OPA340UA/2K5G4

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An instrumentation amplifier, OPA340UA/2K5G4 is an integrated, differential circuit designed to optimize the performance of many transducer signal conditioning systems. It offers a wide range of applications and features in today’s prevalent signal conditioning circuit design. The amplifier is capable of providing high gain and low offset voltage, with low distortion and high bandwidth. The OPA340UA/2K5G4 amplifier offers excellent performance characteristics for many applications with its wide signal gain range, low offset voltage, high common-mode rejection ratio (CMRR), and low distortion.

Function and Operation

Instrumentation amplifiers have a unique function and operation, with the goal of amplifying signals that have low dynamic range, with minimal noise. This time-saving, integrated device consists of three op-amps, two of which are used for signal amplification, while the third operates as an output stage. The input stage consists of two matched gain stages which are adjusted using a single adjustable resistor. This resistor determines the gain of the circuit.

The OPA340UA/2K5G4 uses two independent input stages, with an amplifier connected to each stage. This configuration operates in a differential mode and offers higher gain and output voltage ranges than single-ended configurations. With a common-mode rejection ratio (CMRR) of up to 105dB and a differential voltage range of 4.3V, the OPA340UA/2K5G4 provides excellent dynamic range for many applications.

Features and Benefits

The OPA340UA/2K5G4 has several features and benefits that make it suitable for many applications. It features low distortion, with a typical -0.004% THD @ 1KHz and high slew-rate of up to 7V/us. Additionally, the OPA340UA/2K5G4 has a wide supply voltage range of 4V to 15V, and can be used with both ac and dc source signals.

The amplifier’s low-noise performance is ideal for low-level signal processing, as it provides low noise levels that are generally between 1-10μV/Hz1/2. Additionally, the amplifier’s low-bias current allows for direct connection of the output to CMOS logic or high impedance analog circuits. The OPA340UA/2K5G4 also offers excellent immunity to electromagnetic interference, making it well suited for use in sensitive applications.

Applications

The OPA340UA/2K5G4 provides excellent performance characteristics and is suitable for many signal conditioning applications. For example, it can be used in medical instrumentation, such as biosensors and EEG systems, as well as low-level transducer signal conditioning circuits. The amplifier is also well-suited for industrial applications, such as flow meters and process control. Additionally, the OPA340UA/2K5G4 can be used in audio and video applications, such as pre-amps and ADC drivers. It is also suitable for use in scientific and test instrumentation, as well as A/D converters.

Conclusion

The OPA340UA/2K5G4 is an integrated, differential circuit designed for use in many transducer signal conditioning systems. The amplifier offers high gain, low offset voltage, low distortion, and a wide signal gain range. It also offers a high common-mode rejection ratio (CMRR), low noise, and low bias current, allowing for direct connection of the output to CMOS logic or high impedance analog circuits. The amplifier is suitable for many applications, including medical, industrial, audio and video, scientific, and test instrumentation. Therefore, the OPA340UA/2K5G4 is an ideal choice for many signal conditioning applications.

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