AD8037 Low Distortion, Wide Bandwidth Voltage Feedback Clamp Amps

The AD8036 and AD8037 are wide bandwidth, low distortion clamping amplifiers. The AD8036 is unity gain stable. The AD8037 is stable at a gain of two or greater. These devices allow the designer to specify a high (VCH) and low (VCL) output clamp voltage. The output signal will clamp at these specified levels. Utilizing a unique patent pending CLAMPIN™ input clamp architecture, the AD8036 and AD8037 offer a 10 ×improvement in clamp performance compared to traditional out-V put clamping devices. In particular, clamp error is typically 3 mV or less and distortion in the clamp region is minimized. This product can be used as a classical op amp or a clamp amplifier where a high and low output voltage are specified.

The AD8036 and AD8037, which utilize a voltage feedback architecture, meet the requirements of many applications which previously depended on current feedback amplifiers. The AD8036 and AD8037 exhibit an exceptionally fast and accurate pulse response (16 ns to 0.01%), extremely wide small-signal and large-signal bandwidths and ultralow distortion. The AD8036 achieves -66 dBc at 20 MHz, and 240 MHz small-signal and 195 MHz large-signal bandwidths. The AD8036 and AD8037's recover from 2× clamp overdrive within 1.5 ns. These characteristics position the AD8036/AD8037 ideally for driving as well as buffering flash and high resolution ADCs.

In addition to traditional output clamp amplifier applications, the input clamp architecture supports the clamp levels as additional inputs to the amplifier. As such, in addition to static dc clamp levels, signals with speeds up to 240 MHz can be applied to the clamp pins. The clamp values can also be set to any value within the output voltage range provided that VH is greater that VL. Due to these clamp characteristics, the AD8036 and AD8037 can be used in nontraditional applications such as a full-wave rectifier, a pulse generator, or an amplitude modulator. These novel applications are only examples of some of the diverse applications which can be designed with input clamps.

The AD8036 is offered in chips, industrial (-40°C to +85°) and military (-55°C to +125°C) package temperature ranges and the AD8037 in industrial. Industrial versions are available in plastic DIP and SOIC; MIL versions are packaged in cerdip.

Applications

Features and Benefits
  • Superb clamping characteristics
  • 3 mV clamp error
  • 1.5 ns overdrive recovery
  • Minimized nonlinear clamping region
  • 240 MHz clamp input bandwidth
  • ±3.9 V clamp input range
  • Wide bandwidth
  • Small signal: 270 MHz
  • Large signal (4 V p-p): 190 MHz
  • Good DC characteristics
  • 2 mV offset
  • 10 μV/°C drift
  • See data sheet for additional features
  • Download AD8037-EP data sheet
  • Extended industrial temperature range: −55°C to +105°C
  • Controlled manufacturing baseline
  • One assembly/test site
  • One fabrication site
  • Product change notification
  • Qualification data available on request
  • Amplifiers
    Data Sheets
    Documentnote
    AD8036/AD8037: Low Distortion, Wide Bandwidth Voltage Feedback Clamp Amps Data Sheet (Rev. B)PDF 428 kB
    AD8037-EP: Enhanced Product Data Sheet (Rev. 0)PDF 171.31 K
    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-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed SystemsPDF 228 kB
    AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0)PDF 5.3 M
    User Guides
    Documentnote
    UG-460: Evaluation Board for Single, High Speed Operational Amplifiers (8-Lead SOIC)PDF 369 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD8037ACHIPS ProductionCHIPS OR DIEREEL 210-40 to 85C014.04Y
    AD8037ARZ Production8 ld SOICOTH 98-40 to 85C5.34.5Y
    AD8037ARZ-REEL Production8 ld SOICREEL 2500-40 to 85C04.5Y
    AD8037ARZ-REEL7 Production8 ld SOICREEL 750-40 to 85C04.5Y
    AD8037SRZ-EP Production8 ld SOICOTH 98-55 to 105C10.879.23Y
    AD8037SRZ-EP-R7 Production8 ld SOICREEL 1000-55 to 105C09.23Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    AD8037-EBZEvaluation Board18.25Y
    Reference Materials
    AD8036/AD8037: Low Distortion, Wide Bandwidth Voltage Feedback Clamp Amps Data Sheet (Rev. B) ad8036
    AD8037-EP: Enhanced Product Data Sheet (Rev. 0) ad8037
    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-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-460: Evaluation Board for Single, High Speed Operational Amplifiers (8-Lead SOIC) ad8036
    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