Texas Instruments

INA128UA

INA128UA Description

The INA128UA from Texas Instruments is a high-precision instrumentation amplifier designed for demanding signal conditioning applications. Packaged in an 8-SOIC surface-mount form factor, this single-channel IC delivers exceptional accuracy with a low input offset voltage (25 µV) and minimal input bias current (2 nA). Operating over a wide supply voltage range (4.5V to 36V), it is optimized for low-power systems, consuming only 700µA of supply current. With a 1.3 MHz bandwidth and 4V/µs slew rate, the INA128UA ensures high-speed signal amplification while maintaining stability. Its ROHS3 compliance and REACH-unaffected status make it suitable for environmentally conscious designs.

INA128UA Features

• Low Input Offset Voltage (25 µV): Ensures precision amplification for sensitive measurements.
• Ultra-Low Bias Current (2 nA): Minimizes errors in high-impedance sensor interfaces.
• Wide Supply Range (4.5V–36V): Supports both single and dual-supply configurations.
• Low Power Consumption (700µA): Ideal for battery-powered and portable applications.
• High CMRR and PSRR: Rejects common-mode noise, critical in industrial environments.
• Surface-Mount 8-SOIC Package: Compact and suitable for space-constrained PCBs.
• 1.3 MHz Bandwidth & 4V/µs Slew Rate: Balances speed and precision for dynamic signals.

INA128UA Applications

The INA128UA excels in applications requiring high-accuracy signal amplification, such as:

• Medical Instrumentation: ECG amplifiers, patient monitoring systems.
• Industrial Sensors: Strain gauges, bridge amplifiers, and RTD interfaces.
• Test & Measurement Equipment: Data acquisition systems, precision voltage amplification.
• Automotive Systems: Sensor signal conditioning in harsh environments.
• Portable Devices: Low-power designs where efficiency is critical.

Conclusion of INA128UA

The INA128UA stands out as a versatile, high-performance instrumentation amplifier with low noise, wide voltage range, and precision characteristics. Its low power consumption and robust design make it ideal for medical, industrial, and automotive applications where signal integrity is paramount. Compared to similar models, its combination of bandwidth, slew rate, and ultra-low bias current ensures superior performance in noise-sensitive systems. Engineers seeking a reliable, high-accuracy solution for sensor interfacing or signal conditioning will find the INA128UA an optimal choice.