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Home > Products > Integrated Circuits (ICs) > Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps > OPA129U
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OPA129U

In Stock 4477 pcs Reference Price(In US Dollars)
1+
$0.00
Manufacturer Part Number:
OPA129U
Manufacturer / Brand
Texas Instruments
Part of Description:
IC OPAMP GP 1 CIRCUIT 8SOIC
Datasheets:
OPA129U(1).pdfOPA129U(2).pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 4477 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number OPA129U
Manufacturer / Brand Texas Instruments
Stock Quantity 4477 pcs Stock
Category Integrated Circuits (ICs) > Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Description IC OPAMP GP 1 CIRCUIT 8SOIC
Lead Free Status / RoHS Status: ROHS3 Compliant
RFQ OPA129U Datasheets OPA129U Details PDF
OPA129U Details PDF for KR.pdf
OPA129U Details PDF for IT.pdf
OPA129U Details PDF for ES.pdf
OPA129U Details PDF for DE.pdf
OPA129U Details PDF for FR.pdf
Voltage - Supply Span (Min) 10 V
Voltage - Supply Span (Max) 36 V
Voltage - Input Offset 1 mV
Supplier Device Package 8-SOIC
Slew Rate 2.5V/µs
Series Difet®
Package / Case 8-SOIC (0.154", 3.90mm Width)
Package Tube
Output Type -
Operating Temperature -40°C ~ 85°C
Number of Circuits 1
Mounting Type Surface Mount
Gain Bandwidth Product 1 MHz
Current - Supply 1.2mA
Current - Output / Channel 10 mA
Current - Input Bias 0.03 pA
Base Product Number OPA129
Amplifier Type General Purpose

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OPA129U Product Details:

The OPA129U is a high-performance, general-purpose operational amplifier (op-amp) manufactured by Luminary Micro/Texas Instruments. It belongs to the Difet series of op-amps, known for their exceptional input characteristics and wide operating voltage range.

Key features of the OPA129U include a wide supply voltage range of 10V to 36V (single-supply) or ±5V to ±18V (dual-supply), low input bias current of just 0.03pA, and a slew rate of 2.5V/s. These specifications make the OPA129U well-suited for a variety of instrumentation and buffer amplifier applications that require high accuracy, low noise, and wide dynamic range.

Designed in a compact 8-SOIC (Small Outline Integrated Circuit) package, the OPA129U is a surface-mount device that occupies a small footprint on the circuit board. It is RoHS-compliant, ensuring compatibility with lead-free manufacturing processes.

The OPA129U's primary advantages include its exceptional input characteristics, low power consumption (1.2mA supply current), and wide operating temperature range of -40°C to 85°C, making it suitable for use in a variety of environments and applications.

Typical application areas for the OPA129U include precision measurement and instrumentation, data acquisition systems, buffer amplifiers, and various types of signal conditioning circuits. Its high input impedance and low input bias current make it well-suited for applications where minimizing loading effects is crucial.

Equivalent or alternative models to the OPA129U include the OPA128, OPA129, and OPA2129 op-amps from Texas Instruments, which share similar performance characteristics and are compatible with the OPA129U in many applications.

OPA129U Image
OPA129U (1)

OPA129U Key Technical Attributes

General Purpose Amplifier, Single Circuit, Surface Mount

OPA129U Packing Size

Type: Tube, 8-SOIC Package, SOP-8 Encapsulation, Size: 0.154", 3.90mm Width

OPA129U Application

Designed for general amplification tasks in various electronic circuits

OPA129U Features

The OPA129U amplifier from Luminary Micro / Texas Instruments is geared for diverse applications in the electronics sector. Tailored for precision tasks, this amplifier operates efficiently within a temperature range of -40°C to 85°C, ensuring reliability in varying environmental conditions. With a Voltage Supply range of 10 V to 36 V or ±5 V to ±18 V and a modest Slew Rate of 2.5 V/s, it provides stable performance. The Gain Bandwidth Product is 1MHz, which indicates the frequency at which the amplifier can effectively perform, making it suitable for low-frequency applications. Moreover, the exceptionally low Current - Input Bias of 0.03pA minimizes errors due to bias current in precision circuits.

OPA129U Image
OPA129U (2)

OPA129U Quality and Safety Features

The device is RoHS compliant, adhering to the latest environmental standards for electronic components. It also has a Moisture Sensitivity Level (MSL) of 3, requiring careful handling and storage to prevent moisture-related damage.

OPA129U Compatibility

This unit’s general-purpose nature makes it adaptable to a variety of electronic applications and it is compatible with other components that fit the voltage and current specifications.

OPA129U Datasheet PDF

We provide the most authoritative and detailed datasheet for OPA129U on our website. For comprehensive technical information and specifications, we highly recommend downloading the datasheet from the current product page to ensure accurate data for your project needs.

Quality Distributor

IC-Components is a premier distributor of Luminary Micro / Texas Instruments products. Recognized for our commitment to quality and customer service, we are your trusted source when purchasing components like the OPA129U amplifier. Visit our website for a competitive quote and to benefit from our expert service and reliable product delivery.

Frequently Asked Questions

What are the key considerations for replacing an older OPA129 with the OPA129U, especially regarding input bias current and input offset voltage drift in sensitive instrumentation?
When replacing an older OPA129 with the OPA129U, the primary benefit is the "U" designation often implies improved specifications or newer manufacturing processes. Specifically, pay close attention to the input bias current, which is extremely low at 0.03pA for the OPA129U, making it suitable for high-impedance signal sources where leakage current is critical. Similarly, while not explicitly stated as a differentiator, the OPA129U should maintain or improve upon the offset voltage drift of the base OPA129 series, which is crucial for long-term stability in precision measurement applications. Always verify the datasheet for the exact part you are replacing and the OPA129U to confirm any specific improvements.
How does the low 0.03pA input bias current of the OPA129U impact the selection of feedback resistors and source impedances in a transimpedance amplifier design for high-ohm sensors?
The exceptionally low 0.03pA input bias current of the OPA129U is a significant advantage for transimpedance amplifier (TIA) designs with high-ohm sensors. This low bias current minimizes the voltage drop across the feedback resistor caused by the amplifier's input current, thereby reducing measurement error. You can utilize much larger feedback resistor values (e.g., tens or hundreds of megaohms) to achieve higher gain for small sensor currents, without being significantly limited by bias current induced offsets. However, ensure that the parasitic capacitance of these large resistors and the amplifier's input capacitance (which can be influenced by the specific OPA129U packaging, 8-SOIC in this case) are accounted for, as they will affect the TIA's bandwidth.
What are the potential design challenges or limitations when using the OPA129U in applications requiring a very fast slew rate, given its 2.5 V/µs specification?
The OPA129U has a modest slew rate of 2.5 V/µs. This limits its suitability for applications involving rapid signal transitions or high-frequency square wave amplification. If your application requires faster response times, such as in high-speed data acquisition or fast pulse generation, the OPA129U may not be the optimal choice. Consider alternative amplifiers with significantly higher slew rates (e.g., >10 V/µs) if your signal dynamics demand it. However, for many general-purpose instrumentation and audio applications where bandwidth is the primary concern (1MHz Gain Bandwidth Product), the slew rate may be sufficient.
Can the OPA129U be reliably operated in industrial environments with temperature fluctuations between -40°C and 85°C, and what are the implications for its offset voltage and bias current?
Yes, the OPA129U is rated for an operating temperature range of -40°C to 85°C, making it suitable for many industrial applications. While the datasheet provides typical values, it's crucial to consider the specified drift characteristics for input offset voltage and bias current over this temperature range. For critical applications, consult the datasheet's graphs illustrating these parameters versus temperature to estimate the maximum potential variation. If extreme precision is required across the entire industrial temperature range, you might need to implement calibration routines or select parts with tighter temperature coefficients, though the OPA129U's low bias current itself is a strong indicator of good thermal stability.
When migrating a design from another instrumentation amplifier to the OPA129U, what specific pinout compatibility and power supply requirements should be checked for the 8-SOIC package?
Migrating to the OPA129U in its 8-SOIC package requires careful checking of pinout compatibility with your existing design. While the 8-SOIC package is common, the internal functional pin assignments for an instrumentation amplifier can vary significantly between different part numbers. Always compare the pinout diagram of the OPA129U to your current amplifier. Additionally, verify the power supply voltage range: the OPA129U supports single or dual supplies from ±5V to ±18V or 10V to 36V. Ensure your existing power supply rails are within these limits, or plan for necessary modifications.
For a high-precision analog front-end designed around a legacy amplifier, what are the practical differences and potential design implications of switching to the OPA129U for improved input bias current performance?
Switching to the OPA129U for its superior input bias current (0.03pA) in a high-precision analog front-end typically offers significant benefits in reducing offset errors, especially when interfacing with high-impedance sensors or sources. The practical difference is a cleaner signal with fewer artifacts from leakage currents. Design implications include potentially allowing for the use of higher-value feedback resistors to increase gain, leading to better resolution for low-level signals. However, you must re-evaluate the amplifier's bandwidth limitations imposed by the increased RC time constants of larger feedback networks and parasitic capacitances associated with the OPA129U in its 8-SOIC package.
In scenarios where the OPA129U's 1MHz Gain Bandwidth Product is insufficient, what are common workarounds or alternative IC families to consider for applications requiring higher signal frequencies?
If the OPA129U's 1MHz Gain Bandwidth Product (GBW) is a limitation for your application's signal frequencies, you'll need to look at amplifiers with a higher GBW. Common workarounds depend on the specific application. For instance, you might consider a two-stage amplifier design where a higher-speed amplifier precedes the OPA129U for signal conditioning. Alternatively, you would need to explore entirely different amplifier families. Look for "high-speed operational amplifiers" or "wideband amplifiers" from manufacturers like Analog Devices, Texas Instruments, or Maxim Integrated, often characterized by GBW figures in the tens or hundreds of MHz, or even GHz range. Ensure that any replacement also meets your other critical parameters like input bias current and noise.
What are the considerations for handling and storage of the OPA129U in its 8-SOIC package, particularly concerning its Moisture Sensitivity Level (MSL 3)?
The OPA129U, being MSL 3 (168 Hours), requires careful handling and storage to prevent premature degradation of its solderability due to moisture absorption. After opening the manufacturer's packaging (Tube for the OPA129U), it should ideally be used within 168 hours or kept in a dry, controlled environment. If exposed to ambient humidity for extended periods, it may require baking before reflow soldering to prevent issues like delamination or poor solder joint formation. Always follow IPC/JEDEC standards for MSL handling and ensure proper storage conditions.
How does the relatively low output current capability of the OPA129U (10mA per channel) affect its suitability for driving capacitive loads or low-impedance loads in system designs?
The OPA129U's output current capability of 10mA per channel is adequate for many signal processing tasks and driving moderately high-impedance loads. However, if your design requires driving significant capacitive loads (e.g., long cables, filter capacitors) or low-impedance loads directly (e.g., certain sensors, small speakers), this 10mA limit could lead to performance issues like reduced slew rate, distortion, or even instability. For such applications, you would need to consider using a buffer amplifier or a dedicated line driver with higher current drive capabilities in conjunction with the OPA129U, or select a different op-amp that offers higher output current.
When evaluating the OPA129U for a new design, what trade-offs exist compared to other popular general-purpose op-amps with similar gain bandwidth products but potentially higher slew rates or different input characteristics?
When evaluating the OPA129U against other general-purpose op-amps with a similar 1MHz GBW, the primary trade-off lies in its exceptionally low input bias current (0.03pA) and extremely low input offset voltage (1mV typical). If your application heavily relies on interfacing with high-impedance sources or demands minimal current leakage, the OPA129U is a strong contender. However, if higher slew rate (e.g., 2.5V/µs for OPA129U) or higher output current drive is a priority, you might need to consider alternatives. For instance, an op-amp with a 1MHz GBW but a 10V/µs slew rate would be better suited for fast transients, but likely would have a significantly higher input bias current. Always balance the OPA129U's strengths in precision analog input with the specific dynamic and driving requirements of your system.

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OPA129U

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IC OPAMP GP 1 CIRCUIT 8SOIC

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