OPA2131UA/2K5

The OPA2131UA/2K5 is a precision operational amplifier (op-amp) manufactured by Texas Instruments. It is designed for high-performance applications requiring low noise, low distortion, and high accuracy. Here’s a detailed description of its key features and specifications:

General Characteristics:

• Type: Precision Operational Amplifier
• Package: The OPA2131 is available in a standard 8-pin SOIC (Small Outline Integrated Circuit) package, which is compact and suitable for surface-mount applications.
• Temperature Range: The device operates over a wide temperature range, typically from -40°C to +85°C, making it suitable for industrial and automotive applications.

Electrical Specifications:

• Supply Voltage: The OPA2131 can operate with a dual supply voltage ranging from ±2.5V to ±18V, or a single supply voltage from 5V to 36V, providing flexibility in various circuit designs.
• Input Offset Voltage: It features a low input offset voltage, typically around 50 µV, which is crucial for applications requiring high precision.
• Input Bias Current: The input bias current is low, typically around 10 pA, minimizing errors in high-impedance applications.
• Common-Mode Rejection Ratio (CMRR): The CMRR is high, typically around 120 dB, ensuring that variations in the input common-mode voltage have minimal effect on the output.
• Power Supply Rejection Ratio (PSRR): The PSRR is also high, typically around 120 dB, which helps maintain stable performance despite fluctuations in the supply voltage.

Performance Characteristics:

• Gain Bandwidth Product: The OPA2131 has a gain bandwidth product of approximately 8 MHz, allowing it to handle a wide range of frequencies while maintaining stability.
• Slew Rate: The slew rate is around 0.5 V/µs, which is adequate for many audio and signal processing applications.
• Total Harmonic Distortion (THD): The op-amp exhibits low total harmonic distortion, typically around 0.0005%, making it suitable for high-fidelity audio applications.

Applications:

The OPA2131 is ideal for a variety of applications, including:

• Audio signal processing
• Data acquisition systems
• Instrumentation amplifiers
• Active filters
• Medical instrumentation
• High-precision analog signal conditioning

Additional Features:

• Rail-to-Rail Output: The output stage is designed to provide rail-to-rail output swing, maximizing the output voltage range and making it suitable for low-voltage applications.
• Low Noise: The op-amp is designed to minimize noise, making it suitable for sensitive applications where signal integrity is paramount.

Conclusion:

The OPA2131UA/2K5 from Texas Instruments is a versatile and high-performance operational amplifier that excels in precision applications. Its combination of low noise, low distortion, and high accuracy makes it a preferred choice for engineers and designers in various fields, including audio, instrumentation, and industrial control systems.