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HomeProductsIntegrated Circuits (ICs)Linear - Amplifiers - Instrumentation, OP Amps, Buffer AmpsOPA2251PAG4
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OPA2251PAG4 - Burr Brown

Manufacturer Part Number
OPA2251PAG4
Manufacturer
Burr Brown
Allelco Part Number
32D-OPA2251PAG4
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
10,162 pcs available, New & Original
Parts Description
IC OPAMP GP 2 CIRCUIT 8DIP
Package
8-PDIP
Data sheet
-
RoHs Status
 
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Our certification
In stock: 10162
  • Unit Price: $4.531
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $4.531 $4.53
200+ $1.754 $350.80
500+ $1.693 $846.50
1000+ $1.661 $1,661.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

OPA2251PAG4 Tech Specifications
Burr Brown - OPA2251PAG4 technical specifications, attributes, parameters and parts with similar specifications to Burr Brown - OPA2251PAG4

Product Attribute Attribute Value
Manufacturer Burr Brown
Voltage - Supply Span (Min) 2.7 V
Voltage - Supply Span (Max) 36 V
Voltage - Input Offset 100 µV
Supplier Device Package 8-PDIP
Slew Rate 0.01V/µs
Series microPOWER™
Package / Case 8-DIP (0.300", 7.62mm)
Package Bulk
Product Attribute Attribute Value
Output Type Rail-to-Rail
Operating Temperature -40°C ~ 85°C
Number of Circuits 2
Mounting Type Through Hole
Gain Bandwidth Product 35 kHz
Current - Supply 27µA (x2 Channels)
Current - Output / Channel 50 mA
Current - Input Bias 20 nA
Amplifier Type General Purpose

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
ECCN EAR99

Frequently Asked Questions(FAQ)

How does the OPA2251PAG4’s microPOWER™ architecture impact battery life in low-duty-cycle sensor conditioning applications?
The OPA2251PAG4 draws only 27 µA per channel from a 2.7 V to 36 V supply, resulting in total quiescent current of 54 µA for both amplifiers. In a typical 3.3 V battery-powered strain gauge amplifier sampling at 10 Hz with 1% duty cycling, this translates to average supply current below 1 µA when combined with proper shutdown control. This ultra-low static power enables multi-year operation from coin-cell batteries, especially when paired with duty-cycled excitation and ADC sampling.
What are the practical limitations of the OPA2251PAG4’s 0.01 V/µs slew rate in signal chain design?
With a slew rate of 0.01 V/µs, the OPA2251PAG4 can support full-scale output transitions (e.g., 0 V to 3.3 V) in approximately 330 µs. This restricts its use to low-frequency applications such as temperature monitoring, pressure sensing, or 4–20 mA loop interfaces where signal bandwidth rarely exceeds 1 kHz. For audio or fast transient detection, this device introduces significant distortion due to slew-induced nonlinearity, making it unsuitable despite its rail-to-rail output capability.
Can the OPA2251PAG4 drive a 100 nF capacitive load directly without stability issues?
The OPA2251PAG4 is not internally compensated for capacitive loads above 10 nF. Driving 100 nF directly risks oscillation due to phase lag in the feedback path. A series isolation resistor of 100 Ω to 1 kΩ between the output and load, combined with a small feedback capacitor (1–10 pF), restores stability by reducing loop gain at high frequencies. This technique is commonly used in industrial transmitter outputs where long cables present distributed capacitance.
How does input bias current of 20 nA affect accuracy in high-impedance sensor interfaces using the OPA2251PAG4?
At 20 nA, the input bias current of the OPA2251PAG4 generates a 2 mV offset across a 100 kΩ source impedance—significant in precision thermocouple or pH electrode circuits. While acceptable for RTD or strain gauge bridges with lower source impedances (<10 kΩ), this parameter necessitates careful layout and guarding in high-Z applications. Using guard rings around input traces and minimizing PCB leakage paths become critical to maintain microvolt-level accuracy.
Is the OPA2251PAG4 suitable for single-supply 3.3 V systems requiring true zero-volt output swing?
Yes, the rail-to-rail output stage of the OPA2251PAG4 allows the output to swing within millivolts of the negative rail (ground) under light loads. In a 3.3 V single-supply configuration driving a 10 kΩ load, output can reach within 5 mV of ground and 3.29 V near the positive rail. This enables accurate representation of small signals near ground, such as in shunt-based current sensing or bridge null detection, without requiring a negative supply.
How does the OPA2251PAG4 compare to the OPA333 in terms of power efficiency and noise performance for portable instrumentation?
The OPA2251PAG4 consumes slightly more quiescent current (54 µA total vs. 17 µA for OPA333 dual) but offers superior input offset voltage (100 µV vs. 150 µV typical) and better PSRR. For applications where microvolt-level accuracy outweighs marginal power savings—such as medical ECG front-ends or precision weigh scales—the OPA2251PAG4 provides tighter error budgeting. However, in ultra-low-power data loggers with relaxed accuracy needs, the OPA333 may be preferred.
What thermal considerations apply when using both channels of the OPA2251PAG4 in an 8-DIP package at maximum output current?
Each channel of the OPA2251PAG4 can source 50 mA, but sustained operation at this level in the 8-PDIP package leads to significant self-heating. At 50 mA into a 100 Ω load with 5 V supply, power dissipation per channel reaches 250 mW. With both channels active, total dissipation approaches 500 mW, raising junction temperature by over 50°C above ambient in still air. Derating output current or adding a small heatsink is recommended for continuous high-load operation.
Can the OPA2251PAG4 be used in a 4–20 mA current loop transmitter without additional buffering?
The OPA2251PAG4 can directly drive the feedback network in a 4–20 mA transmitter if the load impedance remains below 1 kΩ and the compliance voltage is within the 2.7 V to 36 V range. Its 50 mA output current capability exceeds typical loop requirements (usually <25 mA), and rail-to-rail input allows sensing across a low-side shunt resistor. However, external protection diodes are advised to safeguard against field-induced transients common in industrial environments.
How does the 35 kHz gain bandwidth product of the OPA2251PAG4 influence filter design in anti-aliasing applications?
With a gain bandwidth product of 35 kHz, the OPA2251PAG4 supports closed-loop gains up to 35 at 1 kHz or unity gain at 35 kHz. This makes it suitable for second-order Sallen-Key low-pass filters targeting cutoff frequencies below 3 kHz. For higher-order filters or sharper roll-offs, the limited bandwidth introduces phase lag and gain error near the cutoff, requiring simulation or bench validation to ensure adequate attenuation before ADC sampling.
What layout practices are essential to maintain stability and performance in through-hole designs using the OPA2251PAG4?
In 8-DIP through-hole layouts, minimize lead inductance by keeping feedback components (resistors and capacitors) within 5 mm of the input and output pins. Use a solid ground plane beneath the device and place a 100 nF ceramic decoupling capacitor directly across the supply pins, as close to the package as possible. Avoid routing high-impedance nodes over split planes, and ensure symmetry between the two amplifier channels to reduce crosstalk in differential configurations.

Parts with Similar Specifications

The three parts on the right have similar specifications to Burr Brown OPA2251PAG4

Product Attribute OPA2251PAG4 OPA2251UA/2K5G4 OPA2244PAG4 OPA2251PA
Part Number OPA2251PAG4 OPA2251UA/2K5G4 OPA2244PAG4 OPA2251PA
Manufacturer Texas Instruments Texas Instruments Luminary Micro / Texas Instruments Texas Instruments
Voltage - Input Offset - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Mounting Type - Surface Mount Through Hole Surface Mount
Number of Circuits - - - -
Voltage - Supply Span (Max) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Current - Supply - - - -
Amplifier Type - - - -
Series - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Voltage - Supply Span (Min) - - - -
Current - Input Bias - - - -
Slew Rate - - - -
Gain Bandwidth Product - - - -
Current - Output / Channel - - - -
Output Type - Current - Unbuffered Voltage - Buffered -

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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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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.

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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.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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OPA2251PAG4

Burr Brown
32D-OPA2251PAG4

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

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