AD626 Low Cost, Single-Supply Differential Amplifier

The amplifier's inputs are protected against continuous overload of up to 50 V, and RFI filters are included in the attenuator network. The output range is +0.03 V to +4.9 V using a +5 V supply. The amplifier provides a preset gain of 10, but gains between 10 to 100 can be easily configured with an external resistor. Furthermore, a gain of 100 is available by connecting the G = 100 pin to analog ground. The AD626 also offers low-pass filter capability by connecting a capacitor between the filter pin and analog ground. The AD626A and AD626B operate over the industrial temperature range of -40°C to +85°C. The AD626 is available in two 8-pin packages: a plastic mini-DIP and SOIC.

The AD626 is a low cost, true single supply differential amplifier designed for amplifying and low-pass filtering small differential voltages from sources having a large common-mode voltage.

The AD626 can operate from either a single supply of +2.4 V to +10 V, or dual supplies of ±1.2 V to ±6 V. The input common-mode range of this amplifier is equal to 6 (+VS - 1 V) which provides a +24 V CMR while operating from a +5 V supply. Furthermore, the AD626 features a CMR of 90 dB typ.

The amplifier's inputs are protected against continuous overload of up to 50 V, and RFI filters are included in the attenuator network. The output range is +0.03 V to +4.9 V using a +5 V supply. The amplifier provides a preset gain of 10, but gains between 10 to 100 can be easily configured with an external resistor. Furthermore, a gain of 100 is available by connecting the G = 100 pin to analog ground. The AD626 also offers low-pass filter capability by connecting a capacitor between the filter pin and analog ground.

The AD626A and AD626B operate over the industrial temperature range of -40°C to +85°C. The AD626 is available in two 8-pin packages: a plastic mini-DIP and SOIC.

Features and Benefits
  • Pin Selectable Gains of 10 and 100
  • True Single-Supply Operation
    Single-Supply Range of +2.4V to +10V
    Dual-Supply Range of ±1.2V to ±6V
    Wide Output Voltage Range of 30 mV to 4.7V
  • Includes Input Protection
    Series Resistive Inputs
    (RIN = 200 kΩ)
    RFI Filters Included
    Allows 50V Continuous Overload
  • Optional Low-Pass Filtering
  • Excellent DC Performance
    Low Input Offset Voltage: 500 µV Max
    Large Common-Mode Range:
    0V to +54V
    Low Power: 1.2 mW (VS = +5V)
    Good CMR of 90 dB Typ
  • AC Performance
    Fast Settling Time: 24 µs (0.01%)
  • Amplifiers
    AD626 SPICE Macro-Model
    Data Sheets
    Documentnote
    AD626: Low Cost, Single Supply Differential Amplifier Data Sheet (Rev. D)PDF 366 kB
    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
    Technical Books
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD626ANZ Production8 ld PDIPOTH 50-40 to 85C4.844.36Y
    AD626AR Production8 ld SOICOTH 98-40 to 85C4.734.27N
    AD626AR-REEL7 Production8 ld SOICREEL 750-40 to 85C04.27N
    AD626ARZ Production8 ld SOICOTH 98-40 to 85C4.193.77Y
    AD626ARZ-REEL Production8 ld SOICREEL 2500-40 to 85C03.77Y
    AD626ARZ-REEL7 Production8 ld SOICREEL 750-40 to 85C03.77Y
    AD626BNZ Production8 ld PDIPOTH 50-40 to 85C6.615.97Y
    Reference Materials
    AD626: Low Cost, Single Supply Differential Amplifier Data Sheet (Rev. D) ad626
    AD626 SPICE Macro-Model Rev. A, 11/95 ad626
    AD626A SPICE Macro-Model Rev. A, 11/95 ad626
    AD626B SPICE Macro-Model Rev. A, 11/95 ad626
    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
    Auto-Zero Amplifiers ad693
    The AD8221 - Setting a New Industry Standard for Instrumentation Amplifiers amp03