INA138NA/250G4

The INA138NA/250G4 is a precision instrumentation amplifier manufactured by Texas Instruments. It is designed for high-performance applications requiring accurate signal amplification, particularly in environments where low noise and high common-mode rejection are critical.

Key Features:

1. Architecture: The INA138 is a three-op-amp instrumentation amplifier, which provides excellent input impedance and high common-mode rejection ratio (CMRR). This architecture allows for precise amplification of small differential signals while rejecting large common-mode voltages.

2. Gain Configuration: The gain of the INA138 can be set using external resistors, allowing for flexibility in various applications. The gain can be configured to values ranging from 1 to 1000, making it suitable for a wide range of signal levels.

3. Input Voltage Range: The device supports a wide input voltage range, which is essential for applications that involve varying signal levels. It can handle input voltages that are within the supply voltage limits, making it versatile for different circuit designs.

4. Low Noise: The INA138 features low noise characteristics, which is crucial for applications in medical instrumentation, sensor signal processing, and data acquisition systems. Its low noise performance ensures that the integrity of the amplified signal is maintained.

5. Supply Voltage: The INA138 operates on a dual supply voltage, typically ranging from ±2.5V to ±18V, allowing it to be used in both single-supply and dual-supply configurations. This flexibility makes it suitable for battery-powered devices as well as standard power supply applications.

6. Temperature Range: The device is designed to operate over an extended temperature range, typically from -40°C to +85°C, ensuring reliable performance in various environmental conditions.

7. Package Type: The INA138NA/250G4 is available in a standard 8-pin DIP (Dual In-line Package) configuration, which facilitates easy integration into existing designs and prototyping.

8. Applications: Common applications for the INA138 include medical instrumentation (such as ECG and EEG), industrial process control, data acquisition systems, and any application requiring precise measurement of small signals in the presence of noise.

Performance Specifications:

• Input Offset Voltage: Typically low, ensuring minimal error in signal amplification.
• Common-Mode Rejection Ratio (CMRR): High CMRR, typically around 100 dB, which is essential for rejecting noise and interference.
• Power Supply Rejection Ratio (PSRR): High PSRR, ensuring that variations in supply voltage do not affect the output signal.

Conclusion:

The INA138NA/250G4 from Texas Instruments is a robust and versatile instrumentation amplifier that excels in precision applications. Its combination of low noise, high CMRR, and flexible gain settings makes it an ideal choice for engineers looking to amplify small differential signals accurately in a variety of demanding environments.