OP279GS

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The OP279GS is an instrumentation amplifier (IA) designed for high-precision applications, such as audio, data acquisition, and test and measurement. This amplifier provides a wide range of features and performance levels, from low-power to high-speed, while having minimal external components. The OP279GS consists of a three-stage amplifier circuit, with the middle stage being a differential amplifier, and the other two stages being a common-mode buffer and a current-feedback anti-aliasing filter. The amplifier is also capable of providing good input linearity of up to 1%.

The OP279GS has a wide power range of 8.2 to 40V, with a single-supply operating range of 4 to 18V. It has a temperature range of -40 to 85°C and a typical gain-bandwidth product of 5MHz. The amplifier also has an ac slew rate of 6V/µs, with a settling time of less than 1µs. The amplifier also features an output stage consisting of a complementary push-pull output stage.

The OP279GS is also capable of providing a wide range of operating conditions. It has a high common-mode rejection ratio (CMRR) of up to 106dB and a high input impedance of up to 1.2MΩ. The amplifier also features programmable gain with a range of 1 to 20 and a wide common-mode voltage range of 0 to rail. The amplifier also provides low input noise, with a typical value of 1.2nV/√Hz.

The working principle of the OP279GS is based on the use of a differential amplifier. A differential amplifier is a three-stage circuit consisting of a differential input stage, a feedback stage, and an output stage. In the differential input stage, two input signals are applied across the two input terminals of the amplifier, and the differential gain is determined by the relative values of the input resistors. The differential signal that is created by the differential input stage is then amplified by the feedback stage, which is also based on the use of two feedback resistors, and the gain is determined by the ratio of the resistors. Finally, the signal is amplified further in the output stage, which is designed to provide a current signal to the output.

The OP279GS is a widely used amplifier for a variety of applications, such as audio, data acquisition, and test and measurement. It provides excellent linearity, a wide range of performance levels, and low power consumption. The amplifier is also capable of providing high input impedance, low input noise, and a wide common-mode voltage range. The amplifier is also capable of providing programmable gain, with a range of 1 to 20. Finally, the amplifier is also capable of providing good CMRR and settling time values.

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