INA128U/2K5G4

The INA128U/2K5G4 is a precision instrumentation amplifier manufactured by Texas Instruments. It is designed for high-performance applications requiring accurate signal amplification, particularly in low-level signal processing. Here’s a detailed description of its features and specifications:

General Overview:

• Type: Instrumentation Amplifier
• Package: The INA128U comes in a 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 various industrial and commercial applications.

Key Features:

• High Precision: The INA128U offers low offset voltage (typically 50 µV) and low offset voltage drift (typically 0.2 µV/°C), ensuring accurate signal amplification.
• Low Noise: It has a low input voltage noise density, which is crucial for applications dealing with small signals, such as sensor outputs.
• High Common-Mode Rejection Ratio (CMRR): The CMRR is typically 120 dB, allowing the amplifier to reject common-mode signals effectively, which is essential in noisy environments.
• Wide Gain Range: The gain can be set from 1 to 1000 using external resistors, providing flexibility for various applications.
• Single-Supply Operation: The INA128U can operate on a single supply voltage ranging from +2.2V to +36V, or dual supplies from ±1.1V to ±18V, enhancing its versatility in different circuit designs.

Electrical Characteristics:

• Input Impedance: The input impedance is very high (typically 10^12 ohms), which minimizes the loading effect on the signal source.
• Output Swing: The output can swing close to the supply rails, allowing for maximum dynamic range in applications.
• Supply Current: The typical supply current is low, around 1.2 mA, which is beneficial for battery-powered devices.

Applications:

The INA128U is widely used in various applications, including:

• Medical instrumentation (e.g., ECG, EEG)
• Data acquisition systems
• Industrial process control
• Strain gauge and pressure sensor applications
• Transducer interfacing

Conclusion:

The INA128U/2K5G4 from Texas Instruments is a highly versatile and precise instrumentation amplifier, ideal for applications requiring accurate amplification of low-level signals in noisy environments. Its combination of high precision, low noise, and flexible gain settings makes it a popular choice among engineers and designers in various fields.