EL2228CY

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Linear amplifiers are a type of amplifier used to amplify an input signal while maintaining its waveform in the output. An instrumentation amplifier, also known as an instrument-amplifier, is a family of differential-input amplifiers optimized to amplify low-level signals in the presence of higher-level common-mode signals. In comparison to standard operational amplifiers (op-amps), instrumentation amplifiers are most suitable for applications that require higher performance such as precision measurements, medical diagnostics, and bridge systems. They are often found in data acquisition and control systems, as well as in audio and communication systems due to their resistance to external electromagnetic noise.

The EL2228CY is an instrumentation amplifier, designed to amplify small signals in the presence of large common mode signals. It features an input voltage range of -0.3 V to +4.98 V, with an output swing of -3 V to +3 V; power supply voltage between 8 V and 24 V; and a settling time of 0.1 µs. The amplifier is designed to have low drift and low power consumption, making it ideal for applications that require low-voltage operation. It also features a shutdown control, which can be used to reduce power consumption when the amp is not in use. The EL2228CY also includes two built-in matched diodes that provide protection against transient voltages, making it suitable for use in industrial and scientific applications.

The EL2228CY’s working principle relies on the fundamental concept of negative feedback to achieve high gain and low output impedance. The amplifier is built upon an integrator based differential amplifier, which is an operational amplifier with two differential input terminals (positive and negative), and two output terminals (positive and negative). The differential amplifier uses two equal resistors, connected in series between the two inputs, to convert the input voltage into current. The current is then amplified by the operational amplifier, and then converted back to voltage. This provides the amplifier with a large differential gain and low output impedance.

The gain of the EL2228CY instrumentation amplifier is stabilized by a feedback network. A network of resistors is connected between the output terminals and the two inputs, in such a way that the output is effectively compared to the input signal. Any output signal that is greater than the input signal will be short-circuited, reducing the overall gain of the amplifier. This ensures that the amplifier does not go into oscillation and provides a stable output. Additionally, the EL2228CY has an integrated output settling control, which can be used to stabilize the amplifier’s output.

The EL2228CY instrumentation amplifier is designed for precision measurements in high noise environments, such as industrial and scientific applications. Its low voltage operation, low power consumption, and integrated protection against transients make it the ideal choice for a wide range of applications. Its feedback network provides stability and precision in the output signal, which makes it suitable for use in data acquisition and control systems, as well as audio and communication system applications.

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