AD629 High Common-Mode Voltage, Difference Amplifier

The AD629 can replace costly isolation amplifiers in applications that do not require galvanic isolation. The device operates over a ±270 V common-mode voltage range and has inputs that are protected from common-mode or differential mode transients up to ±500 V. The AD629 has low offset, low offset drift, low gain error drift, low common-mode rejection drift, and excellent CMRR over a wide frequency range. The AD629 is available in low cost, 8-lead PDIP and 8-lead SOIC packages. For all packages (including die) and grades, performance is guaranteed over the industrial temperature range of −40°C to +85°C. Applications High voltage current sensing Battery cell voltage monitors Power supply current monitors Motor controls Isolation

The AD629 is a difference amplifier with a very high input, common-mode voltage range. It is a precision device that allows the user to accurately measure differential signals in the presence of high common-mode voltages up to ±270 V.

The AD629 can replace costly isolation amplifiers in applications that do not require galvanic isolation. The device operates over a ±270 V common-mode voltage range and has inputs that are protected from common-mode or differential mode transients up to ±500 V.

The AD629 has low offset, low offset drift, low gain error drift, low common-mode rejection drift, and excellent CMRR over a wide frequency range.

The AD629 is available in low cost, 8-lead PDIP and 8-lead SOIC packages. For all packages (including die) and grades, performance is guaranteed over the industrial temperature range of −40°C to +85°C.

Applications
  • High voltage current sensing
  • Battery cell voltage monitors
  • Power supply current monitors
  • Motor controls
  • Isolation
Features and Benefits
  • Improved replacement for: INA117P and INA117KU
  • ±270 V common-mode voltage range
  • Input protection to
    ±500 V common mode
    ±500 V differential mode
    Wide power supply range (±2.5 V to ±18 V)
    ±10 V output swing on ±12 V supply
    1 mA maximum power supply current
  • HIGH ACCURACY DC PERFORMANCE
    3 ppm maximum gain nonlinearity (AD629B)
    20 μV/°C maximum offset drift (AD629A)
    10 μV/°C maximum offset drift (AD629B)
    10 ppm/°C maximum gain drift
  • EXCELLENT AC SPECIFICATIONS
    77 dB minimum CMRR @ 500 Hz (AD629A)
    86 dB minimum CMRR @ 500 Hz (AD629B)
    500 kHz bandwidth
    • Amplifiers
    Building Technology
    • White Goods and Vending
    Aerospace and Defense
    • Solutions
    SPICE Models
    Reference Designs
    Data Sheets
    Documentnote
    AD629: High Common-Mode Voltage, Difference Amplifier Data Sheet (Rev. C)PDF 534 kB
    Application Notes
    Documentnote
    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
    Technical Books
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD629AC-WP ProductionCHIPS OR DIEREEL 165-40 to 85C00Y
    AD629ANZ Production8 ld PDIPOTH 50-40 to 85C3.953.36Y
    AD629AR Production8 ld SOICOTH 98-40 to 85C3.863.29N
    AD629AR-REEL Production8 ld SOICREEL 2500-40 to 85C03.29N
    AD629AR-REEL7 Production8 ld SOICREEL 1000-40 to 85C03.29N
    AD629ARZ Production8 ld SOICOTH 98-40 to 85C3.422.9Y
    AD629ARZ-R7 Production8 ld SOICREEL 1000-40 to 85C02.9Y
    AD629ARZ-RL Production8 ld SOICREEL 2500-40 to 85C02.9Y
    AD629BNZ Production8 ld PDIPOTH 50-40 to 85C6.095.16Y
    AD629BR Production8 ld SOICOTH 98-40 to 85C5.965.05N
    AD629BR-REEL Production8 ld SOICREEL 2500-40 to 85C05.05N
    AD629BR-REEL7 Production8 ld SOICREEL 1000-40 to 85C05.05N
    AD629BRZ Production8 ld SOICOTH 98-40 to 85C5.284.47Y
    AD629BRZ-R7 Production8 ld SOICREEL 1000-40 to 85C04.47Y
    AD629BRZ-RL Production8 ld SOICREEL 2500-40 to 85C04.47Y
    Reference Materials
    AD629: High Common-Mode Voltage, Difference Amplifier Data Sheet (Rev. C) ad629
    AD629A SPICE Macro-Model Minimum Values ad629
    AD629A SPICE Macro-Model Typical Values ad629
    AD629B SPICE Macro-Model Minimum Values ad629
    AD629B SPICE Macro-Model Typical Values ad629
    CN0240 设计和集成文件 ad8475
    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-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
    CN0240: 具有270 V共模抑制性能的双向隔离式高端电流检测模块 ad8475
    CN-0100: Measuring −48 V High-Side Current Using the AD629 Difference... ad7453
    The AD8221 - Setting a New Industry Standard for Instrumentation Amplifiers amp03
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