Texas Instruments

OPA128KM

OPA128KM Description

The OPA128KM is a general-purpose operational amplifier from Texas Instruments, designed for a wide range of applications requiring high performance and reliability. This op-amp is part of the Difet® series, known for its robustness and versatility. The OPA128KM features a supply voltage range of 10 V to 36 V, making it suitable for various power supply configurations. It operates within a temperature range of 0°C to 70°C, ensuring stable performance in typical industrial and commercial environments. The device is housed in a TO99-8 package, which is ideal for through-hole mounting, providing a secure and durable solution for printed circuit board (PCB) assembly.

OPA128KM Features

• High Gain Bandwidth Product: The OPA128KM offers a gain bandwidth product of 1 MHz, enabling it to handle high-frequency signals with minimal distortion. This feature is particularly beneficial in applications requiring precise signal processing and amplification.
• Low Input Bias Current: With an input bias current of only 0.075 pA, the OPA128KM minimizes the impact of bias currents on the input signal, ensuring high accuracy and stability in sensitive circuits.
• Low Input Offset Voltage: The low input offset voltage of 140 µV ensures that the op-amp maintains high accuracy, even in low-level signal applications. This is crucial for maintaining signal integrity and minimizing errors in precision circuits.
• High Slew Rate: The 3V/µs slew rate allows the OPA128KM to respond quickly to changes in input signals, making it suitable for applications requiring rapid signal transitions.
• Low Supply Current: Consuming only 900µA of supply current, the OPA128KM is energy-efficient, making it ideal for applications where power consumption is a concern.
• High Output Current: The OPA128KM can deliver up to 10 mA of output current per channel, providing sufficient drive capability for a wide range of loads.
• Compliance and Reliability: The OPA128KM is REACH unaffected and ROHS3 compliant, ensuring it meets stringent environmental and safety standards. Additionally, its moisture sensitivity level (MSL) of 1 (unlimited) makes it highly reliable in various environmental conditions.

OPA128KM Applications

The OPA128KM is well-suited for a variety of applications due to its versatile performance characteristics. Some specific use cases include:

• Signal Conditioning: The OPA128KM's low input bias current and low input offset voltage make it ideal for conditioning low-level signals in sensors and transducers, ensuring accurate and reliable signal transmission.
• Audio Amplification: With its high gain bandwidth product and high slew rate, the OPA128KM can be used in audio systems to amplify and process audio signals with minimal distortion, delivering high-fidelity audio output.
• Industrial Control Systems: The wide supply voltage range and robust performance make the OPA128KM suitable for industrial control systems, where it can be used for signal processing and control loop applications.
• Medical Equipment: The OPA128KM's precision and reliability are beneficial in medical equipment, where accurate signal processing is critical for patient monitoring and diagnostic applications.

Conclusion of OPA128KM

The OPA128KM is a versatile and high-performance operational amplifier that offers a combination of features that make it suitable for a wide range of applications. Its low input bias current, low input offset voltage, and high slew rate ensure accurate and reliable signal processing, while its energy efficiency and robustness make it ideal for various industrial and commercial environments. Although the OPA128KM is now obsolete, it remains a reliable choice for applications requiring a general-purpose op-amp with high performance and durability.