AD844 60 MHz, 2000 V/µs Monolithic Op Amp

This type of op amp provides a closed-loop bandwidth which is determined primarily by the feedback resistor and is almost independent of the closed-loop gain. The AD844 is free from the slew rate limitations inherent in traditional op amps and other current-feedback op amps. Peak output rate of change can be over 2000 V/µs for a full 20 V output step. Settling time is typically 100 ns to 0.1%, and essentially independent of gain. The AD844 can drive 50 Ohm loads to ±2.5 V with low distortion and is short circuit protected to 80 mA. The AD844 is available in four performance grades and three package options. In the 16-pin SOIC (R) package, the AD844J is specified for the commercial temperature range of 0°C to +70°C. The AD844A and AD844B are specified for the industrial temperature range of -40°C to +85°C and are available in the cerdip (Q) package. The AD844A is also available in an 8-pin plastic mini-DIP (N). The AD844S is specified over the military temperature range of -55°C to +125°C. It is available in the 8-pin cerdip (Q) package. "A" and "S" grade chips and devices processed to MIL-STD-883B, REV. C are also available.

The AD844 is a high speed monolithic operational amplifier fabricated using Analog Devices' junction isolated complementary bipolar (CB) process. It combines high bandwidth and very fast large signal response with excellent dc performance. Although optimized for use in current to voltage applications and as an inverting mode amplifier, it is also suitable for use in many non-inverting applications.

The AD844 can be used in place of traditional op amps, but its current feedback architecture results in much better ac performance, high linearity and an exceptionally clean pulse response.

This type of op amp provides a closed-loop bandwidth which is determined primarily by the feedback resistor and is almost independent of the closed-loop gain. The AD844 is free from the slew rate limitations inherent in traditional op amps and other current-feedback op amps. Peak output rate of change can be over 2000 V/µs for a full 20 V output step. Settling time is typically 100 ns to 0.1%, and essentially independent of gain. The AD844 can drive 50 Ohm loads to ±2.5 V with low distortion and is short circuit protected to 80 mA.

The AD844 is available in four performance grades and three package options. In the 16-pin SOIC (R) package, the AD844J is specified for the commercial temperature range of 0°C to +70°C. The AD844A and AD844B are specified for the industrial temperature range of -40°C to +85°C and are available in the cerdip (Q) package. The AD844A is also available in an 8-pin plastic mini-DIP (N). The AD844S is specified over the military temperature range of -55°C to +125°C. It is available in the 8-pin cerdip (Q) package. "A" and "S" grade chips and devices processed to MIL-STD-883B, REV. C are also available.

Features and Benefits
  • Wide Bandwidth: 60 MHz at Gain of -1
  • Wide Bandwidth: 33 MHz at Gain of -10
  • Very High Output Slew Rate: Up to 2000 V/µs
  • 20 MHz Full Power Bandwidth, 20 V p-p,
    RL = 500 Ω
  • Fast Settling: 100 ns to 0.1% (10 V Step)
  • Differential Gain Error: 0.03% at 4.4 MHz
  • Differential Phase Error: 0.158 at 4.4 MHz
  • Low Offset Voltage: 150 mV Max (B Grade)
  • Low Quiescent Current: 6.5 mA
  • Available in Tape and Reel in
    Accordance with EIA-481A Standard
  • Amplifiers
    AD844 SPICE Macro-Model
    Data Sheets
    Documentnote
    AD844: 60 MHz, 2000 V/µs Monolithic Op Amp Data Sheet (Rev. F)PDF 430 kB
    AD844: Military Data Sheet
    Application Notes
    Documentnote
    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-214: Ground Rules for High Speed CircuitsPDF 356 kB
    AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed SystemsPDF 228 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    5962-8964401PA Production8 ld CerDIPOTH 48-55 to 125C40.0936.24N
    AD844ACHIPS ProductionCHIPS OR DIEREEL 100-40 to 85C06.67Y
    AD844AN Production8 ld PDIPOTH 50-40 to 85C4.553.4N
    AD844ANZ Production8 ld PDIPOTH 50-40 to 85C4.143.09Y
    AD844AQ Production8 ld CerDIPOTH 48-40 to 85C7.265.43N
    AD844BQ Production8 ld CerDIPOTH 48-40 to 85C9.767.3N
    AD844JRZ-16 Production16 ld SOIC - WideOTH 470 to 70C4.323.23Y
    AD844JRZ-16-REEL7 Production16 ld SOIC - WideREEL 2500 to 70C03.23Y
    AD844SCHIPS ProductionCHIPS OR DIEREEL 100-55 to 125C25.5123.19Y
    AD844SQ Production8 ld CerDIPOTH 48-55 to 125C19.7318.73N
    AD844SQ/883B Production8 ld CerDIPOTH 48-55 to 125C36.4532.8N
    Reference Materials
    AD844: 60 MHz, 2000 V/µs Monolithic Op Amp Data Sheet (Rev. F) ad844
    AD844 SPICE Macro-Model Rev. A, 7/91 ad844
    AD844A SPICE Macro-Model Rev. A, 7/91 ad844
    AD844B SPICE Macro-Model Rev. A, 7/91 ad844
    AD844S SPICE Macro-Model Rev. A, 7/91 ad844
    AD844: Military Data Sheet ad844
    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-214: Ground Rules for High Speed Circuits ad1674
    AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems ad829
    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
    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-059: 补偿输入电容对电流电压转换器所用电压反馈和电流反馈型运算放大器的影响 ad9631
    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