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clear gifOPA129, Status:ACTIVE
Ultra-Low Bias Current Difet Operational Amplifier
 
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Product Features and DescriptionFeaturesRequest Free SamplesSamplesTechnical Documents: app notes, user guides, models, and product bulletinsTechnical Documents
Quality: Product Contents, MTBF/FIT Rate and Moisture SensitivityQuality & Pb-Free DataPrice and Packaging InformationPricing/PackagingDownload Application NotesApplication Notes
related productsRelated ProductsInventory, Leadtime, and AvailabilityInventoryModels: BSDL, IBIS, or SPICESimulation Models
Tools & Software: EVMs, CCStudio, and developerTools & Software Download CAD Design ToolsSymbols/FootprintsAccess Reference DesignsReference Designs

 Datasheet
Download Datasheet
Ultra-Low Bias Current Difet® Operational Amplifier (Rev. A) (opa129.pdf, 279 KB)
28 Apr 2007 Download

OPA129
Number of Channels1  
Total Supply Voltage (V)(Min)(+5V=5, +/-5V=10)10  
Total Supply Voltage (V)(Max)(+5V=5, +/-5V=10)36  
Iq per channel(Max)(mA)1.8  
GBW(Typ)(MHz)1  
Slew Rate(Typ)(V/us)2.5  
VIO (25 deg C)(Max)(mV)2  
Offset Drift(Typ)(uV/C)3  
IIB(Max)(pA)0.1  
CMRR(Min)(dB)80  
Vn at 1kHz(Typ)(nV/rtHz)17  
RatingCatalog  
Pin/Package8SOIC  
Operating Temp Range(Celsius)-40 to 125  
Approx. Price (US$) 3.20 | 1ku  
 Samples
 Inventory

Product Information
Back to TopFeatures
  • ULTRA-LOW BIAS CURRENT: 100fA max
  • LOW OFFSET: 2mV max
  • LOW DRIFT: 10µV/°C max
  • HIGH OPEN-LOOP GAIN: 94dB min
  • LOW NOISE: 15nV/Hz at 10kHz
  • PLASTIC DIP and SOIC PACKAGE
  • APPLICATIONS
    • PHOTODETECTOR PREAMP
    • CHROMATOGRAPHY
    • ELECTROMETER AMPLIFIERS
    • MASS SPECTROMETER
    • pH PROBE AMPLIFIER
    • ION GAGE MEASUREMENT

Difet is a registered trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
Back to TopDescription

The OPA129 is an ultra-low bias current monolithic operational amplifier offered in an 8-pin PDIP and SO-8 package. Using advanced geometry dielectrically-isolated FET (Difet®) inputs, this monolithic amplifier achieves a high performance level.

Difet fabrication eliminates isolation-junction leakage current—the main contributor to input bias current with conventional monolithic FETs. This reduces input bias current by a factor of 10 to 100. Very low input bias current can be achieved without resorting to small-geometry FETs or CMOS designs which can suffer from much larger offset voltage, voltage noise, drift, and poor power supply rejection.

The OPA129 special pinout eliminates leakage current that occurs with other op amps. Pins 1 and 4 have no internal connection, allowing circuit board guard traces—even with the surface-mount package version.

OPA129 is available in 8-pin DIP and SO packages, specified for operation from -40°C to +85°C.
Analog eLab(TM) Design Center

Customers Who Evaluated This Product Also Evaluated...

These Alternative Products:

  • OPA2234: Low Power, Precision Single-Su...

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Pricing/Packaging/CAD Design Tools/Samples
Back to TopPricePackagingCAD Design ToolsSamples
DeviceStatusReplaced ByTemp (oC)Budget Price
($US) | QTY		Industry Standard
(TI Pkg) | Pins		Top Side MarkingStandard Pack Quantity | Package CarrierSymbolsFootprintsSamples
OPA129POBSOLETEOPA129U  PDIP (P) | 8 View    Download CAD Format for this FootprintReplaced by OPA129U
OPA129PBOBSOLETEOPA129UB  PDIP (P) | 8 View    Download CAD Format for this FootprintReplaced by OPA129UB
OPA129UACTIVE -40 to 1253.20 | 1kuSOIC (D) | 8 View 100 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintRequest Free Samples
OPA129UBACTIVE -40 to 1255.45 | 1kuSOIC (D) | 8 View 100 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
OPA129UB/2K5ACTIVE -40 to 1255.45 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
OPA129UB/2K5E4ACTIVE -40 to 1255.45 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
OPA129UBE4ACTIVE -40 to 1255.45 | 1kuSOIC (D) | 8 View 100 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
OPA129UBG4ACTIVE -40 to 1255.45 | 1kuSOIC (D) | 8 View 100 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
OPA129UE4ACTIVE -40 to 1253.20 | 1kuSOIC (D) | 8 View 100 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office

* 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
Back to TopTI Inventory StatusReported Distributor Inventory
OPA129UAs of 9:52 AM GMT, 25 Jul 2008As of 9:52 AM GMT, 25 Jul 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0*  Call**AmericasMouser Electronics 696 Buy Now
  Newark 597 Buy Now
  Rochester Electronics >1k Buy Now
OPA129UBE4As of 9:52 AM GMT, 25 Jul 2008As of 9:52 AM GMT, 25 Jul 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0*  26 WeeksNone 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
Back to TopProduct ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
OPA129U RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
OPA129UB RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
OPA129UB/2K5 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
OPA129UB/2K5E4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
OPA129UBE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
OPA129UBG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
OPA129UE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
* 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
Back to TopDatasheets
Ultra-Low Bias Current Difet® Operational Amplifier (Rev. A) (opa129.pdf, 279 KB)
28 Apr 2007 Download
Back to TopApplication Notes
Compensate Transimpedance Amplifiers Intuitively (Rev. A) (sboa055a.htm, 8 KB)
30 Mar 2005 Abstract
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
Designing Photodiode Amplifier Circuits with OPA128 (sboa061.htm, 8 KB)
02 Oct 2000 Abstract
Single-Supply Operation of Operational Amplifiers (sboa059.htm, 8 KB)
02 Oct 2000 Abstract
Diode-Connected FET Protects Op Amps (sboa058.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
Back to TopSimulation Models
Spice Model
OPA129 PSpice Macromodel (sbom038.zip, 3 KB)
25 Oct 2000 zip
OPA129 TINA Macro Model and Test Circuit (sboc181.zip, 23 KB)
29 Aug 2006 zip

Tools & Software
Back to Top Name Part # 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 

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