OPA2625IDGST

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OPA2625IDGST Application Field and Working Principle

The OPA2625IDGST is an instrumentation amplifier, primarily intended for low-level signal amplification and conditioning in the signal processing and signal conditioning fields. This integrated linear amplifier is capable of providing differential gain and phase as accurately as ±0.1%, a wide gain range of 1020, adjustable high- or low-pass filters, and distortion ratings as low as 0.0003%. In addition, the device also includes current limitation and temperature protection functions, providing an extremely reliable and robust product for various applications.

Applications

The OPA2625IDGST is designed for applications such as signal processing, signal conditioning, and test & measurement. The device can be used for a wide range of applications, including medical and instrumentation equipment, automated test equipment, laboratory equipment, force sensors, gyro and accelerometers, audio equipment, video equipment, and more.

The OPA2625IDGST can be used for differential amplifiers, voltage followers, instrumentation amplifiers, dc-coupled amplifiers, differential-to-single-ended converters, single-to-differential converters, and ac-coupled amplifiers. It is also suitable for low-frequency signal amplifying and conditioning, as well as applications which require high accuracy and stability.

Features

The OPA2625IDGST features a low operating voltage of ±4.2 V, with a wide gain range of 1020. It has an input impedance of 10 MΩ, which is rather high compared to other instrumentation amplifiers. It also includes an adjustable high- or low-pass filter, and a distortion rating as low as 0.0003%.

The OPA2625IDGST also includes a current limitation and a temperature protection function. The current limitation helps to protect the device from any possible overcurrent, while the temperature protection helps to protect the device from any possible temperature-induced failures. This integrated device also has a low quiescent current rating of 86 μA, making it ideal for battery-powered systems.

Working Principle

The OPA2625IDGST operates on a two-stage differential amplifier topology. In the first stage, the circuit amplifies a small differential input voltage to a large differential voltage, while the second stage facilitates adjusting the gain to predetermined levels. The amplifier has two input pins, a non-inverting "IN+" input pin and an inverting "IN–" input pin. These two pins contain the differential inputs, which are then processed and amplified by the two stages.

The output of both stages is then fed to an output pin, with the gain being adjusted via an external resistor connected between pins "Vio–" and "VI+,” which define the gain of the amplifier. With the help of the adjustable high- and low-pass filter circuits, the OPA2625IDGST can filter out unwanted signals, while amplifying the desired signal.

The OPA2625IDGST also includes a number of other useful features, such as temperature protection and current limitation. The temperature protection feature monitors the device\'s temperature and shuts down the device in the event of an over-temperature situation. The current limitation feature helps to protect the device from any external overcurrent, which can cause device damage.

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