
    AN-244: A User's Guide to I.C. Instrumentation Amplifiers amp03
    AN-245: Instrumentation Amplifiers Solve Unusual Design Problems amp03
    AN-671: Reducing RFI Rectification Errors in In-Amp Circuits amp03
    AN-589: Ways to Optimize the Performance of a Difference Amplifier (Rev. B) ad8350
    UG-261: Evaluation Boards for the AD62x, AD822x and AD842x Series ad620
    Auto-Zero Amplifiers ad693
    Protecting Instrumentation Amplifiers ad620
    The AD8221 - Setting a New Industry Standard for Instrumentation Amplifiers amp03
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