OPA129 Status: ACTIVE

Ultra-Low Bias Current Difet Operational Amplifier

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Datasheet

Ultra-Low Bias Current Difet® Operational Amplifier (Rev. A) (PDF 448 KB)
28 Apr 2007

	OPA129
Number of Channels	1
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
Rating	Catalog
Pin/Package	8SOIC
Operating Temp Range(Celsius)	-40 to 125
Approx. Price (US$)	3.20 \| 1ku
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

IVC102: Precision Switched Integrator Transimpedance Amplifier
OPA627: Precision High-Speed Difet(R) Operational Amplifiers
OPA124: Low Noise Precision Difet Operational Amplifier
OPA827: Low-Noise, High-Precision, JFET-Input Operational Amplifier

Product Information

Features

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.

Description

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.

Pricing / Packaging / CAD Design Tools / Samples

				Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Replaced By	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
OPA129P	OBSOLETE		OPA129U		PDIP (P) \| 8	View			Replaced by OPA129U
OPA129PB	OBSOLETE		OPA129UB		PDIP (P) \| 8	View			Replaced by OPA129UB
OPA129U	ACTIVE	-40 to 125		3.20 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
OPA129UB	ACTIVE	-40 to 125		6.00 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Contact TI Distributor or Sales Office
OPA129UB/2K5	ACTIVE	-40 to 125		5.45 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
OPA129UB/2K5E4	ACTIVE	-40 to 125		5.45 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
OPA129UBE4	ACTIVE	-40 to 125		6.00 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
OPA129UBG4	ACTIVE	-40 to 125		6.00 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Contact TI Distributor or Sales Office
OPA129UE4	ACTIVE	-40 to 125		3.20 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Contact 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

Reported Distributor Inventory as of 11:39 AM GMT, 06 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 4 WeeksOPA129U
Americas	Arrow	>1k
	Newark	131
	Rochester Electronics	>1k
Asia	WPI	176
Europe	Arrow Southern Europe	75
	Avnet-SILICA	10
	Compel	>1k
	Spoerle	233
Worldwide	DigiKey	>1k
TI Lead Time*: 1 WeekOPA129UB
Americas	Arrow	>1k
Americas	Newark	10
Asia	WPI	49
Europe	Arrow Southern Europe	75
	Avnet-SILICA	65
	Compel	>1k
	Spoerle	64
Worldwide	DigiKey	925
Worldwide	Mouser Electronics	16
TI Lead Time*: 20 WeeksOPA129UB/2K5
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksOPA129UB/2K5E4
Worldwide	DigiKey	Available
TI Lead Time*: 1 WeekOPA129UBE4
Europe	EBV Elektronik	34
Worldwide	DigiKey	Available
TI Lead Time*: 1 WeekOPA129UBG4
Europe	EBV Elektronik	75
Worldwide	DigiKey	Available
TI Lead Time*: 4 WeeksOPA129UE4
Asia	Farnell Asia	>1k
Europe	Arrow Northern Europe	48
Europe	Farnell	>1k
Worldwide	DigiKey	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 Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
OPA129U	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
OPA129UB	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
OPA129UB/2K5	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
OPA129UB/2K5E4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
OPA129UBE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
OPA129UBG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
OPA129UE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View

* 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 OPA129

Datasheet

Ultra-Low Bias Current Difet® Operational Amplifier (Rev. A) (PDF, 448 KB)
28 Apr 2007

Application Notes

Thermal and Electrical Properties of Selected Packaging Materials (HTM, 8 KB) 15663 views
04 Oct 2000 Read Abstract
Compensate Transimpedance Amplifiers Intuitively (Rev. A) (HTM, 8 KB) 4747 views
30 Mar 2005 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 26941 views
24 May 2004 Read Abstract
Tuning in Amplifiers (HTM, 8 KB) 8873 views
02 Oct 2000 Read Abstract
Designing Photodiode Amplifier Circuits with OPA128 (HTM, 8 KB) 5645 views
02 Oct 2000 Read Abstract
Diode-Connected FET Protects Op Amps (HTM, 8 KB) 1901 views
02 Oct 2000 Read Abstract
Single-Supply Operation of Operational Amplifiers (HTM, 8 KB) 10623 views
02 Oct 2000 Read Abstract
Op Amp Performance Analysis (HTM, 8 KB) 7658 views
02 Oct 2000 Read Abstract
High Speed Data Conversion (HTM, 8 KB) 22174 views
02 Oct 2000 Read Abstract

Tools & Software

Name	Part #	Company	Tool / Software Type
Analog Filter Design	FILTER-DESIGNER	Texas Instruments	Analysis Software
Automatic Resistor/Capacitor Calculator for Passive Filters	RC-FILTER-CALC	Texas Instruments	Calculation Utilities
Decibel Calculator	DECIBEL-CALC	Texas Instruments	Calculation Utilities
Frequency/Wavelength Calculator	FREQ-WAVE-CALC	Texas Instruments	Calculation Utilities
Noise Calculator, Generator and Examples	OPAMP-NOISECALC	Texas Instruments	Calculation Utilities
Op Amp Gain Stage Calculator	GAIN-STAGE-CALC	Texas Instruments	Calculation Utilities
Resistor Calculator for Op Amp Gain and Zero Shift	RESISTOR-CALC	Texas Instruments	Calculation Utilities
Universal EVM for Single/Dual OpAmps without Shutdown in MSOP/SOIC/SOT-23 Packages	OPAMPEVM-SOT23	Texas Instruments	Development Boards/EVMs
SPICE-Based Analog Simulation Program	TINA-TI	Texas Instruments	Simulators
MDACBufferPro(TM) Output Buffer Amplifier Selection Tool	MDACBUFFERPRO	Texas Instruments	Application Software
Active Filter Design Application	FILTERPRO	Texas Instruments	Application Software

Simulation Models

PSpice Model
- OPA129 PSpice Model (ZIP, 3 KB) 574 views
  25 Oct 2000
TINA-TI Spice Model
- OPA129 TINA-TI Spice Model (TSM, 4 KB) 51 views
  24 Jan 2009
TINA-TI Reference Design
- OPA129 TINA-TI Reference Design (Rev. A) (TSC, 103 KB) 303 views
  24 Jan 2009

Customers Who Evaluated This Product Also Evaluated...
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OPA627	Precision High-Speed Difet(R) Operational Amplifiers	PRECISION AMPLIFIER-LOW OFFSET VOLTAGE	TI customers also evaluated this product.
OPA124	Low Noise Precision Difet Operational Amplifier	PRECISION AMPLIFIER-LOW OFFSET VOLTAGE	TI customers also evaluated this product.
OPA827	Low-Noise, High-Precision, JFET-Input Operational Amplifier	PRECISION AMPLIFIER-LOW NOISE	TI customers also evaluated this product.
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OPA129 Status: ACTIVE

Ultra-Low Bias Current Difet Operational Amplifier

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