AD8479 Very High Common-Mode Voltage Precision Difference Amplifier

The AD8479 has low offset, low offset drift, low gain error drift, low common-mode rejection drift, and excellent CMRR over a wide frequency range. The AD8479 is available in a space-saving 8-lead SOIC package. It is operational over the −40°C to +125°C temperature range. APPLICATIONS High voltage current sensing Battery cell voltage monitor Power supply current monitor Motor controls Isolation

The AD8479 is a difference amplifier with a very high input common-mode voltage range. The AD8479 is a precision device that allows the user to accurately measure differential signals in the presence of high common-mode voltages up to ±600 V. The AD8479 can replace costly isolation amplifiers in applications that do not require galvanic isolation. The device operates over a ±600 V common-mode voltage range and has inputs that are protected from common-mode or differential mode transients up to ±600 V.

The AD8479 has low offset, low offset drift, low gain error drift, low common-mode rejection drift, and excellent CMRR over a wide frequency range.

The AD8479 is available in a space-saving 8-lead SOIC package. It is operational over the −40°C to +125°C temperature range.

APPLICATIONS
  • High voltage current sensing
  • Battery cell voltage monitor
  • Power supply current monitor
  • Motor controls
  • Isolation
Features and Benefits
  • ±600 V common-mode voltage range
  • Rail-to-rail output
  • Fixed gain of 1
  • Wide power supply range of
    ±2.5 V to ±18 V
  • 550 μA typical power supply current
  • Excellent ac specifications
    -- 90 dB minimum CMRR
    -- 130 kHz bandwidth
  • High accuracy dc performance
    -- 5 ppm maximum gain nonlinearity
    -- 10 µV/°C maximum offset voltage drift
    -- 5 ppm/°C maximum gain drift
    • Amplifiers
    SPICE Models
    Data Sheets
    Documentnote
    AD8479: Very High Common-Mode Voltage Precision Difference Amplifier Data Sheet (Rev. A)PDF 402 kB
    Application Notes
    Documentnote
    AN-1375: Output Current Monitoring of High Voltage Class D Amplifiers (Rev. 0)PDF 182.84 K
    AN-1344: High Common-Mode Voltage Current Loop Transmitter Front End (Rev. 0)PDF 195.39 K
    AN-1308: Common-Mode Step Response of Current Sense Amplifiers (Rev. A)PDF 176 kB
    User Guides
    Documentnote
    AD8479: Evaluation Board for the Precision Difference Amplifier (Wiki site)WIKI
    Technical Books
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD8479ARZ Production8 ld SOICOTH 98-40 to 125C3.372.81Y
    AD8479ARZ-RL Production8 ld SOICREEL 2500-40 to 125C02.81Y
    AD8479BRZ Production8 ld SOICOTH 98-40 to 125C5.24.33Y
    AD8479BRZ-RL Production8 ld SOICREEL 2500-40 to 125C04.33Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    AD8479R-EBZEvaluation Board for 8 Lead SOIC15Y
    AD8479: Very High Common-Mode Voltage Precision Difference Amplifier Data Sheet (Rev. A) ad8479
    AD8479: 超高共模电压精密差动放大器 (Rev. 0) ad8479
    AD8479 SPICE Macro Model ad8479
    AN-1375: 高电压D类放大器的输出电流监控 (Rev. 0) ad8479
    AN-1375: Output Current Monitoring of High Voltage Class D Amplifiers (Rev. 0) ad8479
    AN-1344：高共模电压电流环路发送器前端 (Rev. 0) ad8479
    AN-1344: High Common-Mode Voltage Current Loop Transmitter Front End (Rev. 0) ad8479
    AN-1308: Common-Mode Step Response of Current Sense Amplifiers (Rev. A) ad8479
    AN-1308: 电流检测放大器共模阶跃响应 (Rev. 0) ad8479
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