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OPA381 Status: ACTIVE

Precision, Low Power, High-Speed Transimpedance Amplifier


      
         
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 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 | 1ku  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • OPA335: 0.05uV/C max, Single-Supply CMOS Operational Amplifier
  • OPA380: High Speed Precision Transimpedance Amplifier
  • OPT101: Monolithic Photodiode and Single-Supply Transimpedance Amplifier
  • ONET2511TA: 2.5 Gbps Transimpedance Amplifier with RSSI

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

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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

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
OPA381AIDGKRACTIVE-40 to 1251.85 | 1kuMSOP (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 | 1kuMSOP (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 | 1kuMSOP (DGK) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
OPA381AIDGKTG4ACTIVE-40 to 1252.00 | 1kuMSOP (DGK) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
OPA381AIDRBRACTIVE-40 to 1251.85 | 1kuSON (DRB) | 8 View 3000 | LARGE T&R Download CAD Format for this Symbol Purchase Samples
OPA381AIDRBRG4ACTIVE-40 to 1251.85 | 1kuSON (DRB) | 8 View 3000 | LARGE T&R Download CAD Format for this Symbol Purchase Samples
OPA381AIDRBTACTIVE-40 to 1252.00 | 1kuSON (DRB) | 8 View 250 | SMALL T&R Download CAD Format for this Symbol 
OPA381AIDRBTG4ACTIVE-40 to 1252.00 | 1kuSON (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

Reported Distributor Inventory as of 11:39 AM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 4 WeeksOPA381AIDGKR
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksOPA381AIDGKRG4
WorldwideDigiKey  Available
TI Lead Time*: 1 WeekOPA381AIDGKT
AmericasArrow 250
Newark 110
Rochester Electronics >1k
AsiaWPI 59
EuropeCompel 190
WorldwideDigiKey 207
TI Lead Time*: 1 WeekOPA381AIDGKTG4
WorldwideDigiKey  Available
Mouser Electronics 121
TI Lead Time*: 20 WeeksOPA381AIDRBR
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksOPA381AIDRBRG4
WorldwideDigiKey  Available
TI Lead Time*: 1 WeekOPA381AIDRBT
AmericasRochester Electronics >1k
WorldwideDigiKey 221
TI Lead Time*: 1 WeekOPA381AIDRBTG4
WorldwideDigiKey  Available
View all Distributors  

** 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

Most useful technical documents for OPA381 Help

Datasheet

Application Notes

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(TM) Output Buffer Amplifier Selection ToolMDACBUFFERPRO Texas Instruments Application Software 
Active Filter Design ApplicationFILTERPRO Texas Instruments Application Software 

Simulation Models

Part # Name Product Family Comments
ADS8325   16-Bit, 100kSPS Serial Out, 2.7V to 5.5V Micro Power Sampling ADC   DATA CONVERTERS - ANALOG TO DIGITAL CONVERTER   16-Bit, High-Speed, 2.7V to 5V microPower Sampling A/D Converter    
Customers Who Evaluated This Product Also Evaluated...
OPA335 0.05uV/C max, Single-Supply CMOS Operational Amplifier PRECISION AMPLIFIER-LOW OFFSET VOLTAGE TI customers also evaluated this product.
OPA380 High Speed Precision Transimpedance Amplifier HIGH SPEED AMPLIFIER-VOLTAGE FEEDBACK TI customers also evaluated this product.
OPT101 Monolithic Photodiode and Single-Supply Transimpedance Amplifier OPTOELECTRONIC PRODUCTS-LIGHT TO VOLTAGE TI customers also evaluated this product.
ONET2511TA 2.5 Gbps Transimpedance Amplifier with RSSI OPTICAL MODULE ICs-TRANSIMPEDANCE AMPLIFIER TI customers also evaluated this product.
OPA656 Wideband, Unity Gain Stable FET-Input Operational Amplifier HIGH SPEED AMPLIFIER-JFET/CMOS TI customers also evaluated this product.
OPA657 1.6GHz, Low Noise, Fet -Input Operational Amplifier HIGH SPEED AMPLIFIER-JFET/CMOS TI customers also evaluated this product.

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