INA121UA/2K5G4

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The INA121UA/2K5G4 is an instrumentation amplifier that is commonly used for a wide range of applications in linear amplifiers, including signal monitoring, audio measurement, and medical instrumentation. Its power supply range of 4.5V to 18V makes it suitable for most operating environments.

The amplifier is designed with an asymetric gain so that it can be used for applications with large input voltages, such as in medical imaging. It has a common-mode rejection ratio (CMRR) of greater than 120dB and a voltage offset of less than 10μV that makes it suitable for precise, low-noise amplifications. The amplifier is unity-gain stable and has excellent temperature characteristics. It is also protected against overcurrent, short-circuit, and input overload.

The INA121UA/2K5G4 operates by inverting or non-inverting the input voltage or by summing or subtracting two or more voltages. It has two input pins, one for the differential input and one for the inverting input. The output is derived from the difference between the two inputs and is amplified by a gain factor determined by the resistor network connected to the amplifier. If the inverting input is grounded, the amplifier operates as a non-inverting amplifier. If the non-inverting input is grounded, the amplifier operates as an inverting amplifier. If the differential input is grounded, the amplifier acts as an attenuator.

The amplifier has excellent thermal stability and power consumption of just 5mW. It also has low output impedance for maximum stability and a high-voltage current feedback mechanism for improved linearity. Additionally, it is designed for high-performance systems, with an input impedance of greater than 200kΩ and an output impedance of less than 2.2Ω.

The INA121UA/2K5G4 is well-suited for applications in audio measurement, medical instrumentation, and signal monitoring. Its ability to handle high input voltages and its low voltage offset make it an ideal solution for accurately measuring small signals in a variety of conditions. In addition, its high CMRR and low output impedance make it ideal for applications requiring low-noise, low-distortion amplifications. The amplifier is also stable in a wide range of environments, making it an excellent choice for a wide range of linear amplifiers.

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