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HomeProductsIntegrated Circuits (ICs)Linear - Amplifiers - Instrumentation, OP Amps, Buffer AmpsOPA2244UA/2K5
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OPA2244UA/2K5 - Texas Instruments

Manufacturer Part Number
OPA2244UA/2K5
Manufacturer
Texas Instruments
Allelco Part Number
32D-OPA2244UA/2K5
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
29,195 pcs available, New & Original
Parts Description
IC OPAMP GP 2 CIRCUIT 8SOIC
Package
8-SOIC
Data sheet
-
RoHs Status
ROHS3 Compliant
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Specifications

OPA2244UA/2K5 Tech Specifications
Texas Instruments - OPA2244UA/2K5 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - OPA2244UA/2K5

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply Span (Min) 2.2 V
Voltage - Supply Span (Max) 36 V
Voltage - Input Offset 700 µV
Supplier Device Package 8-SOIC
Slew Rate 0.1V/µs
Series MicroAmplifier™
Package / Case 8-SOIC (0.154", 3.90mm Width)
Package Tape & Reel (TR)
Output Type -
Product Attribute Attribute Value
Operating Temperature -40°C ~ 85°C
Number of Circuits 2
Mounting Type Surface Mount
Gain Bandwidth Product 430 kHz
Current - Supply 40µA (x2 Channels)
Current - Output / Channel 25 mA
Current - Input Bias 10 nA
Base Product Number OPA2244
Amplifier Type General Purpose

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99

Parts Introduction

OPA2244UA/2K5 Image
OPA2244UA/2K5 (1)

Manufacturer Part Number

OPA2244UA/2K5

Manufacturer

Texas Instruments

Introduction

This is a dual operational amplifier (op-amp) integrated circuit (IC) from Texas Instruments. It is part of the MicroAmplifier series and offers general-purpose amplification capabilities.

Product Features and Performance

Dual op-amp configuration with two independent op-amp channels

Wide supply voltage range from 2.2V to 36V

High gain-bandwidth product of 430kHz

Low input offset voltage of 700μV

Low input bias current of 10nA

High output current drive of 25mA per channel

Slew rate of 0.1V/μs

Wide operating temperature range of -40°C to 85°C

Product Advantages

Versatile general-purpose amplifier suitable for a wide range of applications

Compact 8-SOIC surface mount package

ROHS3 compliant for environmental compatibility

Tape and reel packaging for efficient manufacturing and assembly

Key Technical Parameters

Package: 8-SOIC (0.154", 3.90mm Width)

Mounting Type: Surface Mount

Number of Circuits: 2

Gain Bandwidth Product: 430kHz

Supply Voltage Range: 2.2V to 36V

Supply Current: 40μA per channel

Slew Rate: 0.1V/μs

Input Offset Voltage: 700μV

Input Bias Current: 10nA

Output Current: 25mA per channel

Quality and Safety Features

ROHS3 compliant for environmental responsibility

Wide operating temperature range for reliability in diverse environments

Compatibility

This op-amp IC is compatible with a wide range of electronic circuits and systems that require general-purpose amplification, such as:

Signal conditioning and processing

Instrumentation and measurement applications

Buffer amplifiers

Audio and video circuits

Application Areas

Industrial and commercial electronics

Test and measurement equipment

Medical devices

Consumer electronics

Product Lifecycle

The OPA2244UA/2K5 is an active and available product from Texas Instruments. There are no indications of it being near discontinuation, and replacement or upgrade options are likely available from the manufacturer.

Key Reasons to Choose This Product

Versatile general-purpose amplification capabilities

Wide supply voltage range and excellent performance specifications

Compact and efficient 8-SOIC surface mount package

ROHS3 compliance for environmental responsibility

Reliable operation across a wide temperature range

Compatibility with a broad range of electronic applications

Frequently Asked Questions(FAQ)

How does the OPA2244UA/2K5 perform in low-voltage battery-powered applications compared to rail-to-rail output op amps, and what design considerations apply when operating near its 2.2 V minimum supply?
The OPA2244UA/2K5 operates from a minimum of 2.2 V, making it suitable for low-voltage applications such as coin-cell powered devices or single-supply systems below 3 V. Unlike rail-to-rail output amplifiers, this device does not guarantee full output swing to the negative rail at low supply voltages. At 2.2 V, the output may be limited by internal stage headroom, potentially reducing signal fidelity in precision analog stages. Designers should verify output swing specifications under actual supply conditions using the datasheet’s transfer curves and allow sufficient overdrive margin for dynamic signals. Its low quiescent current of 40 µA per channel supports extended battery life, but performance trade-offs in output range must be evaluated against application requirements.
What are the implications of the OPA2244UA/2K5’s 700 µV input offset voltage for high-gain sensor interface circuits, and how can this affect system calibration?
With an input offset voltage of 700 µV, the OPA2244UA/2K5 introduces a fixed error that scales with closed-loop gain. In a non-inverting amplifier with a gain of 100, this translates to a 70 mV output error—significant for low-level sensor signals like thermocouples or strain gauges. This offset is not adjustable without external trimming and contributes directly to measurement uncertainty. For applications requiring sub-millivolt accuracy, external nulling pins (if available) or post-calibration routines are necessary. The device lacks automatic offset correction, so designers must either tolerate the offset or implement compensation techniques early in the signal chain.
Can the OPA2244UA/2K5 drive capacitive loads above 100 nF without additional buffering, and what stability issues might arise in unity-gain configurations?
The OPA2244UA/2K5 exhibits limited phase margin when driving heavy capacitive loads in unity-gain configuration. While the datasheet specifies stability up to 15 pF, real-world performance degrades rapidly beyond this, especially with load capacitances exceeding 100 nF. Driving such loads without series isolation resistors or output buffers can lead to oscillations due to reduced loop stability. For feedback paths connected to long cables or high-impedance nodes, adding a small series resistor (e.g., 10–100 Ω) between the output and capacitor improves damping. Designers should test transient response with worst-case capacitive loading during prototype validation.
How does the gain bandwidth product of 430 kHz in the OPA2244UA/2K5 compare to other general-purpose dual op amps like the LM2904DT, particularly in active filter designs?
The OPA2244UA/2K5 offers a gain bandwidth product (GBW) of 430 kHz, which is approximately three times higher than the LM2904DT’s 140 kHz GBW. This enables higher-frequency operation in active filters—such as second-order low-pass sections with cutoff frequencies above 100 kHz—without sacrificing roll-off characteristics. However, unlike precision op amps, the OPA2244 does not support rail-to-rail inputs, limiting input range in single-supply systems. When comparing to the LT1078IS8#PBF, which has similar bandwidth but lower power consumption, the OPA2244 trades efficiency for speed and bias current. Selection depends on whether bandwidth or quiescent current dominates system constraints.
Is the OPA2244UA/2K5 suitable for use in automotive temperature sensing circuits operating across -40°C to +85°C, and what reliability concerns exist regarding input bias current drift?
Yes, the OPA2244UA/2K5 is qualified over an industrial temperature range of -40°C to +85°C, making it appropriate for automotive edge sensing applications. However, its input bias current of 10 nA is relatively high compared to FET-input types, and it may exhibit slight variation with temperature. In high-impedance sensor interfaces like RTDs or thermistors, even small changes in bias current can induce voltage drops across source impedance, affecting accuracy. To mitigate this, designers should use low-leakage PCB materials and consider guard rings or shielding. The device’s moderate offset voltage stability ensures consistent performance across temperature, provided layout minimizes thermal gradients.
What are the advantages of using the MicroAmplifier™ series OPA2244UA/2K5 over discrete transistor-based amplifier stages in compact instrumentation?
The OPA2244UA/2K5 integrates two matched general-purpose amplifiers in a single 8-SOIC package, reducing board space and parasitic effects compared to discrete implementations. Its 40 µA total quiescent current per channel enables low-power portable designs, while the 25 mA output drive capability supports moderate fan-out without external buffering. Discrete solutions typically require multiple transistors, biasing networks, and compensation components, increasing complexity and sensitivity to layout. The integrated design also ensures better matching between channels in differential applications like bridge sensors. Although discrete stages offer flexibility in gain and bandwidth, the OPA2244UA/2K5 provides predictable, repeatable performance with minimal external components.
Why might a designer choose the OPA2244UA/2K5 instead of the OP213FPZ despite the latter’s lower input offset voltage?
While the OP213FPZ offers superior input offset voltage (typically 100 µV vs. OPA2244UA/2K5’s 700 µV), it lacks dual-channel integration and operates at higher supply currents (~1.2 mA per channel). The OPA2244UA/2K5 sacrifices some precision for lower power and space efficiency, making it preferable in battery-powered or thermally constrained systems where total energy budget matters more than absolute DC accuracy. Additionally, the OPA2244’s higher GBW (430 kHz vs. ~1 MHz nominal for OP213) allows faster settling in dynamic signals. If the application tolerates moderate offset and benefits from dual amplification in a small footprint, the OPA2244UA/2K5 presents a compelling balance of cost, size, and power.
How does the slew rate of 0.1 V/µs in the OPA2244UA/2K5 limit its utility in audio or transient-response-critical applications?
A slew rate of 0.1 V/µs restricts the OPA2244UA/2K5’s ability to handle large-amplitude fast-changing signals. For example, a 5 V peak sine wave at 32 kHz requires a minimum slew rate of 2π×32k×5 ≈ 1 V/µs to avoid distortion—far exceeding the device’s capability. Even square waves above a few hundred hertz will exhibit ringing or slow edges. Consequently, the OPA2244 is unsuitable for audio preamplification or high-speed data acquisition front ends. It performs adequately in slowly varying control loops or sensor buffering where signal dynamics are modest. Designers should verify worst-case transient response using time-domain simulations before deployment.
What precautions should be taken when substituting the OPA2244UA/2K5 with alternatives like the LM258ADT in existing designs?
Substituting the OPA2244UA/2K5 with the LM258ADT requires careful evaluation due to differences in input common-mode range, supply voltage tolerance, and output stage behavior. The LM258ADT supports wider supply voltages (up to ±15 V dual or 30 V single) and has a higher output current (40 mA), but its input range excludes voltages near the negative rail, unlike the OPA2244’s broader compatibility down to 2.2 V. Additionally, the LM258 consumes more power (typically 500 µA per channel) and has lower GBW (~1 MHz), which may affect frequency response. Layout parasitics and feedback topology must also be reassessed to prevent instability introduced by the different open-loop characteristics.
Does the OPA2244UA/2K5 require external compensation when used in high-gain transimpedance configurations with photodiodes?
No, the OPA2244UA/2K5 is internally compensated for unity-gain stability and remains stable in most transimpedance amplifier (TIA) topologies. However, high closed-loop gains combined with large feedback resistors (>1 MΩ) and significant photodiode capacitance can push the phase margin below acceptable levels. While the device can oscillate under these conditions, proper layout—short traces, ground plane, and minimizing stray capacitance—is essential. External compensation capacitors across the feedback resistor are rarely needed but may be added if peaking or ringing is observed during testing. Always validate stability with actual light levels and circuit parasitics.
How does the moisture sensitivity level (MSL 3) of the OPA2244UA/2K5 impact manufacturing processes, and what storage conditions are recommended?
As an MSL 3 component, the OPA2244UA/2K5 absorbs moisture over time and must undergo reflow soldering within 168 hours of exposure unless stored in dry packaging. After opening the original moisture barrier bag, the device should be placed in a desiccator or sealed container with humidity indicator cards and desiccant. If the shelf life exceeds 168 hours, a dry bake at 125°C for up to 24 hours may be required before reflow. Failure to manage moisture can result in popcorning and internal delamination during thermal cycling. Compliance with JEDEC J-STD-033 guidelines is critical for reliable production yield.
What role does the base product number OPA2244 play in inventory management and obsolescence planning for designs using the OPA2244UA/2K5?
The base product number OPA2244 identifies all variants of this amplifier family, including different packages, temperature grades, and performance grades. Using the OPA2244UA/2K5 in a design implies commitment to the entire family’s electrical characteristics, which simplifies long-term sourcing. However, Texas Instruments may discontinue specific suffixes like /2K5 while maintaining the base part. Designers should monitor TI’s lifecycle status for the OPA2244 base and evaluate substitutes like the LM2904DT only after verifying functional equivalence. Maintaining design flexibility through pin-compatible alternatives and avoiding hard dependencies on package-specific markings aids future migration.
Can the OPA2244UA/2K5 be used in single-supply, 3 V battery-operated medical monitoring equipment, and what limitations apply to input signal range?
Yes, the OPA2244UA/2K5 supports single-supply operation down to 2.2 V, making it viable for 3 V medical monitors such as pulse oximeter signal conditioning. However, its input common-mode range typically extends only to one diode drop above the negative rail. At 2.2 V supply, inputs cannot go below approximately 0.7 V, limiting compatibility with unipolar sensors that span ground. Signal conditioning prior to amplification—such as AC coupling or level shifting—may be necessary. Additionally, the 700 µV offset must be calibrated out in precision measurements like ECG or blood pressure tracking. Power efficiency and integration outweigh minor input limitations in many wearable health devices.
Why might the OPA2244UA/2K5 be preferred over the LT1208CN8#PBF in cost-sensitive industrial automation designs?
The LT1208CN8#PBF offers higher precision and lower noise but operates at significantly higher power (~1.5 mA per channel) and lacks dual-channel integration. In contrast, the OPA2244UA/2K5 consumes only 40 µA per channel and fits both amplifiers into one 8-pin SOIC, reducing bill-of-materials cost and PCB area. Industrial automation often prioritizes reliability and simplicity over ultralow offset; the OPA2244’s robust output stage and wide supply range suit relay drivers or sensor interfaces where moderate accuracy suffices. The LT1208 would be overkill unless sub-µV resolution is mandated, justifying its higher price and power draw.
How does the cut tape and Digi-Reel packaging of the OPA2244UA/2K5 affect automated assembly, and what handling procedures differ from tube or tray formats?
The cut tape format facilitates pick-and-place machine feeding by presenting leads in sequential order, improving throughput in high-volume SMT lines. Digi-Reel® packaging offers automated reeling with precise length control, minimizing waste during staging. Both formats require careful handling to avoid contamination or lead damage before placement. Unlike tubes, they lack individual static protection, so ESD grounding remains critical during unpacking. Inventory tracking is easier due to continuous tape labeling, but storage must prevent abrasion or moisture ingress. Manufacturers should follow IPC-7351 guidelines for footprint definition and ensure feeders are calibrated for 3 mm pitch SOIC geometries.
What design trade-offs emerge when selecting the OPA2244UA/2K5 for a high-impedance piezoelectric sensor interface versus a current-output transducer driver?
For piezoelectric sensors, the OPA2244UA/2K5’s 10 nA input bias current creates a voltage drop across the sensor’s high source impedance, distorting small charge signals. A FET-input op amp would be preferable here. Conversely, driving current-output transducers benefits from the OPA2244’s 25 mA output capability and low output resistance. The choice hinges on signal type: voltage-sensitive, high-Z sources suffer from leakage, while current-driven loads gain robustness. In hybrid systems, a front-end buffer with lower bias current followed by the OPA2244 for gain stages may optimize both domains. Each application demands distinct optimization strategies within the same amplifier architecture.
How does RoHS3 compliance and REACH unaffected status influence global regulatory acceptance of the OPA2244UA/2K5 in EU and North American markets?
RoHS3 compliance ensures the OPA2244UA/2K5 meets European restrictions on hazardous substances like lead, mercury, and cadmium, facilitating CE marking. The REACH unaffected declaration indicates no SVHCs (substances of very high concern) are intentionally added at reportable concentrations, simplifying SCIP database notifications required for waste electronics reporting in the EU. These statuses reduce legal risk during importation and end-of-life disposal. While not affecting electrical performance, they are mandatory for commercial distribution in regulated jurisdictions. Designers specifying this part implicitly confirm supply chain traceability, supporting sustainability goals and audit readiness.
What factors determine whether the OPA2244UA/2K5 is a suitable replacement for legacy designs using the LT1078IS8#PBF in voltage reference buffering circuits?
The LT1078IS8#PBF is a precision voltage reference with extremely low drift, whereas the OPA2244UA/2K5 is a general-purpose amplifier with 700 µV offset and moderate drift. Direct substitution is inappropriate unless the reference output is buffered with gain >10 and post-calibrated. The OPA2244 can serve as a low-cost buffer for less stringent references where absolute accuracy is secondary to stability and drive capability. Key differences include supply range, bias current, and noise—factors that dictate suitability. Migration should involve functional testing under worst-case temperature and load conditions to confirm signal integrity meets system thresholds.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments OPA2244UA/2K5

Product Attribute OPA2244UA/2K5G4 OPA2244EA/2K5 OPA2244EA/2K5G4 OPA2244EA/250
Part Number OPA2244UA/2K5G4 OPA2244EA/2K5 OPA2244EA/2K5G4 OPA2244EA/250
Manufacturer Luminary Micro / Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Voltage - Input Offset - - - -
Current - Supply - - - -
Current - Input Bias - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Amplifier Type - - - -
Number of Circuits - - - -
Series - - - -
Gain Bandwidth Product - - - -
Current - Output / Channel - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Voltage - Supply Span (Max) - - - -
Slew Rate - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Base Product Number - DAC34H84 MAX500 ADS62P42
Mounting Type - Surface Mount Through Hole Surface Mount
Voltage - Supply Span (Min) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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OPA2244UA/2K5 Image

OPA2244UA/2K5

Texas Instruments
32D-OPA2244UA/2K5

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