BU7271SG-TR

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BU7271SG-TR

The BU7271SG-TR is an instrumentation amplifier and buffer amplifier. It is a monolithic integrated circuit that consists of multiple transistors, diodes, resistors, and other components. The amplifier, buffer and power supply stages have all been included in a single package, allowing for easier installation and a more compact design.

Application Field

The BU7271SG-TR instrumentation amplifier is used in many electronic fields such as process control and monitoring, temperature measurement, flow and pressure measurement, sound and audio signal processing, and medical instrumentation. The device also has a long historical use in industrial automation and process control, where it is commonly used to measure, monitor, control, and reduce noise and vibration in a variety of environments.

The BU7271SG-TR is designed to provide precise amplification of low-level signals and input ranges, such as that of a strain gage, current loop, or other sensor. It is designed for use in harsh environments and is especially well suited for remote sensing applications that require high accuracy and precise measurements.

Working Principle

The BU7271SG-TR instrumentation amplifier operates with two basic inputs, either in single-ended input mode or in differential input mode. In single-ended input mode, one input is a reference voltage, while the other is the signal to be amplified. The differential input consists of two input terminals, one with the ground attached and the other with the signal to be amplified.

The BU7271SG-TR amplifies the input signals through three internal amplifying stages. Those stages are configured as a combination of a differential input stage, a common-mode gain stage, and a differential output stage. The gain of the differential input stages is adjustable with a single external resistor, enabling an input gain of up to 500. The common-mode gain stage provides a constant gain for common-mode signals.

The differential output stage converts the differential input signal to an output voltage. The output voltage is determined by the input signal and the adjustable gain. The output of the BU7271SG-TR can be configured as either an inverting or non-inverting amplifier. Additionally, an oscilloscope, spectrum analyzer, or data recorder can be connected across the output of the amplifier to observe the amplified signals.

Performance

The BU7271SG-TR instrumentation amplifier has a supply voltage range of ±5V to ±36V and a maximum input current range of 1mA to 1A. It also has a gain bandwidth of 18MHz, sink/source current of 0.1mA to 1mA, and open-loop voltage gain of 0.05V/V, 10V/V, and 25V/V. The amplifier provides excellent CMRR, common-mode rejection ratio, and input offset voltage, making it an ideal choice for applications requiring precise and reliable performance.

The BU7271SG-TR is a highly stable amplifier and maintains its performance in a wide temperature range, making it ideal for high temperature applications. Additionally, the device has excellent immunity to electrical noise, making it suitable for use in high EMI environments.

Conclusion

The BU7271SG-TR is an instrumentation amplifier and buffer amplifier that is specially designed for use in harsh environments. It is ideal for applications requiring precise and reliable performance, such as process control and monitoring, temperature measurement, flow and pressure measurement, sound and audio signal processing, and medical instrumentation. The amplifier has a wide supply voltage range, a gain bandwidth of 18MHz, sink/source current of 0.1mA to 1mA, and excellent CMRR, common-mode rejection ratio, and input offset voltage. The BU7271SG-TR is highly stable and suitable for high temperature and high EMI environments.

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