TPA731DGNG4

Series:	--
Packaging:	Tube
Part Status:	Active
Type:	Class AB
Output Type:	1-Channel (Mono)
Max Output Power x Channels @ Load:	700mW x 1 @ 8 Ohm
Voltage - Supply:	2.5 V ~ 5.5 V
Features:	Differential Inputs, Short-Circuit and Thermal Protection, Shutdown
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	8-MSOP-PowerPad
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
Base Part Number:	TPA731

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Introduction
The TPA731DGNG4 is an integrated circuit from Texas Instrument (TI), specifically designed for linear audio applications. It is a low-power solution in the Audio Series of TI’s high-performance analog portfolio. Its features include high linearity and low distortion while operating in two gain stages. Its high-performance characteristics make it an ideal choice for professional applications such as amplifying audio signals in audio systems and studio recording applications.Feature
The TPA731DGNG4 is an Audio Series IC offering high performance, low distortion, and low power consumption. The integrated circuit features two gain stages, allowing it to be used in a variety of audio applications. It has a maximum output voltage of 8.1V (± 4.2V) and a bandwidth of 10Hz to 380kHz. It is available in a thermally-enhanced 8-pin TSSOP (Thin Shrink Small Outline Package) package with a small footprint for easy access to terminals.The TPA731DGNG4 is highly linear and offers low THD+N handling of 0.002%. It is also highly efficient and allows the designer to achieve a great power-management solution with its low quiescent current consumption of only 1.25 mA. Additionally, TI\'s Audio Series has their own radio-frequency interference (RFI) filter to protect audio signal from external noise.Application Fields
The TPA731DGNG4 is most suitable for use as an amplifier for audio frequencies in professional applications, such as studio recording and live sound reinforcement. It is also highly suitable for consumer audio systems, such as car audio amplifiers and home theater systems. Furthermore, it can be used for audio signal conditioning in medical, automotive, and industrial applications.Working Principle
The TPA731DGNG4 is based on a two-stage amplifier topology. The first stage is a GAINTRAC input stage which offers a high linearity, low distortion, and low noise performance over the entire audio frequency range. The second stage is used to further reduce the distortion and provides an output voltage gain of up to 6 dB.The TPA731DGNG4 is designed with a closed-loop electric feedback circuit around each stage. This feedback scheme helps to reduce distortion and noise while providing high-performance linearity, enabling it to be used in a variety of audio applications. In addition, the integrated circuit features a slew-rate control which can help to reduce audio distortion within the frequency range of 10Hz to 1kHz.Conclusion
The TPA731DGNG4 is an Audio Series Integrated Circuit from Texas Instruments, designed for linear audio applications such as amplifiers, signal conditioning, and professional audio recordings. It is highly linear with low distortion and low power consumption, making it an ideal choice for portable and consumer applications. Its two gain stages, low THD+N, and RFI filter make it suitable for a variety of different audio systems and applications.

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