Texas Instruments

INA128U/2K5G4

INA128U/2K5G4 Description

The INA128U/2K5G4 is an instrumentation amplifier designed by Texas Instruments, offering high performance and reliability in a compact 8SOIC package. This device is optimized for precision applications requiring low input bias current, high gain accuracy, and excellent common-mode rejection. The INA128U/2K5G4 features a wide supply voltage range from 4.5 V to 36 V, making it suitable for a variety of power supply configurations. Despite its obsolescence status, the INA128U/2K5G4 remains a viable option for legacy systems and specific applications where its unique characteristics are essential.

INA128U/2K5G4 Features

• Wide Supply Voltage Range: The INA128U/2K5G4 operates over a wide supply voltage range of 4.5 V to 36 V, providing flexibility in power supply design.
• Low Input Bias Current: With an input bias current of only 2 nA, the INA128U/2K5G4 minimizes the impact of leakage currents, making it ideal for high-impedance sensor applications.
• High Gain Accuracy: The device offers precise gain settings, ensuring accurate signal amplification and minimizing errors in signal processing.
• Excellent Common-Mode Rejection: The INA128U/2K5G4 provides superior common-mode rejection, which is crucial for applications where noise and interference need to be minimized.
• High Bandwidth and Slew Rate: The -3dB bandwidth of 1.3 MHz and a slew rate of 4 V/µs ensure that the amplifier can handle high-frequency signals with minimal distortion.
• Low Supply Current: The INA128U/2K5G4 operates with a low supply current of 700 µA, making it energy-efficient for battery-powered and low-power applications.
• Surface Mount Packaging: The 8SOIC package is suitable for surface mount technology, facilitating automated assembly processes and compact PCB designs.
• Compliance and Reliability: The INA128U/2K5G4 is REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory compliance. It also has a moisture sensitivity level (MSL) of 3, suitable for a 168-hour exposure period.

INA128U/2K5G4 Applications

The INA128U/2K5G4 is well-suited for a variety of applications where precision signal amplification is required. Some specific use cases include:

• Precision Sensor Interfaces: Ideal for interfacing with high-impedance sensors such as strain gauges, thermocouples, and piezoelectric sensors.
• Medical Equipment: Used in medical devices where accurate signal processing is critical, such as ECG and EEG machines.
• Industrial Automation: Suitable for industrial control systems where high reliability and precision are necessary.
• Data Acquisition Systems: The INA128U/2K5G4 can be used in data acquisition systems to amplify weak signals from sensors before digitization.
• Aerospace and Defense: The wide operating voltage range and high performance make it suitable for aerospace and defense applications where reliability and precision are paramount.

Conclusion of INA128U/2K5G4

The INA128U/2K5G4 from Texas Instruments is a versatile instrumentation amplifier that offers high performance and reliability. Its wide supply voltage range, low input bias current, and high gain accuracy make it an excellent choice for precision applications. Despite being marked as obsolete, the INA128U/2K5G4 remains a valuable component for legacy systems and specific applications where its unique features are required. Its compliance with environmental and regulatory standards ensures that it can be used in modern designs without concerns about environmental impact. For applications requiring high-precision signal amplification, the INA128U/2K5G4 is a reliable and efficient solution.