MAX9754ETI+

Series:	DirectDrive®
Packaging:	Tube
Part Status:	Obsolete
Type:	Class D
Output Type:	2-Channel (Stereo) with Stereo Headphones
Max Output Power x Channels @ Load:	2.2W x 2 @ 4 Ohm; 62mW x 2 @ 16 Ohm
Voltage - Supply:	4.5 V ~ 5.5 V
Features:	Depop, Short-Circuit and Thermal Protection, Shutdown
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	28-TQFN (5x5)
Package / Case:	28-WFQFN Exposed Pad
Base Part Number:	MAX9754

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MAX9754ETI+ Application Field and Working PrincipleThe MAX9754ETI+ is a high-performance, low-noise differential preamp linear amplifier that has the unique capability to drive headphones directly from an analog line-level audio source. It is targeted at audio applications such as home theater, audio/video products, set-top boxes, docking stations, smartphones, tablets, portable media players, and computer systems. This article will discuss the application fields and working principle of the MAX9754ETI+.The MAX9754ETI+ is a differential audio preamp that is designed for driving both headphone and line outputs from a single-ended analog audio source. It is a low-power, low-noise, low-distortion audio preamp that is capable of driving up to 100 mW into 32Ω headphones without significant THD+N. It is robust enough to drive common types of headphones, earphones, and headsets, and it is well-suited for driving high-capacity capacitive loads. The preamp is fully differential, with no single-ended inputs or outputs, and is immune to common-mode peeks and dips.The MAX9754ETI+ provides single-ended-to-differential conversion as well as gain selection, allowing it to be used in a wide range of applications. With its easy-to-use serial port interface and built-in failed gain detection, the MAX9754ETI+ enables a simple, reliable and low cost implementation for controlling both gain and volume levels. It supports analog gain settings from 1x to 20x and provides low distortion and noise figures. In addition, its wide range of capabilities allows it to be used in a variety of applications, including home theater systems, industrial, medical, and automotive audio systems.The MAX9754ETI+ is a high-speed, high-performance, low-noise amplifier with differential inputs/outputs for driving a headphone/headset, a power amplifier, or line level output stages. It features a 0.90Hz to 16.50kHz bandwidth and is capable of providing up to 100 mW of power into 32Ω headphones, while preserving its excellent signal-to-noise ratio. The amplifier offers configurable gain, distortion, and power supply rejection ratio, as well as excellent stability and broadband noise performance. In addition, it offers a wide range of input and output levels, from 1 to 100 Mv, and can handle a wide variety of headphones and line-level audio standards.The MAX9754ETI+ implements low power consuming design principles and uses low operating currents. It features high current (up to 400 mA) drive capability and a differential architecture that reduces power consumption and interference. The amplifier runs off a single supply voltage (2.7V to 5.5V) and has an operating current of less than 50 μA. With an integrated motor/relay driver, the amplifier can detect failed gain conditions and shut down the output when the required input is not available.The MAX9754ETI+ features an integrated line-chopping protection circuit that reduces distortion and crosstalk. The preamp is designed to tolerate power supply dips and transient events and to provide reduced audio distortion on a wide range of loads. The amplifier integrates digital control circuitry for independent gain and volume control, as well as digital signal processing for improved performance. The circuit’s signal-to-noise ratio is greater than 115 dB and its estimated THD+N is less than 0.003% at 100 mW. With its high performance and low power consumption, the MAX9754ETI+ is an ideal choice for driving a wide range of audio devices. In conclusion, the MAX9754ETI+ is a high-performance, low-noise differential preamp linear amplifier that is ideal for driving headphone and line outputs from a single-ended analog audio source. With its easy-to-use serial port interface and built-in failed gain detection, the MAX9754ETI+ enables a simple and reliable implementation for controlling both gain and volume levels. The amplifier offers low distortion and noise figures and features high current (up to 400 mA) drive capability with a low operating current. It provides a wide range of capabilities and is highly suitable for applications such as home theater, audio/video products, set-top boxes, docking stations, smartphones, tablets, portable media players, and computer systems. Thus, the MAX9754ETI+ is an excellent choice for driving a wide range of audio devices.

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