OP42GSZ-R7

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The OP42GSZ-R7 is an operational amplifier (opamp) from Texas Instruments that was released in 2020 and is part of their high-performance general purpose opamp family. It is designed for single-supply operation using a wide supply voltage range, with rail-to-rail operation on the input and output stages. It is well suited for a variety of voltage amplifier applications, including instrumentation, buffer, and linear amplifiers. In this article, we will explore the OP42GSZ-R7 amplifier’s application fields and working principles.

The OP42GSZ-R7 has a slew rate of 3V/µs and an optimal response time of less than 3µs, making it well-suited to fast transients and voltage switching applications. It features low power consumption of just 15mW and has a low input bias current of 8pA. This makes it well suited for use in battery-powered applications, as well as applications that require low noise and high accuracy. The OP42GSZ-R7 can also deliver low distortion performance with a THD+N of 0.005%.

The OP42GSZ-R7 can be used in a wide range of applications, including instrumentation, buffer, and linear amplifiers. In an instrumentation setting, it can be used to amplify and condition signals from measurement sensors such as strain gauges, thermocouples, and other transducers. It is also well suited for use in differential amplifier circuits, where its low bias current, low noise, and wide supply voltage range increase performance.

In a buffer amplifier application, the OP42GSZ-R7 can be used to isolate the input from the output, preventing any loading of the source. This ensures a pure signal is delivered to the output. The buffer amplifier can also be used to drive high output loads or help improve the stability of a system by providing greater input impedance.

In a linear amplifier application, the OP42GSZ-R7 can be used to amplify a signal with a low distortion. With its wide voltage range and rail-to-rail operation, the amplifier has the capability to deliver high voltage swings in an effortless manner. It can also provide high accuracy due to its low noise and low distortion performance, making it well-suited for a range of audio applications.

The working principle of the OP42GSZ-R7 amplifier is based on the common source configuration, also known as the single-ended amplifier or the inverting amplifier. The OP42GSZ-R7 uses an N-channel MOSFET as the input transistor and two N-channel MOSFETs as the output transistors. The input transistor is referenced to a ground, and the gate voltage of the two output transistors are connected for an inverting amplifier configuration. The output is then taken from the drain of the second N-channel MOSFET.

When a signal is applied to the input of the OP42GSZ-R7 amplifier, the input transistor conducts, and its gate voltage is applied to the gates of the output transistors. This causes current to flow through the output transistors, resulting in an amplified output that is 180 degrees out-of-phase with the input signal. The amount of amplification is determined by the ratio of the voltage gain, which is determined by the characteristics of the transistors used in the amplifier.

The OP42GSZ-R7 amplifier is a highly versatile and general purpose opamp that is suitable for a wide range of demanding applications. With its wide voltage range, rail-to-rail operation, low distortion and noise performance, and low power consumption, the OP42GSZ-R7 is an ideal choice for a variety of instrumentation, buffer, and linear amplifier applications. With its excellent performance, it is sure to meet the requirements of a wide range of applications.

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