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HomeProductsIntegrated Circuits (ICs)Specialized ICsOPA656UB/2K5
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OPA656UB/2K5 - Texas Instruments

Manufacturer Part Number
OPA656UB/2K5
Manufacturer
Texas Instruments
Allelco Part Number
41D-OPA656UB/2K5
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
17,670 pcs available, New & Original
Parts Description
SOIC-8
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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Our certification
In stock: 17670
  • Unit Price: $6.009
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $6.009 $6.01
10+ $5.272 $52.72
30+ $4.822 $144.66
100+ $4.445 $444.50
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

OPA656UB/2K5 Tech Specifications
Texas Instruments - OPA656UB/2K5 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - OPA656UB/2K5

Product Attribute Attribute Value
Part Number OPA656UB/2K5
Package SOIC-8
Description SOIC-8
Stock Condition Get 17670 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer Texas Instruments
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

What are the key performance trade-offs when selecting the OPA656UB/2K5 for high-speed analog signal conditioning in precision instrumentation applications?
The OPA656UB/2K5 offers exceptional bandwidth (500 MHz -3dB) and slew rate (295 V/µs), making it suitable for demanding signal chains, but its input bias current of 1 pA and offset voltage of 250 µV must be evaluated against system noise floors and gain stages. While these specifications support high-precision operation, designers should consider how the 14mA supply current impacts thermal management and power budgets in battery-powered or thermally constrained environments.
How does the OPA656UB/2K5 compare to other voltage feedback amplifiers like the THS4304 or LMH6702 in terms of settling time and distortion for high-frequency data acquisition systems?
Unlike current-feedback amplifiers such as the THS4304, the OPA656UB/2K5 provides superior DC precision due to its low input offset and bias current, which is advantageous in measurement front-ends. However, compared to the LMH6702, it trades slightly higher distortion at very high frequencies for better linearity and phase response stability. In ADC driver applications requiring fast settling under large signal swings, the OPA656UB/2K5 typically achieves sub-nanosecond settling times only when carefully compensated; otherwise, its open-loop gain roll-off can introduce peaking in the transient response.
What layout considerations are critical when implementing the OPA656UB/2K5 in a high-gain, single-supply design operating from a 12V rail?
Given the OPA656UB/2K5’s wide supply range (8–12 V) and high slew rate, parasitic inductance and capacitance in the power delivery network can induce instability or oscillation, especially at gains above 10. A ground plane with short, low-impedance paths to both supply rails, along with decoupling capacitors placed within 2 mm of the device pins, is essential. Additionally, feedback components should be positioned close to the amplifier to minimize trace length and avoid unintended feedback loops.
Can the OPA656UB/2K5 be used reliably in industrial temperature environments (-40°C to 85°C) without derating its gain bandwidth product or slew rate?
Yes, the OPA656UB/2K5 is specified over an industrial temperature range (-40°C to 85°C), and its key dynamic parameters—such as gain bandwidth (230 MHz) and slew rate (295 V/µs)—are guaranteed across this interval. However, long-term reliability depends on proper thermal design; junction temperatures exceeding 125°C may accelerate aging effects even if the ambient temperature remains within specification.
What impact does the OPA656UB/2K5’s input-referred noise have on low-level signal amplification in wideband sensor interfaces?
The OPA656UB/2K5 exhibits typical input voltage noise densities around 4.2 nV/√Hz at 1 kHz, which combined with its low current noise (0.9 fA/√Hz), makes it suitable for amplifying microvolt-level signals in bandwidths up to several hundred megahertz. For a gain of 20, this results in an output noise floor of approximately 84 nV/√Hz, limiting useful resolution unless filtering or averaging techniques are employed.
Is it feasible to operate the OPA656UB/2K5 near its supply rails in a high-output swing application without significant distortion?
The OPA656UB/2K5 supports output swings within 2 V of each supply rail when driving moderate loads, allowing full utilization of its 8–12 V supply span. However, achieving maximum undistorted peak-to-peak output requires careful load impedance matching and headroom planning. At full amplitude, nonlinearities increase rapidly beyond 1–2 V from rails, necessitating margining in high-dynamic-range designs.
How does the OPA656UB/2K5 perform in unity-gain buffer configurations compared to higher-gain modes?
In unity-gain buffering, the OPA656UB/2K5 maintains excellent stability thanks to its internal compensation, though phase margin degrades near 500 MHz due to capacitive loading. This can lead to ringing on fast edges unless driven by low-capacitance sources (<10 pF). While adequate for most ADC input buffering, extreme capacitive loads may require series damping resistors or alternative topologies.
What precautions should be taken when cascading multiple stages using the OPA656UB/2K5 to preserve signal integrity across broad bandwidths?
Cascading multiple OPA656UB/2K5 stages introduces cumulative phase shift and potential instability, particularly if interstage delays exceed one-tenth of the signal period at 500 MHz. Each stage should include local decoupling, and overall loop gain must be managed through resistive isolation or gain staging to prevent peaking. Additionally, cumulative noise and distortion will increase, so final-stage gain assignment should minimize early-stage amplification of noise.
What role does the OPA656UB/2K5 play in RF sampling architectures, and how does its architecture support digitization of broadband analog signals?
The OPA656UB/2K5 is well-suited for driving high-speed ADCs in RF sampling receivers due to its combination of bandwidth, slew rate, and DC accuracy. Its voltage feedback topology provides predictable frequency response and low jitter, enabling clean interface with flash or pipeline ADCs. When configured as a driver with appropriate anti-aliasing filtering, it ensures minimal aperture uncertainty and preserves spectral purity during undersampled signal capture.
How do supply current variations affect the OPA656UB/2K5’s power consumption in continuous-wave radar or test-and-measurement equipment?
The OPA656UB/2K5 draws approximately 14 mA per channel at room temperature under nominal conditions. In pulsed applications or systems with sleep modes, this current becomes significant over duty cycles below 1%. Designers must account for this steady-state draw in total power budgeting, especially in multi-channel systems where cumulative quiescent current could approach or exceed active circuit requirements.
What are the implications of using the OPA656UB/2K5 in a differential-to-single-ended conversion stage for video processing circuits?
As a voltage feedback amplifier, the OPA656UB/2K5 can implement precision differential-to-single-ended conversion with good common-mode rejection, provided matched resistors are used and layout symmetry is maintained. However, its limited CMRR at high frequencies (typically <60 dB beyond 10 MHz) may limit performance in noisy environments. For best results, post-conversion filtering and careful PCB symmetry are recommended to suppress residual differential noise.
Does the OPA656UB/2K5 require external compensation when used in non-inverting gain stages above unity?
No, the OPA656UB/2K5 is internally compensated for unity-gain stability, but external compensation may be necessary for gains above 10 depending on feedback resistor values and load capacitance. Excessive feedback capacitance can degrade phase margin and cause overshoot; thus, designers often add small series resistors (e.g., 10–50 Ω) between the feedback node and amplifier output to dampen oscillations.
What is the expected lifetime and reliability profile of the OPA656UB/2K5 under continuous operation at elevated ambient temperatures?
Based on TI’s reliability models and typical Arrhenius degradation behavior, the OPA656UB/2K5 maintains functional integrity over >1 million hours at 85°C ambient, assuming junction temperatures stay below 125°C. Accelerated life testing indicates minimal parametric drift in offset and bias current, though long-term stability should be verified through environmental stress screening in safety-critical applications.
How does electromagnetic interference (EMI) susceptibility affect the OPA656UB/2K5 in unshielded industrial control environments?
The OPA656UB/2K5 features moderate EMI resilience due to its internal filtering and layout, but high-frequency noise coupled into input traces can modulate output signals, particularly in high-gain configurations. Proper shielding, twisted-pair routing for sensitive inputs, and localized ferrite beads help mitigate risks. In extreme cases, integrating RC low-pass networks at inputs may further suppress conducted interference.
What alternatives exist if the OPA656UB/2K5 cannot meet strict power consumption targets below 10 mW per channel?
If ultra-low power is required, alternatives like the OPA356 (CMOS-based, 0.5 mA supply current) offer reduced power but significantly lower bandwidth (50 MHz). Alternatively, discrete transistor solutions or specialized low-power amplifiers such as the LTC6228 might be considered, though they typically sacrifice speed or precision. The OPA656UB/2K5 remains optimal when high speed and low distortion outweigh power concerns.
What steps are necessary to ensure accurate calibration of systems using the OPA656UB/2K5 when input offset voltages vary with temperature?
Since the OPA656UB/2K5 has a temperature coefficient of offset voltage of ~1 µV/°C, calibration routines must account for thermal gradients across the operational envelope. Automated offset nulling via digital potentiometers or periodic background correction algorithms can maintain accuracy. Hardware-wise, keeping the amplifier thermally stable relative to reference circuits helps minimize drift-induced errors in precision measurements.
How does package parasitics in the 8-SOIC form factor influence high-speed performance of the OPA656UB/2K5?
The 8-SOIC package introduces lead inductance (~2–3 nH) and bond wire resistance, which can interact with feedback networks to create unintended resonant peaks above 300 MHz. These parasitics degrade high-frequency stability and increase radiated emissions. To mitigate, keep feedback loops compact, use surface-mount ceramic capacitors rated for high self-resonant frequency, and avoid long traces that act as antennas.
What design verification tests are recommended before deploying the OPA656UB/2K5 in production medical imaging or defense systems?
Before deployment, perform swept-frequency gain/phase analysis to validate stability margins, transient response testing with large step inputs to assess slew-induced distortion, and noise spectral density measurement across bandwidth. Additionally, verify operation over full temperature range with worst-case supply voltages and load conditions. Failure mode analysis should include ESD exposure (≥±2 kV HBM) and latch-up immunity checks per JESD78.

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • 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.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
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Texas Instruments

OPA656UB/2K5

Texas Instruments
41D-OPA656UB/2K5

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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