LV4991TT-TLM-E

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Class AB
Output Type:	1-Channel (Mono)
Max Output Power x Channels @ Load:	450mW x 1 @ 8 Ohm
Voltage - Supply:	2.7 V ~ 5.5 V
Features:	Standby, Thermal Protection
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	8-MSOP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Base Part Number:	LV4991

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LV4991TT-TLM-E Audio Linear Amplifier: Application Field and Working Principle

An audio Linear Amplifier, such as the LV4991TT-TLM-E, supports the electronic amplification of audio signals and is used in a wide array of applications, including broadcast, recording and music production. The LV4991TT-TLM-E is an integrated circuit (IC) by Texas Instruments (TI) that utilizes linear amplification principles in order to produce high-fidelity audio signals.

Applications

The LV4991TT-TLM-E can be used in a variety of applications, including:

• Professional audio systems
• Home audio systems
• TV and radio receivers
• Industrial audio systems
• General purpose signal processing systems

The IC is capable of amplifying different frequency ranges, with a maximum signal-to-noise ratio of up to 96dB. Furthermore, its signal range extends from 20Hz to 20kHz, producing sound with exceptional fidelity. The amplifier is also able to operate from either a single supply, or a dual-supply mode. This provides engineers with the ability to utilize the device for a variety of applications, according to their desired needs, such as for Hi-Fi loudspeakers and other PA systems, as well as for stand-alone amplifiers for mobile devices.

Working Principle

The LV4991TT-TLM-E utilizes the concept of linear amplification, which can be broken down into three stages:

• Input Stage: An AC signal is taken into the device in the form of an electrical current and routed to the input stage. Here, the signal is given a low-impedance path through the use of a voltage amplifier circuit.
• Amplification Stage: This stage amplifies the signal using operational amplifiers (op-amps). The op-amp operates in a sealed loop and is capable of receiving information from the preceding step, as well as providing output signals to the next stage.
• Output Stage: The output stage takes the amplified signal from the previous stage and converts it into a stable, low-impedance output. This makes sure that the signal is distributed to the load or the output device without suffering any losses or distortion.

Conclusion

The LV4991TT-TLM-E audio linear amplifier is an integrated circuit by Texas Instruments (TI) that provides consistent and highly-accurate audio signals over a broad frequency range. Its applications span a wide range of industries, including broadcast, recording and music production, providing audio professionals and engineers with the tools to create high-fidelity sound. Its linear amplification architecture ensures that signals are accurately reproduced with little to no distortion.

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