AD842KQ

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AD842KQ is an integrated circuit (IC) intended for use in linear applications. It belongs to the family of ‘instrumentation, OP amps, buffer amps’ and provides a variety of features in one very small package.The AD842KQ is a dual high voltage, bi-directional buffer amplifier. It has a wide input range, low noise and distortion levels, and excellent linearity. Its low input offset voltage and high-input impedance make it suitable for many applications. The output is also designed to drive high capacitance loads.The versatile design of the AD842KQ gives it the ability to be used in a variety of applications. These include general-purpose instrumentation, data acquisition, control and test systems, audio, video and imaging systems, communication systems and automotive electronics. One of the main applications of the AD842KQ is in differential measurement circuits. Here, it is used in combination with a bridge converter to measure differential voltage signals. It can also be used to drive very low input impedance loads over long distances.The working principle of the AD842KQ is as follows. It is a bi-directional amplifier which has two differential input and two single-ended output stages. The two differential inputs are connected to an internal differential gain amplifier and to an output buffer amplifier. The gain amplifier provides the overall loop gain of the buffer amplifier, which is adjustable by changing the gain of the amplifier. The output buffer amplifier provides the output drive current and impedance matching. The AD842KQ contains advanced protective functions, including current limiting and input over-voltage protection. Its high-speed performance and low power consumption make it suitable for use in high-speed, power-sensitive applications.In summary, the AD842KQ is a versatile integrated circuit intended for use in linear applications. It belongs to the family of ‘instrumentation, OP amps, buffer amps’ and provides excellent linearity, low noise and distortion levels, and outstanding current and voltage drive capabilities. It is suitable for a variety of applications, such as differential measurement, general-purpose instrumentation, data acquisition, control and test systems, audio, video and imaging systems, communication systems and automotive electronics.

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