LM4990ITLX/NOPB

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Audio amplifiers are becoming increasingly prevalent in many products, from Hi-Fi systems to computer sound cards and mobile phones. The LM4990ITLX/NOPB is a dual-channel, low power audio amplifier that stands out from the crowd for its low noise levels and small form factor.

The LM4990ITLX/NOPB is a monolithic, low-power audio amplifier with integrated power MOSFETs. It has an integrated differential amplifier and a simplified power output stage, enabling it to fit into a wide range of designs. The device is capable of delivering up to +10dB of gain, which is quite remarkable for this type of product. Additionally, the amplifier provides excellent idle noise performance, with a noise floor of -90dBu, so excellent sound quality is assured.

The LM4990ITLX/NOPB is a low power amplifier and so it is often used in battery-powered audio applications. The device has integrated power MOSFETs which reduce quiescent current draw, enabling it to run at higher efficiency than alternative solutions. This in turn leads to improved battery life in the application, allowing for longer music playback or telephone calls.

The amplifier has a single input and two output channels for stereo outputs, with the outputs being differential. This provides the benefit of reduced common mode noise which can cause interference in an audio system. The output stage supports Class-G operation which can further reduce power consumption. This is a technology that dynamically adjusts the power supply voltage based on the amplitude of the audio signal.

The amplifier is designed to drive both speakers and headphones, and has a power supply voltage of 3.0V to 5.5V, making the LM4990ITLX/NOPB ideal for battery-powered applications. Additionally, the device contains a pair of low-noise, 16-bit digital-to-analog converters, allowing for digital input signals to be converted to analog outputs.

The LM4990ITLX/NOPB is a versatile audio amplifier with a wide range of uses. Its low power consumption, small size and excellent sound quality make it suitable for portable audio devices such as mp3 players, mobile phones and portable media players. Additionally, it is also suitable for home Hi-Fi systems and any other audio applications that require high-fidelity audio in a compact form factor.

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