OPA2187IDR

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OPA2187IDR Application Field and Working Principle

The OPA2187IDR is a low-noise, wide-bandwidth, high-precision operational amplifier belonging to the family of Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps. It is specially designed for low-noise application, such as signal conditioning, audio pre-amplifiers, and video signal processing.

Features and Advantages

The OPA2187IDR is equipped with a variety of features that make it an ideal choice for precision voltages and signal conditioning. These features include:

• Low Noise: The OPA2187IDR has a minimum noise figure of 4nV/√Hz at 10kHz, making it suitable for high-dynamic-range PLL, ADC, and other signal conditioners.
• High Bandwidth: The OPA2187IDR offers a full-power frequency response of 10 MHz, allowing it to pass reproducible signals over a wide range of frequencies.
• High-Precision CMRR: The OPA2187IDR has an excellent audio common-mode rejection ratio of 116 dB, which ensures signal fidelity when used in audio applications.
• Low Distortion: The OPA2187IDR has a low distortion rating of 0.000020% THD+N at 1kHz, making it an ideal choice for high-fidelity audio amplifiers.

Application Areas

Due to its impressive combination of features, the OPA2187IDR has a variety of applications. These include:

• Audio Pre-Amplifiers: The OPA2187IDR can be used as an audio pre-amplifier due to its low-noise handling, high precision, and low distortion.
• PLLs: The OPA2187IDR can be an ideal choice for phase-locked loops due to its high common-mode rejection ratio and wide bandwidth.
• Analog-to-Digital Converters: With its low distortion and low-noise performance, the OPA2187IDR can be used as the gain stage for analog-to-digital converters.
• Signal Conditioning: The OPA2187IDR can be used as a signal conditioner in high-performance signal-processing applications, due to its wide frequency response, high CMRR and low distortion.

Working Principle

The OPA2187IDR is an integrated circuit, which consists of several transistors as well as passive components such as resistors and capacitors. When a signal is applied to the input, the transistors form an AC voltage divider in order to reduce the signal level to a suitable level. The signal is then amplified by the transistors and is output from the amplifier.

The OPA2187IDR also utilizes negative feedback to reduce distortion and further improve its linearity. The feedback network consists of a resistor connected to the output of the device and another resistor connected to the inverting input of the device, forming a loop to the input. The output voltage of the amplifier is compared to the input voltage and the difference is used to correct the gain of the device, in order to improve the linearity.

Conclusion

The OPA2187IDR is a low-noise, wide-bandwidth, high-precision operational amplifier that belongs to the family of Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps. It has a variety of features that make it well-suited for precision voltages and signal conditioning. These features include a low noise figure, high bandwidth, high-precision common-mode rejection ratio, and low distortion. Its application areas include audio pre-amplifiers, PLLs, analog-to-digital converters, and signal conditioners. The OPA2187IDR utilizes negative feedback to reduce distortion and further improve its linearity.

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