OPA2131UA
Dual Low Noise Amplifier Op Amp ±18V 8-Pin SOIC TubeOPA2131UA
Dual Low Noise Amplifier Op Amp ±18V 8-Pin SOIC Tube
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Manufacturer Part # : OPA2131UA
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Package/Case: SOIC-8
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Brand: Texas Instruments
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Product Categories : Instrumentation, OP Amps, Buffer Amps
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Series : OPA2131
Quality Assurance
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Shipping & Payment
About Shipping
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
Confirm the return or exchange with our staff.
Maintain the goods in their original condition as received.
Lastly, please note that the eligibility for return or exchange of goods is subject to an assessment of the actual condition of the returned items. We will evaluate the received goods before finalizing the return or exchange process. If you have any inquiries or require further assistance regarding returns or exchanges, please don't hesitate to contact us at [email protected]
About packaging
Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.

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OPA2131UA DataSheet

Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Interested Parts
OPA2131UA Details
The OPA2131UA is a dual op amp from Texas Instruments, designed for high-performance applications requiring low noise and distortion characteristics. This device features a wide supply range, excellent capacitive load drive, and single, dual, or quad versions, making it suitable for various audio equipment and measuring instruments.
Key Features
- FET INPUT: IB = 50pA max for low input current
- LOW OFFSET VOLTAGE: 750uV max for reduced noise and distortion
- WIDE SUPPLY RANGE: ±4.5V to ±18V for flexibility in design
- SLEW RATE: 10V/us for fast response times
- WIDE BANDWIDTH: 4MHz for high-frequency applications
- EXCELLENT CAPACITIVE LOAD DRIVE: For driving capacitive loads with minimal distortion
Application
- Audio Equipment: Suitable for professional audio mixers, headphones, and preamplifiers requiring low noise and distortion characteristics
- Measuring Instruments: Used in various measuring instruments due to its low noise and distortion characteristics
Where to Use
The OPA2131UA is suitable for a wide range of applications, including audio equipment, measuring instruments, and other devices requiring high-performance op amps.
How to Use
To use the OPA2131UA, ensure proper power supply connections to VCC and GND. Use the device's input and output pins according to the datasheet for optimal performance. For detailed usage instructions, refer to the datasheet.
Application Circuit
The application circuit diagram for the OPA2131UA illustrates how to connect the op amp in various applications, including audio equipment and measuring instruments. It includes connections for power supply, ground, and input/output signals, ensuring proper operation and optimal performance.
(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)
Equivalents
- OPA2134: A similar dual op amp from Texas Instruments offering comparable features and performance.
Complementary
The OPA2131UA can be complemented by other op amps from Texas Instruments, such as the OPA2134 or OPA2340, which offer additional features and specifications suitable for various applications.
When selecting complementary devices, ensure that their features and specifications align with your specific application requirements for optimal performance and compatibility.
Frequently Asked Questions
Q: What is the maximum bandwidth supported by the OPA2131UA?
A: The OPA2131UA supports a wide bandwidth of 4MHz. For more details, refer to the datasheet for specific operating conditions and limitations.
Q: Can the OPA2131UA be used in audio equipment applications?
A: Yes, the OPA2131UA is suitable for various audio equipment applications, including professional audio mixers, headphones, and preamplifiers, due to its low noise and distortion characteristics.

Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Number of channels | 2 | Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 36 |
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 9 | Vos (offset voltage at 25°C) (max) (mV) | 1 |
GBW (typ) (MHz) | 4 | Slew rate (typ) (V/µs) | 10 |
Rail-to-rail | No | Offset drift (typ) (µV/°C) | 2 |
Iq per channel (typ) (mA) | 1.5 | Vn at 1 kHz (typ) (nV√Hz) | 15 |
CMRR (typ) (dB) | 80 | Rating | Catalog |
Operating temperature range (°C) | -55 to 125 | Input bias current (max) (pA) | 50 |
Iout (typ) (A) | 0.025 | Architecture | FET |
Input common mode headroom (to negative supply) (typ) (V) | 3 | Input common mode headroom (to positive supply) (typ) (V) | -1 |
Output swing headroom (to negative supply) (typ) (V) | 2.5 | Output swing headroom (to positive supply) (typ) (V) | -2.5 |
THD + N at 1 kHz (typ) (%) | 0.0008 |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is OPA2131UA?
The OPA2131UA is a high-performance, precision audio operational amplifier manufactured by Texas Instruments. It is designed for audio applications that require high fidelity, low distortion, and low noise performance, such as audiophile equipment, audio mixers, and professional audio systems.
How Does OPA2131UA Work?
The OPA2131UA operates as a precision operational amplifier specifically optimized for audio applications. It provides low distortion and high bandwidth to accurately amplify audio signals with minimal noise interference. The amplifier is designed to deliver high-quality sound reproduction in audio circuits with precision and stability.
How Many Pins does OPA2131UA have and What are the Functions of the Pinout Configuration?
The OPA2131UA is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- V+: Positive power supply pin.
- V-: Negative power supply pin.
- IN+: Non-inverting input pin.
- IN-: Inverting input pin.
- OUT: Output pin.
- NC (Not Connected): No connection pin.
What are the Pros and Cons of OPA2131UA?
Pros:
- High Fidelity: Delivers high-quality audio reproduction with low distortion.
- Low Noise: Provides a quiet operational environment for audio circuits.
- Wide Bandwidth: Offers high bandwidth suitable for audio signal processing.
- Precision: Ensures accurate and stable amplification of audio signals.
- Compact Package: The 8-pin SOIC package is space-efficient for compact designs.
Cons:
- Cost: High-performance audio amplifiers like the OPA2131UA may be more expensive than standard alternatives.
- Power Consumption: May consume more power compared to lower-performance audio amplifiers.
- External Components: Additional external components may be required for specific audio circuit configurations.
Are There Any Equivalents/Alternatives to OPA2131UA for Recommendation?
- The OPA2134 from Texas Instruments is a similar precision audio amplifier with slightly different specifications.
- Alternatives to the OPA2131UA include the AD823 from Analog Devices and the LM4562 from Texas Instruments.
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