OPA381 Status:ACTIVE

Precision, Low Power, High-Speed Transimpedance Amplifier

      
         
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Datasheet

Download - PDF Icon
  • OPA381, OPA2381: Precision, Low Power, 18MHz Transimpedance Amplifier (Rev. B) (opa381.pdf, 866 KB)
    18 Nov 2004 Download

 OPA381
Number of Channels1  
Total Supply Voltage (V)(Min)(+5V=5, +/-5V=10)2.7  
Total Supply Voltage (V)(Max)(+5V=5, +/-5V=10)5.5  
Iq per channel(Max)(mA)1  
GBW(Typ)(MHz)18  
Slew Rate(Typ)(V/us)12  
VIO (25 deg C)(Max)(mV)0.025  
Offset Drift(Typ)(uV/C)0.03  
IIB(Max)(pA)50  
CMRR(Min)(dB)95  
Vn at 1kHz(Typ)(nV/rtHz)114  
Rail-RailOut  
RatingCatalog  
Pin/Package8MSOP,8SON  
Operating Temp Range(Celsius)-40 to 125  
Approx. Price (US$) 1.85 | 100u  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • OPA380: High Speed Precision Transimpedance Amplifier
  • TPS5430: 5.5V to 36V Input, 3-A Step Down Converter
  • OPA2380: High Speed Precision Transimpedance Amplifier
  • Product Information

    Features

    • OVER 250kHz TRANSIMPEDANCE BANDWIDTH
    • DYNAMIC RANGE: 5 Decades
    • EXCELLENT LONG-TERM STABILITY
    • LOW VOLTAGE NOISE: 10nV/Hz
    • BIAS CURRENT: 3pA
    • OFFSET VOLTAGE: 25µV (max)
    • OFFSET DRIFT: 0.1µV/°C (max)
    • GAIN BANDWIDTH: 18MHz
    • QUIESCENT CURRENT: 800µA
    • FAST OVERLOAD RECOVERY
    • SUPPLY RANGE: 2.7V to 5.5V
    • SINGLE AND DUAL VERSIONS
    • MicroPACKAGE: DFN-8, MSOP-8
    • APPLICATIONS
      • PRECISION I/V CONVERSION
      • PHOTODIODE MONITORING
      • OPTICAL AMPLIFIERS
      • CAT-SCANNER FRONT-END
      • PHOTO LAB EQUIPMENT

    All trademarks are the property of their respective owners.

    Description

    The OPA381 family of transimpedance amplifiers provides 18MHz of Gain Bandwidth (GBW), with extremely high precision, excellent long-term stability, and very low 1/f noise. The OPA381 features an offset voltage of 25µV (max), offset drift of 0.1µV/°C (max), and bias current of 3pA. The OPA381 far exceeds the offset, drift, and noise performance that conventional JFET op amps provide.

    The signal bandwidth of a transimpedance amplifier depends largely on the GBW of the amplifier and the parasitic capacitance of the photodiode, as well as the feedback resistor. The 18MHz GBW of the OPA381 enables a trans-impedance bandwidth of >: 250kHz in most configurations. The OPA381 is ideally suited for fast control loops for power level measurement on an optical fiber.

    As a result of the high precision and low-noise characteristics of the OPA381, a dynamic range of 5 decades can be achieved. This capability allows the measurement of signal currents in the order of 10nA, and up to 1mA in a single I/V conversion stage. In contrast to logarithmic amplifiers, the OPA381 provides very wide bandwidth throughout the full dynamic range. By using an external pulldown resistor to –5V, the output voltage range can be extended to include 0V.

    The OPA381 and OPA2381 are both available in MSOP-8 and DFN-8 (3mm x 3mm) packages. They are specified from –40°C to +125°C.

        

    Pricing / Packaging / CAD Design Tools / Samples

    Price ($US)PackagingCAD Design ToolsSamples
    DeviceStatusTemp (oC)Price ($US) | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
    OPA381AIDGKRACTIVE-40 to 1251.85 | 100uMSOP (DGK) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    OPA381AIDGKRG4ACTIVE-40 to 1251.85 | 100uMSOP (DGK) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    OPA381AIDGKTACTIVE-40 to 1252.00 | 100uMSOP (DGK) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
    OPA381AIDGKTG4ACTIVE-40 to 1252.00 | 100uMSOP (DGK) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
    OPA381AIDRBRACTIVE-40 to 1251.85 | 100uSON (DRB) | 8 View 3000 | LARGE T&R Download CAD Format for this Symbol Purchase Samples
    OPA381AIDRBRG4ACTIVE-40 to 1251.85 | 100uSON (DRB) | 8 View 3000 | LARGE T&R Download CAD Format for this Symbol Purchase Samples
    OPA381AIDRBTACTIVE-40 to 1252.00 | 100uSON (DRB) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol 
    OPA381AIDRBTG4ACTIVE-40 to 1252.00 | 100uSON (DRB) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol 

    * Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

    Inventory

      TI Inventory Status Reported Distributor Inventory
    OPA381AIDGKRAs of 8:48 AM GMT, 29 Aug 2008As of 8:48 AM GMT, 29 Aug 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 20 Oct 8 Weeks None Reported
    View Distributors
       
    OPA381AIDGKRG4As of 8:48 AM GMT, 29 Aug 2008As of 8:48 AM GMT, 29 Aug 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 20 Oct 8 Weeks None Reported
    View Distributors
       
    OPA381AIDGKTAs of 8:48 AM GMT, 29 Aug 2008As of 8:48 AM GMT, 29 Aug 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 20 Oct 8 Weeks AmericasDigiKey 46
      Rochester Electronics >1k
    OPA381AIDGKTG4As of 8:48 AM GMT, 29 Aug 2008As of 8:48 AM GMT, 29 Aug 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 20 Oct 8 Weeks None Reported
    View Distributors
       
    OPA381AIDRBRAs of 8:48 AM GMT, 29 Aug 2008As of 8:48 AM GMT, 29 Aug 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 3 Nov 12 Weeks None Reported
    View Distributors
       
    OPA381AIDRBRG4As of 8:48 AM GMT, 29 Aug 2008As of 8:48 AM GMT, 29 Aug 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 3 Nov 12 Weeks None Reported
    View Distributors
       
    OPA381AIDRBTAs of 8:48 AM GMT, 29 Aug 2008As of 8:48 AM GMT, 29 Aug 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 13 Nov 12 Weeks AmericasDigiKey 236
      Rochester Electronics >1k
    OPA381AIDRBTG4As of 8:48 AM GMT, 29 Aug 2008As of 8:48 AM GMT, 29 Aug 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 13 Nov 12 Weeks None Reported
    View Distributors
       
    View all Distributors  

    * Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

    ** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

    Quality & Lead (Pb)-Free Data

     Product ContentDPPM / MTBF / FIT Rate
    DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
    OPA381AIDGKR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    OPA381AIDGKRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    OPA381AIDGKT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    OPA381AIDGKTG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    OPA381AIDRBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    OPA381AIDRBRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    OPA381AIDRBT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    OPA381AIDRBTG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView

    * The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

    If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

    Technical Documents

    Datasheets

    • OPA381, OPA2381: Precision, Low Power, 18MHz Transimpedance Amplifier (Rev. B) (opa381.pdf, 866 KB)
      18 Nov 2004 Download

    Application Notes

    • Shelf-Life Evaluation of Lead-Free Component Finishes (szza046.htm, 8 KB)
      24 May 2004 Abstract
    • Thermal and Electrical Properties of Selected Packaging Materials (sbfa010.htm, 8 KB)
      04 Oct 2000 Abstract
    • Tuning in Amplifiers (sboa067.htm, 8 KB)
      02 Oct 2000 Abstract
    • Single-Supply Operation of Operational Amplifiers (sboa059.htm, 8 KB)
      02 Oct 2000 Abstract
    • Op Amp Performance Analysis (sboa054.htm, 8 KB)
      02 Oct 2000 Abstract
    • High Speed Data Conversion (sbaa045.htm, 8 KB)
      02 Oct 2000 Abstract

    Simulation Models

    • Spice Model
      • OPA381 PSpice Macro Model and Test Circuit (sboc073.zip, 4 KB)
        28 Apr 2005 zip

    Tools & Software

    NamePart # Company Tool / Software Type
    Analog Filter DesignFILTER-DESIGNERTexas InstrumentsAnalysis Software
    Automatic Resistor/Capacitor Calculator for Passive FiltersRC-FILTER-CALCTexas InstrumentsCalculation Utilities
    Decibel CalculatorDECIBEL-CALCTexas InstrumentsCalculation Utilities
    Frequency/Wavelength CalculatorFREQ-WAVE-CALCTexas InstrumentsCalculation Utilities
    Noise Calculator, Generator and ExamplesOPAMP-NOISECALCTexas InstrumentsCalculation Utilities
    Op Amp Gain Stage CalculatorGAIN-STAGE-CALCTexas InstrumentsCalculation Utilities
    Resistor Calculator for Op Amp Gain and Zero ShiftRESISTOR-CALCTexas InstrumentsCalculation Utilities
    Universal EVM for Single/Dual OpAmps without Shutdown in MSOP/SOIC/SOT-23 PackagesOPAMPEVM-SOT23Texas InstrumentsDevelopment Boards/EVMs
    SPICE-Based Analog Simulation ProgramTINA-TITexas InstrumentsSimulators
    MDACBufferPro Output Buffer Amplifier Selection ToolMDACBUFFERPRO Texas Instruments Application Software 
    Active Filter Design ApplicationFILTERPRO Texas Instruments Application Software 

     Complementary Products - Can be used with OPA381
    Part #NameProduct FamilyComments
    ADS8325 16-Bit, 100kSPS Serial Out, 2.7V to 5.5V Micro Power Sampling ADC DATA CONVERTERS- ANALOG TO DIGITAL CONVERTERS 16-Bit, High-Speed, 2.7V to 5V microPower Sampling A/D Converter  
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