LM4992SDX/NOPB

The LM4992SDX/NOPB is an audio amplifier from Texas Instruments that was designed for use in closed-loop systems. The amplifier has an input of 0.1V and an output power of 5W into a 4ohm load. It is optimized for DC offset and a low distortion rate, plus it is fast settling, with a 4kHz gain-bandwidth product. The amplifier also features high input impedance and low output impedance, making it suitable for differential inputs and static power supplies. As such, the LM4992SDX/NOPB is well-suited to be used as a buffering device, tying together various parts of a closed loop system such as preamps, volume controls, or pre-amplifiers.

The LM4992SDX/NOPB is a unity-gain stable, transconductance op-amp that uses bipolar transistors and a complementary output stage. Its architecture is similar to that of the LM358A op-amp, but it improves on the latter’s performance by offering a larger unity-gain bandwidth and faster settling time. This allows it to provide low-distortion signals with a bandwidth of up to 3kHz with negligible group delay.

The LM4992SDX/NOPB also features low input bias current due to its low open-loop output impedance. As a result, it is the ideal choice for applications in which the amplifier requires to have a low noise floor and minimal distortion. This makes it suitable for applications in which the amplifier has to amplify signals from a variety of sources and must be able to ensure minimal distortion from the input stage to the output stage.

The LM4992SDX/NOPB is designed to be driven by +9V and has an operational SNR of 90dB. It has an output power of up to 5W into a 4ohm load, making it suitable for powering portable speakers or high-end studio monitors. It also has an input impedance of 10Kohm, making it especially suited for high-impedance sources such as guitars, synthesizers or signal processors that require a high-input impedance to ensure minimal signal-to-noise ratio.

The LM4992SDX/NOPB is suitable for a variety of audio applications, including power amplifiers, computer speakers and active crossovers. It is ideal for applications where dynamic characteristics, total harmonic distortion and intermodulation distortion (THD & IMD) have to be minimized. Its fast settling time makes it the ideal choice for applications requiring quick on/off functions such as pulse-width modulation (PWM) or audio mute functions.

In summary, the LM4992SDX/NOPB offers power, low distortion, high-impedance input and fast settling time, making it an ideal choice for closed loop systems. Its wide bandwidth and low noise floor make it suitable for audio applications, from power amplifiers to active crossovers. Its fast settling time and low distortion characteristics make it the ideal choice for applications requiring dynamic characteristics, THD & IMD minimization, or quick on/off functions.