AD823 16 MHz, Rail-to-Rail FET Input Dual Amplifier

OUT ≤ 100 μA, providing outstanding output dynamic range. An offset voltage of 800 μV maximum, an offset voltage drift of 2 μV/°C, input bias currents below 25 pA, and low input voltage noise provide dc precision with source impedances up to a Gigaohm. It provides 16 MHz, −3 dB bandwidth, −108 dB THD @ 20 kHz, and a 22 V/μs slew rate with a low supply current of 2.6 mA per amplifier. The AD823 drives up to 500 pF of direct capacitive load as a follower and provides an output current of 15 mA, 0.5 V from the supply rails. This allows the amplifier to handle a wide range of load conditions. This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for applications such as A/D drivers, high speed active filters, and other low voltage, high dynamic range systems. The AD823 is available over the industrial temperature range of −40°C to +85°C and is offered in both 8-lead PDIP and 8-lead SOIC packages. Applications Battery-powered precision instrumentation Photodiode preamps Active filters 12-bit to 16-bit data acquisition systems Medical instrumentation

The AD823 is a dual precision, 16 MHz, JFET input op amp that can operate from a single supply of 3.0 V to 36 V or from dual supplies of ±1.5 V to ±18 V. It has true single-supply capability with an input voltage range extending below ground in single-supply mode. Output voltage swing extends to within 50 mV of each rail for I

An offset voltage of 800 μV maximum, an offset voltage drift of 2 μV/°C, input bias currents below 25 pA, and low input voltage noise provide dc precision with source impedances up to a Gigaohm. It provides 16 MHz, −3 dB bandwidth, −108 dB THD @ 20 kHz, and a 22 V/μs slew rate with a low supply current of 2.6 mA per amplifier. The AD823 drives up to 500 pF of direct capacitive load as a follower and provides an output current of 15 mA, 0.5 V from the supply rails. This allows the amplifier to handle a wide range of load conditions.

This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for applications such as A/D drivers, high speed active filters, and other low voltage, high dynamic range systems.

The AD823 is available over the industrial temperature range of −40°C to +85°C and is offered in both 8-lead PDIP and 8-lead SOIC packages.

Applications
  • Battery-powered precision instrumentation
  • Photodiode preamps
  • Active filters
  • 12-bit to 16-bit data acquisition systems
  • Medical instrumentation
Features and Benefits
  • Single-supply operation
    - Output swings rail-to-rail
    - Input voltage range extends below ground
    - Single-supply capability from 3 V to 36 V
  • High load drive
    - Capacitive load drive of 500 pF, G = +1 - Output current of 15 mA, 0.5 V from supplies
  • Low distortion: −108 dBc worst harmonic @ 20 kHz
  • Low noise: 16 nV/√Hz @ 10 kHz
  • Good dc performance
    - 800 μV max input offset voltage
    - 2 μV/°C offset voltage drift
    - 25 pA maximum input bias current
  • Excellent ac performance on 2.6 mA/amplifier
    −3 dB bandwidth of 16 MHz, G = +1
    - 350 ns settling time to 0.01% (2 V step)
    - Slew rate of 22 V/μs
  • No phase inversion with inputs to the supply rails
  • Amplifiers
    SPICE Models
    Data Sheets
    Documentnote
    AD823: Dual, 16 MHz, Rail-to-Rail FET Input Amplifier Data Sheet (Rev. E)PDF 459 kB
    Application Notes
    Documentnote
    AN-253: Find Op Amp Noise with SpreadsheetPDF 77 kB
    AN-402: Replacing Output Clamping Op Amps with Input Clamping AmpsPDF 55 kB
    AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0)PDF 166 kB
    AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed SystemsPDF 228 kB
    AN-257: Careful Design Tames High Speed Op AmpsPDF 611 kB
    AN-108: JFET-Input Amps are Unrivaled for Speed and AccuracyPDF 499 kB
    AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0)PDF 5.3 M
    User Guides
    Documentnote
    UG-128: Universal Evaluation Board for Dual High Speed Op Amps in SOIC PackagesPDF 208 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD823ANZ Production8 ld PDIPOTH 50-40 to 85C3.563.21Y
    AD823AR Production8 ld SOICOTH 98-40 to 85C3.563.21N
    AD823AR-REEL Production8 ld SOICREEL 2500-40 to 85C03.21N
    AD823AR-REEL7 Production8 ld SOICREEL 750-40 to 85C3.563.21N
    AD823ARZ Production8 ld SOICOTH 98-40 to 85C3.242.92Y
    AD823ARZ-R7 Production8 ld SOICREEL 750-40 to 85C3.242.92Y
    AD823ARZ-RL Production8 ld SOICREEL 2500-40 to 85C02.92Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-HSAMP-2CPZ-10Evaluation Bare Board for 10-Lead LFCSP18.25Y
    EVAL-HSAMP-2CPZ-8Evaluation Bare Board for 8-Lead LFCSP18.25Y
    EVAL-HSAMP-2RMZ-10Evaluation Bare Board for 10-lead MSOP Package18.25Y
    EVAL-HSAMP-2RMZ-8Evaluation Bare Board for 8 Lead MSOP18.25Y
    EVAL-HSAMP-2RZ-8Evaluation Bare Board for 8 Lead SOIC18.25Y
    Reference Materials
    AD823: Dual, 16 MHz, Rail-to-Rail FET Input Amplifier Data Sheet (Rev. E) ad823
    AD823 SPICE Macro-Model ad823
    AN-253: Find Op Amp Noise with Spreadsheet ad8074
    AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps ad829
    AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0) ad829
    AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems ad829
    AN-257: Careful Design Tames High Speed Op Amps ad8074
    AN-108: JFET-Input Amps are Unrivaled for Speed and Accuracy ad823
    AN-402: 以输入箝位放大器取代输出箝位运算放大器 (Rev. 0) ad829
    AN-417: 在低压高速系统中利用快速轨到轨运算放大器减少设计限制 (Rev. 0) ad829
    AN-581: 单电源应用中的偏置和去耦运算放大器 (Rev. 0) ad829
    AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0) ad8350
    UG-128:SOIC封装的双通道高速运算放大器通用评估板 ad8042
    UG-128: Universal Evaluation Board for Dual High Speed Op Amps in SOIC Packages ad8042
    MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps ad829
    MT-032:理想的电压反馈型(VFB)运算放大器 ad829
    MT-058: 反馈电容对VFB和CFB运算放大器的影响 ad829
    MT-056: 高速电压反馈运算放大器 ad829
    MT-053:运算放大器失真:HD、THD、THD + N、IMD、SFDR、MTPR ad829
    MT-052:运算放大器噪声指数:不要被误导 ad829
    MT-050: 二阶系统的运算放大器总输出噪声计算 ad9631
    MT-049:单极点系统的运算放大器总输出噪声计算 ad829
    MT-048:运算放大器噪声关系:1/f噪声、均方根(RMS)噪声与等效噪声带宽 ad829
    MT-047:运算放大器噪声 ad829
    MT-033:电压反馈型运算放大器的增益和带宽 ad829
    MT-032: Ideal Voltage Feedback (VFB) Op Amp ad829
    High Speed Amplifiers Selection Table ad8138