Part Number: OPA2277UA

Manufacturer: Texas Instruments


Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of OPA2277UA

Datasheet  OPA2277UA datasheet
Category Integrated Circuits (ICs)
Family Linear – Amplifiers – Instrumentation, OP Amps, Buffer Amps
Manufacturer Texas Instruments
Packaging Tube
Part Status Active
Amplifier Type General Purpose
Number of Circuits 2
Output Type
Slew Rate 0.8 V/μs
Gain Bandwidth Product 1MHz
-3db Bandwidth
Current – Input Bias 500pA
Voltage – Input Offset 20μV
Current – Supply 790μA
Current – Output / Channel 35mA
Voltage – Supply, Single/Dual (±) 4 V ~ 36 V, ±2 V ~ 18 V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154″, 3.90mm Width)
Supplier Device Package 8-SOIC


Operational amplifiers, or op-amps, are an important part of modern electronics. They are used to boost signals and clean them up in a wide range of situations. The OPA2277UA is a precision op-amp in the OPAx277 series. It has gotten a lot of attention for its great performance and flexible design. In this detailed guide, we’ll look at the OPA2277UA precision operational amplifier’s most important features, benefits, and uses.

Introduction to OPA2277UA

The OPA2277UA is a big step forward in precision op-amp technology. It is meant to replace the well-known OP-177, but it has a lot more to offer. This series has a lot of improvements, such as less noise, a wider output voltage swing, higher speed with lower quiescent current, ultralow offset voltage and drift, high common-mode rejection, low bias current,  and exceptional power source rejection. The OPA2277UA comes in single, dual, and quad versions, and all of them have the same specifications. This gives engineers unmatched design freedom.

OPA2277UA Key Features and Benefits

● Enhanced Performance Across Supply Voltage Range

The OPA2277UA is different from other op-amps because it works well with a wide range of supply voltages, from 2V to 18V. Most other op-amps are often defined for a single supply voltage. Because of this, it is a great choice for real-world applications, where the power source is often different.

● Ultralow Offset Voltage and Drift

The starting offset voltage of the OPA2277UA is capped at 20V, which is very low. This amazing feature makes it so that the user doesn’t have to make as many changes, making sure that jobs involving amplification are done accurately and precisely. Also, the low offset voltage shift due to changes in temperature ensures stability and reliability over time.

● Excellent Dynamic Behavior and Stability

Stability is one of the most important things about an operating amplifier. In this way, the OPA2277UA does a great job. It stays stable in setups with unity gain and has great dynamic behavior across a wide range of load conditions. Even as the amplifier gets closer to its power limits, this stability stays the same.

● External Trim Pins for Special Applications

External trim pins are available on the single form of the OPA2277UA (OPA277) for use cases where fine adjustments are needed. These pins make fine-tuning and calibration easier, which is useful for uses that need to be very accurate.

● Freedom from Phase Inversion and Overload Issues

With the OPA2277UA, you don’t have to worry about phase reversal or overloading, which can happen with other operational amplifiers. This feature makes sure that the booster works consistently and reliably, so it can be used in more situations.

● Independent Circuitry in Dual and Quad Versions

Both the dual and quad models of the OPA2277UA have completely separate circuitry. This keeps crosstalk and interference to a minimum. Even when overdriven or overloaded, these versions keep each channel separate, which keeps the purity of the signal.

Applications of OPA2277UA

The OPA2277UA is a useful part of a wide range of applications because it can be used in many ways and works well.

● Precision Measurement Instruments

The OPA2277UA is a great choice for high-precision measurement instruments such as digital multimeters, data acquisition systems, and calibration tools because it has a low offset voltage and drift and good common-mode and power supply rejection.

● Sensor Signal Conditioning

Weak sensor signals often need to be amplified and conditioned before they can be used. The OPA2277UA is a great choice for sensor signal conditioning tasks because it has low noise, good common-mode rejection, and stability in unity gain configurations.

● Sound and high-fidelity systems

For op-amps to deliver great sound clarity, they need to have low noise and wide bandwidth. The OPA2277UA can be used in audio amplifiers, preamplifiers, and high-fidelity systems because its specs have been improved.

● Control Systems and Feedback Loops

The OPA2277UA is good for control systems and feedback loops because it is stable and each channel can work on its own. This makes data processing accurate and reliable.

● Medical Equipment

It’s important for medical equipment to be accurate and reliable. The OPA2277UA is a great choice for medical tools because it has a low offset voltage, drift, and bias current, and it works well even when the supply voltage changes.

Practical Tips and Considerations

Circuit Design Guidelines

For the OPA2277UA to work at its best, designers must carefully consider a number of things when making circuits. Follow these rules to get the best results from this precise operational amplifier in your circuit:

Select Proper Operating Voltage Range:

  • Choose a power supply level that fits the needs of your application from the range of 2V to 18V.
  • Make sure the power source is stable and free of noise so it doesn’t affect how well the op-amp works.

Use High-Quality Components:

  • To keep accuracy, choose resistors and capacitors with a low-temperature coefficient and low range.
  • Choose parts that have low noise levels to keep the op-amp’s low noise edge.

Minimize Noise and Interference:

  • Put decoupling capacitors near the OPA2277UA’s power source pins to cut down on high-frequency noise.
  • To avoid interference, keep signal lines away from noisy parts or high-power circuits.

Implement Proper Grounding:

  • Use a firm ground plane or the star-grounding method to reduce noise and ground loops.
  • Make sure the op-amp and other parts have a clean, low-impedance ground link.

Consider Input Protection:

  • Include input safety parts like clamping diodes to keep the op-amp safe from situations where the voltage is too high.
  • Use resistors in series at the input to limit the amount of power during transients and keep damage from happening.

Stability and Load Conditions

  • For a circuit to work reliably, it must keep its steadiness and dynamic behavior even when the load changes. If you follow these suggestions, the OPA2277UA will stay stable:

Compensate for Capacitive Loads:

  • If your circuit involves capacitive loads, consider adding a small resistor (typically 10-100 Ω) in series with the output to enhance stability.

Unity Gain Stability:

  • The OPA2277UA is stable in unity gain configurations. For other gain levels, make sure the closed-loop bandwidth is substantially below the op-amp.

Bypass Unused Inputs:

  • If any input is unused (such as in single-ended configurations), connect it to a known voltage or ground through a resistor to prevent unintended signal pickup.

Avoid Output Short-Circuits:

  • Prevent accidental output short-circuits, as they can cause thermal stress and affect long-term reliability. Include current-limiting resistors if necessary.

Compensate for Temperature Effects:

  • Account for temperature-induced changes in circuit performance. Ensure that critical components are well within their specified temperature ranges.

Test Under Various Load Conditions:

  • Evaluate your circuit’s performance by simulating or testing it under different load conditions, including minimum and maximum loads, to verify stability.


Unleash the potential of the OPA2277UA, a pinnacle in the OPAx277 series, surpassing the OP-177 standard. With ultra-low offset voltage, minimal bias current, and superior rejection capabilities, it ensures unparalleled precision and stability in various real-world applications. Elevate your analog designs with the OPA2277UA – available through China’s leading electronic component seller, ICRFQ. Redefine precision – connect with ICRFQ and secure your OPA2277UA now!

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