Evaluation Boards – Op Amps

The LMV851EVAL/NOPB is a evaluation board for operational amplifiers. An operational amplifier, or op-amp, is a high-gain direct-coupled amplifier that can be utilized for any application that amplifies small signals to levels suitable for processing. As a key component in analog and digital signal processing and control systems, the LMV851EVAL/NOPB operational amplifier is versatile and can be implemented as an inverting amplifier, a noninverting amplifier, a filter amplifier, a voltage follower, a summing amplifier, an active integrator, an active differentiator, and an oscillator.

Application Field

The LMV851EVAL/NOPB consists of two 8-pin dual operational amplifiers (OPA851) – making it ideal for audio applications such as preamplification, buffering, and driving loudspeakers. It can also be used in instrumentation circuitry, first-order active filters, voltage regulation, data acquisition, power supply control, motor control systems and other applications. Low-noise and large-voltage amplifier applications such as LED display drivers, video instrumentation amplifiers, video circuits and RF (Radio Frequency) circuits can also benefit from the op amps.

Working Principle

At its core, the LMV851EVAL/NOPB consists of four op amps which are powered by a single 5V rail, although they can withstand supplies up to 10V. Each op amp is composed of a differential amplifier stage, with two transistors for each differential pair, whose input has been low-pass filtered and Bootstrapped to provide a large common-mode voltage range. The differential amplifier has a differential gain of 106dB and supports both single-ended and differential input signals.

Each op amp also has a common-mode feedback loop which allows it to offer a cutoff frequency response that is independent of the load of the amplifier. The opamps also have level shifting of a voltage reference separator to ensure a high level of accuracy. Additionally, the LMV851EVAL/NOPB has a unique noise-canceling feature that helps reduce the influence of external noise on its performance.

The LMV851EVAL/NOPB operational amplifier features low voltage noise, low distortion, and fast settling time, while also providing a large output-voltage swing. It has a wide frequency response (from less than 1 Hz to greater than 1 MHz). All of these features make the LMV851EVAL/NOPB a versatile and powerful operational amplifier for use in a wide variety of applications.

Conclusion

The LMV851EVAL/NOPB is a state-of-the-art evaluation board for operational amplifiers that offers a wide range of applications. With its low noise, low distortion, and fast settling time, the LMV851EVAL/NOPB is a great option for audio, instrumentation, video, RF, and other signal processing applications. Its Noise-Canceling feature helps to reduce the influence of external noise – making it highly effective for applications requiring low-noise performance. As a result, the LMV851EVAL/NOPB is an ideal choice for designers looking for a versatile and powerful operational amplifier.