OPA345NA/3K

The OPA345NA/3K is a precision operational amplifier (op-amp) manufactured by Texas Instruments. It is designed for a wide range of applications, including signal conditioning, data acquisition, and active filtering. Here’s a detailed description of its key features and specifications:

General Characteristics:

• Type: Precision Operational Amplifier
• Package: The OPA345 is typically available in an 8-pin SOIC (Small Outline Integrated Circuit) package, which is compact and suitable for surface-mount applications.
• Temperature Range: The device operates over an extended temperature range, typically from -40°C to +125°C, making it suitable for industrial and automotive applications.

Electrical Specifications:

• Supply Voltage: The OPA345 can operate with a single supply voltage ranging from 2.7V to 5.5V, or with dual supplies of ±1.35V to ±2.75V.
• Input Offset Voltage: It features a low input offset voltage, typically around 50 µV, which enhances accuracy in precision applications.
• Input Bias Current: The input bias current is very low, typically around 10 pA, which minimizes errors in high-impedance applications.
• Gain Bandwidth Product: The gain bandwidth product is approximately 1 MHz, allowing for sufficient bandwidth in many applications.
• Slew Rate: The slew rate is about 0.1 V/µs, which is adequate for many low-frequency applications.

Performance Features:

• Low Noise: The OPA345 is designed to have low noise characteristics, making it suitable for sensitive signal processing tasks.
• Rail-to-Rail Output: The output stage is designed to be rail-to-rail, allowing the output voltage to swing very close to the supply rails, maximizing the dynamic range.
• High Common-Mode Rejection Ratio (CMRR): The CMRR is typically around 100 dB, ensuring that variations in the supply voltage do not significantly affect the output.
• High Power Supply Rejection Ratio (PSRR): The PSRR is also high, which helps maintain stable operation despite fluctuations in the supply voltage.

Applications:

The OPA345 is ideal for applications such as:

• Signal conditioning in sensor applications
• Data acquisition systems
• Active filters
• Audio processing
• Medical instrumentation
• Industrial control systems

Conclusion:

The OPA345NA/3K from Texas Instruments is a versatile and high-performance operational amplifier that combines precision, low power consumption, and a wide operating range. Its features make it suitable for a variety of demanding applications, particularly where accuracy and reliability are critical.