INA128UA/2K5G4

The INA128UA/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 INA128UA comes 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 a wide temperature range, typically from -40°C to +85°C, making it suitable for industrial and automotive applications.

Key Features:

• High Precision: The INA128UA offers low offset voltage (typically 50 µV) and low offset drift (typically 0.2 µV/°C), ensuring accurate amplification of small signals.
• Gain Configuration: The gain of the amplifier can be set using a single external resistor, allowing for flexibility in applications. The gain can be adjusted from 1 to 1000, making it versatile for various signal levels.
• Low Noise: The device features low noise characteristics, with a noise density of approximately 8 nV/√Hz at 1 kHz, which is crucial for applications involving weak signals.
• High Common-Mode Rejection Ratio (CMRR): The INA128UA has a high CMRR (typically 130 dB), which helps in rejecting noise and interference from common-mode signals, enhancing the integrity of the amplified output.
• Wide Supply Voltage Range: It operates on a dual supply voltage ranging from ±2.5 V to ±18 V, or a single supply from 5 V to 36 V, providing flexibility in power supply design.

Applications:

The INA128UA is ideal for a variety of applications, including:

• Medical instrumentation (e.g., ECG, EEG)
• Data acquisition systems
• Industrial process control
• Strain gauge and pressure sensor applications
• Thermocouple and RTD signal conditioning

Electrical Characteristics:

• Input Impedance: The input impedance is very high, typically around 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 single-supply applications.
• Power Consumption: The device is designed for low power consumption, making it suitable for battery-operated devices.

Conclusion:

The INA128UA/2K5G4 from Texas Instruments is a robust and versatile instrumentation amplifier that excels in precision applications. Its combination of high accuracy, low noise, and flexible gain settings makes it an excellent choice for engineers looking to amplify small signals in a variety of demanding environments.