INA141U/2K5 Integrated Circuits (ICs)

INA141U/2K5 application field and working principle

The INA141U/2K5 is a low-noise amplifier from Texas Instruments that is suitable for a variety of linear applications. The amplifier operates over a wide range of power supply voltages and is provided in thermally-enhanced small-outline and wide-body devices.

Applications

The INA141U/2K5 is a versatile amplifier suitable for a variety of linear applications. It can be used as a low-noise gain stage, current sense amplifier, transimpedance amplifier, and signal conditioning amplifier. In addition, the amplifier is also suitable for high-accuracy sensor signal conditioning, electrochemical sensor signal processing, and various test and measurement applications.

Features

• Wide range of power supply voltage: 4.75V to 26V
• Low input offset voltage: 0.2 mV maximum
• Low input bias current: 2 nA maximum
• Low noise: 4.3 nV/√Hz
• High common-mode rejection ratio: 94 dB
• High gain accuracy: 0.02 %/V

Working principle

The INA141U/2K5 is a current-feedback amplifier. The amplifier has an input stage consisting of a differential pair of N-channel MOSFET transistors with complementary cascode loads. This differential pair provides high common-mode rejection with minimal phase shift. The output can be configured to achieve rail-to-rail outputs or outputs that are maximized for either power or current. The amplifier has a high slew rate and excellent accuracy, making it suitable for many linear application.

The operating frequency range of the amplifier is from DC to 500kHz and the supply voltage range is from 4.75V to 26V. The amplifier is provided in small-outline and wide-body packages, both with a thermally enhanced design for better thermal performance.

Conclusion

The INA141U/2K5 is a low-noise amplifier with a wide range of power supply and operating frequency. The amplifier offers high accuracy and is suitable for a variety of linear applications.