LMP2234BMA/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LMP2234BMA/NOPB is a high performance, low power FET Op Amp by Texas Instruments. This device is designed for general purpose applications, such as audio, instrumentation, and control circuits. The identical dual-channel device makes it suitable for a variety of applications requiring simultaneous signal processing of two signal paths. This application note examines the field of application, as well as the device’s working principle.

Field of Application

The LMP2234BMA/NOPB is primarily used as a linear amplifier, specifically in the instrumentation, operational amplifiers, buffers and amplifiers. This device is well suited to audio applications, such as preamplifiers, drivers and signal conditioners. It is also ideal for controlling and amplifying signals in instrumentation systems and in buffer and amplifier class products, such as audio and video receivers and sound systems.

The impressive power efficiency of the device allows it to deliver an output current of 250 mA in a single stage, making it an attractive option for low power applications. It also features high gain (GBP) and low distortion. These characteristics make it suitable for many instrumentation applications, such as voltage controlled oscillators, signal generators and motor control circuits. Additionally, its low voltage noise makes it usable in the signal-conditioning components of analog-to-digital converters (ADC).

Working Principle

The LMP2234BMA/NOPB is a differential input stage FET Op Amp. This means that the device has two inputs, labeled (−) and (+). The (−) input communicates with the gate terminal of the FET and the (+) input communicates with the source terminal of the FET. This is the differential amplifier configuration. As a result, when there is a difference between the two inputs, the total current flowing between the gate and source terminals is increased, resulting in a boosted output voltage.

The gain of this device is determined by the size of the FET. The FET’s size is proportional to the amount of current flowing through it, and this current is determined by the size of its gate capacitance. Therefore, the smaller the gate capacitance, the higher the gain. The LMP2234BMA/NOPB is designed with a low capacitance gate, so it has a high gain.

The device also features an output stage. This stage buffers the signal from the FET, allowing for a higher output current than could be delivered without an output stage. It is usually composed of bipolar junction transistors (BJTs). The BJTs act as current amplifiers, which reduces the signal distortion caused by the FET’s Miller effect. The Miller effect is a phenomenon where the signal gain of an amplifier is increased as the frequency increases. By buffering the signal, this undesired gain can be minimized.

The LMP2234BMA/NOPB is an impressive, low power amplifier, suitable for a wide range of audio, instrumentation and control applications. Its low voltage noise makes it ideal for signal conditioning components, whilst the high gain and low distortion make it well suited to most audio applications. The device’s FET differential amplifier configuration and output buffering stage are also important features, enabling enhanced performance and high output currents.

The specific data is subject to PDF, and the above content is for reference