LM4990ITL/NOPB

Series:	Boomer®
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Class AB
Output Type:	1-Channel (Mono)
Max Output Power x Channels @ Load:	2W x 1 @ 4 Ohm
Voltage - Supply:	2.2 V ~ 5.5 V
Features:	Depop, Shutdown
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	9-DSBGA
Package / Case:	9-WFBGA, DSBGA
Base Part Number:	LM4990

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Introduction

The LM4990ITL/NOPB is a high-voltage, rail-to-rail operational amplifier that is used in a variety of audio application fields. It offers low noise, low distortion, and excellent DC and AC performance, making it an ideal choice for many audio applications. The LM4990ITL/NOPB is designed to operate on supplies ranging from 3.0V to 48V and has a minimum power gain of 60dB at higher frequencies, making it suitable for a wide range of signal sources.

Applications

The LM4990ITL/NOPB is most commonly used in audio applications, such as low noise preamplifiers, distortion free signal amplifiers, and low distortion input signals for audio filters. It is also suitable for use in instrument amplifiers, D/A and A/D converters, and high-end audio applications such as low noise vocal preamplifiers.In addition to audio applications, the LM4990ITL/NOPB is also suitable for a variety of general-purpose applications, such as precision-controlled amplifiers and wide-bandwidth active filters. It is also used in various motor control circuits, and can be used as a low noise comparator with a high common-mode rejection ratio.

Features

The LM4990ITL/NOPB offers a wide range of features that make it well-suited for a variety of audio applications. It includes a built-in attenuator that allows the output signal to be attenuated by a factor of up to 1/100th of the input signal. This feature is most useful for low level signals and eliminates the need for an external attenuator. The LM4990ITL/NOPB also features a wide band-width of 55kHz and a low open loop gain of 85dB. This allows it to offer clean signals at higher frequencies, which is beneficial for audio applications. In addition, the amplifier\'s precision gain and high slew rate allow it to drive large capacitive loads, making it suitable for a wide range of applications.The LM4990ITL/NOPB also offers excellent distortion-free performance, with less than 0.1% THD (Total Harmonic Distortion). This gives the LM4990ITL/NOPB a low distortion characteristic that is suitable for high-end audio applications.

Working Principle

The LM4990ITL/NOPB is a voltage-feedback amplifying device that operates from 3V to 48V and is designed to amplify both AC and DC signals with low stops and decoupling capacitors on both the inputs and output. The rail-to-rail input and output voltage swing also reduces the need for external biasing and helps optimize the performance of the LM4990ITL/NOPB amplifier.The LM4990ITL/NOPB uses a high gain, low noise input stage to amplify small signals, while the wide band-width output follower ensures that the output is clean and distortion-free. The LM4990ITL/NOPB also features a built-in comparator that can be used to compare inputs with reference signals and to detect transients.

Conclusion

The LM4990ITL/NOPB is a high-voltage, rail-to-rail operational amplifier that is suitable for a wide range of audio applications. With low noise, low distortion, and a wide band-width, it is ideal for a variety of audio applications, from low noise preamps to high-end vocal preamps. The LM4990ITL/NOPB is also suitable for a variety of general-purpose applications, including precision-controlled amplifiers and wide-bandwidth active filters, and can be used as an excellent comparator for fast transient detection.

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