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HomeProductsIntegrated Circuits (ICs)Linear - Amplifiers - Instrumentation, OP Amps, Buffer AmpsOPA657NB/250G4
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OPA657NB/250G4 - Texas Instruments

Manufacturer Part Number
OPA657NB/250G4
Manufacturer
Texas Instruments
Allelco Part Number
98D-OPA657NB/250G4
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
14,528 pcs available, New & Original
Parts Description
IC OPAMP VFB 1 CIRCUIT SOT23-5
Package
SOT-23-5
Data sheet
-
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 14528
  • Unit Price: $9.245
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $9.245 $9.25
10+ $9.245 $92.45
12+ $9.245 $110.94
250+ $3.578 $894.50
500+ $3.452 $1,726.00
1000+ $3.391 $3,391.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

OPA657NB/250G4 Tech Specifications
Texas Instruments - OPA657NB/250G4 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - OPA657NB/250G4

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply Span (Min) 8 V
Voltage - Supply Span (Max) 12 V
Voltage - Input Offset 100 µV
Supplier Device Package SOT-23-5
Slew Rate 700V/µs
Series -
Package / Case SC-74A, SOT-753
Package Tape & Reel (TR)
Output Type -
Product Attribute Attribute Value
Operating Temperature -40°C ~ 85°C
Number of Circuits 1
Mounting Type Surface Mount
Gain Bandwidth Product 1.6 GHz
Current - Supply 14mA
Current - Output / Channel 70 mA
Current - Input Bias 1 pA
Base Product Number OPA657
Amplifier Type Voltage Feedback
-3db Bandwidth 350 MHz

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 2 (1 Year)
REACH Status REACH Unaffected
ECCN EAR99

Frequently Asked Questions(FAQ)

What is the maximum input offset voltage and how does it impact precision applications for the OPA657NB/250G4?
The OPA657NB/250G4 features a typical input offset voltage of 100 µV, which is exceptionally low for a high-speed operational amplifier. This characteristic makes it suitable for precision analog front-ends where signal integrity depends on minimal DC error accumulation. In systems such as sensor signal conditioning or reference buffering, this level of offset ensures that even small input signals remain within measurable accuracy limits. When cascading stages in a multistage amplifier, the cumulative effect of offset can be mitigated by careful layout and calibration, but the OPA657’s performance supports designs requiring sub-millivolt precision without additional compensation circuits.
How does the slew rate of 700 V/µs compare to other amplifiers in similar bandwidth ranges, and what design implications does this impose for the OPA657NB/250G4?
With a slew rate of 700 V/µs, the OPA657NB/250G4 significantly exceeds many general-purpose amplifiers that typically offer 1–10 V/µs at comparable gain-bandwidth products. For example, when driving large capacitive loads or processing fast transient signals—such as in video amplification or pulse detection—this high slew rate ensures linear response without distortion. However, designers must account for the trade-off between speed and power; the OPA657 consumes 14 mA from a ±8V to ±12V supply, necessitating thermal and power budget considerations in compact designs.
Can the OPA657NB/250G4 reliably drive capacitive loads above 100 pF without instability, and what external components are required?
Yes, the OPA657NB/250G4 maintains stability with capacitive loads up to 1 nF due to its internal compensation architecture optimized for voltage feedback topology. Unlike some unity-gain stable opamps, this device uses non-inverting compensation, which allows higher closed-loop gains while preserving phase margin under heavy capacitive loading. To ensure stability across all configurations, a small series resistor (typically 2–10 Ω) may be added at the output if load capacitance exceeds 500 pF, especially in high-impedance feedback networks. This approach prevents peaking and overshoot during transient events.
How does the gain bandwidth product of 1.6 GHz influence closed-loop gain selection in RF or communication systems using the OPA657NB/250G4?
The 1.6 GHz gain bandwidth product enables the OPA657NB/250G4 to operate effectively at closed-loop gains as low as 5 while still delivering usable bandwidth. For instance, at a gain of 20 dB (10x), the theoretical -3 dB bandwidth would approximate 160 MHz, though real-world performance may vary slightly due to PCB parasitics and feedback network impedance. In broadband instrumentation, this allows single-stage amplification without sacrificing dynamic range. Designers should avoid excessive gain beyond 40 dB unless necessary, as noise and phase margin degrade with increasing gain, potentially introducing peaking or ringing in time-domain responses.
What is the significance of the input bias current being less than 1 pA, and how does this affect high-impedance source interfacing?
A bias current below 1 pA means the OPA657NB/250G4 draws negligible current from high-resistance sources, minimizing loading effects in applications like photodiode preamplifiers or thermocouple interfaces. In such cases, stray capacitance at the input node could otherwise cause integration drift or reduced settling time. Since the input stage uses FET technology, leakage currents are suppressed to levels where even megaohm-range source impedances do not compromise signal fidelity. However, proper guard rings and low-leakage PCBs are recommended to prevent parasitic coupling in ultra-sensitive environments.
How does the operating temperature range of -40°C to 85°C affect reliability in industrial control systems using the OPA657NB/250G4?
The extended industrial temperature range ensures reliable operation in ambient conditions common to factory automation, automotive subsystems, and outdoor monitoring equipment. Within this span, parameters such as input offset voltage and supply current exhibit well-controlled variation, allowing predictable performance without recalibration. The package’s hermetic sealing in the SOT-23-5 form factor also contributes to long-term stability against moisture ingress, particularly important given its MSL rating of Level 2. Designers can confidently deploy the OPA657NB/250G4 in environments subject to thermal cycling without concern for premature failure due to junction stress.
What are the key differences between the OPA657NB/250G4 and the substitute part OPA657N/250 in terms of packaging and availability?
While both parts share identical electrical characteristics, the OPA657NB/250G4 uses a lead-free, RoHS-compliant variant of the standard SOT-23-5 package with improved solderability profile, whereas the OPA657N/250 may be older-generation and subject to stricter lead restrictions. Additionally, the “G4” suffix indicates compliance with Texas Instruments’ latest green manufacturing standards, enhancing supply chain resilience. From a design perspective, pin compatibility allows direct substitution, but engineers should verify assembly line capabilities and shelf-life expectations, as the NB version has an MSL of 2 (1 year), ensuring consistent storage handling.
Is the OPA657NB/250G4 suitable for use in battery-powered wireless sensor nodes, considering its current consumption and supply requirements?
Although the OPA657NB/250G4 consumes 14 mA at full swing, its wide supply range (±8V to ±12V) suggests primary use in powered instrumentation rather than low-voltage battery systems. In typical single-supply configurations (e.g., +10V to +12V), total quiescent current remains moderate, but energy efficiency is secondary to speed and precision. For battery-operated nodes, alternative amplifiers with lower quiescent current (<1 mA) would be preferable. However, if the application prioritizes bandwidth and linearity over power, the OPA657 can still function—provided duty cycling or sleep modes reduce average power draw.
How should feedback resistors be selected to maximize bandwidth and minimize noise in a transimpedance amplifier configuration using the OPA657NB/250G4?
In a transimpedance setup, feedback resistance directly sets both gain and bandwidth, but excessive resistance increases Johnson-Nyquist noise and may degrade stability due to stray capacitance. For the OPA657NB/250G4, optimal performance occurs when Rf is chosen below the value that causes phase margin loss—typically under 10 kΩ for photodiode applications. If higher gain is needed, consider adding a small capacitor (e.g., 1–10 pF) in parallel with Rf to limit bandwidth and suppress high-frequency oscillations. Always keep the feedback path short to avoid parasitic inductance and maintain the amplifier’s inherent 350 MHz bandwidth capability.
What precautions should be taken when laying out PCBs for the OPA657NB/250G4 to preserve its high-speed performance?
Given its 1.6 GHz GBW and 700 V/µs slew rate, the OPA657NB/250G4 demands strict attention to parasitic inductance and capacitance. Use a solid ground plane, minimize trace lengths on feedback and output paths, and avoid stubs near high-impedance nodes. Place bypass capacitors as close as possible to the supply pins using 0.1 µF ceramic types rated for RF frequencies. Input traces should be shielded from switching regulators or digital clocks to prevent capacitive crosstalk. Thermal vias under the exposed pad (if present) improve heat dissipation, though this package lacks one—so conduction through adjacent copper is limited.
How does the output drive capability of 70mA compare to other amplifiers in the same package size, and what loads can the OPA657NB/250G4 safely handle?
At 70 mA output current, the OPA657NB/250G4 offers robust drive strength uncommon in SOT-23-5 packages, where most devices cap around 20–30 mA. This allows direct interface with relay coils, LED arrays, or small actuators without requiring buffer stages. However, sustained delivery above 50 mA risks exceeding the absolute maximum ratings unless heatsinking is provided. For resistive loads, the amplifier can source/sink into ohmic loads down to approximately 10 Ω without significant droop, making it viable for driving ADC inputs or comparator references with fast edge rates.
Are there any known limitations when using the OPA657NB/250G4 in unity-gain buffer configurations?
Unity-gain buffering is feasible, but stability margins are reduced compared to higher-gain settings. The OPA657 uses non-inverting compensation, which provides better stability than some competitors in unity-gain, yet aggressive capacitive loading (>1 nF) can still induce ringing. To mitigate this, add a small series resistor (1–5 Ω) at the output or insert a damping capacitor (10–100 pF) in parallel with the feedback resistor. This trade-off sacrifices some bandwidth for robustness, so evaluate whether the full 350 MHz bandwidth is essential in buffered topologies.
How does the OPA657NB/250G4 perform in differential amplifier configurations, and what matching requirements exist?
As a single-supply, rail-to-rail output amplifier, the OPA657NB/250G4 can implement differential stages, but resistor matching becomes critical for CMRR. Mismatches greater than 0.1% in feedback networks degrade common-mode rejection, especially at higher frequencies. Use metal-film resistors with tight tolerance (≤0.1%) and co-locate them thermally. The high open-loop CMRR (~100 dB typ.) helps, but practical system CMRR rarely exceeds 60 dB due to external mismatches. For best results, calibrate offsets post-deployment or use chopper-stabilized alternatives if long-term drift is unacceptable.
What role does the Moisture Sensitivity Level (MSL) of 2 play in assembly processes involving the OPA657NB/250G4?
An MSL of 2 indicates the OPA657NB/250G4 can withstand two reflow cycles without additional baking, assuming storage conditions comply with IPC/JEDEC standards. After removal from moisture-barrier bags, exposure to ambient humidity must be minimized, and re-baking is only required if the floor life exceeds one year. This level simplifies production logistics compared to MSL 3+ parts, reducing handling overhead while maintaining reliability in standard SMT lines equipped with nitrogen reflow ovens.
How does the ECCN classification of EAR99 affect international sourcing decisions for the OPA657NB/250G4?
Classified under EAR99, the OPA657NB/250G4 is generally unrestricted for export under U.S. regulations, simplifying procurement for global engineering teams. Most countries do not impose special licensing requirements on commercial-grade analog ICs like this one, provided end-use isn’t tied to military or surveillance applications that trigger stricter controls. However, exporters should still verify local import rules, as some jurisdictions regulate high-performance analog components regardless of ECCN status.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments OPA657NB/250G4

Product Attribute OPA657N/250G4 OPA657NB/250 OPA657NB/3KG4 OPA657N/250
Part Number OPA657N/250G4 OPA657NB/250 OPA657NB/3KG4 OPA657N/250
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Current - Input Bias - - - -
-3db Bandwidth - - - -
Current - Supply - - - -
Voltage - Input Offset - - - -
Amplifier Type - - - -
Slew Rate - - - -
Number of Circuits - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Gain Bandwidth Product - - - -
Voltage - Supply Span (Min) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Series - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Supply Span (Max) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Current - Output / Channel - - - -

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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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DHL & FedEx Shipment Charges Reference
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1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
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OPA657NB/250G4 Image

OPA657NB/250G4

Texas Instruments
98D-OPA657NB/250G4

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

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