MAX9709ETN+D

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The MAX9709ETN+D is an integrated linear audio amplifier for use in high-fidelity audio applications such as sound bars, portable media players, home theater systems, and automotive audio systems. Utilizing a Bipolar-Compatible Class D output stage combined with a high-efficiency boost converter, the MAX9709ETN+D is capable of delivering up to 70W into 4 Ohms of headphone impedance and up to 30W into 8 Ohms of loudspeaker impedance without the need for an external power supply.

The MAX9709ETN+D is a very efficient solution for a variety of linear audio amplifier applications, as it operates with a switching frequency of 250kHz and can reach efficiencies of up to 95%. This device features a seven-channel integrated amplifier module, with six differential line-level inputs and one mono subwoofer input. It also features a unique 3D audio post-processing technology, enabling acoustic stimulation from a variety of audio sources.

The MAX9709ETN+D offers highly flexible design options due to its integrated boost converter. It has two boost current modes, allowing for the output voltage to be increased to up to 50V, or adjusted to a lower level for power-savings. The integrated boost converter also offers signal stability, reducing oscillations and providing a highly stable output in the presence of power supply variations.

In addition to its integrated boost converter, the MAX9709ETN+D also incorporates a fully-differential headphone amplifier and an independent adjustable-gain microphone amplifier, providing superior audio performance with low harmonic distortions. The device also features a temperature-compensated input stage, enabling accurate and reliable audio signals under varying conditions.

The MAX9709ETN+D features a simple, single-ended design, reducing component count and simplifying board layout. It can be configured for stereo or mono mode, and is capable of driving headphone impedance down to 16 ohms. The MAX9709ETN+D also features built-in protection circuitry for thermal, short circuit, and over-current conditions, as well as built-in gain and level adjustment for individual channels. This results in a highly reliable and secure audio solution.

Summing up, the MAX9709ETN+D is a highly efficient integrated linear audio amplifier for use in a variety of high-fidelity audio applications. Combining an efficient boost converter, a seven-channel integrated amplifier module, and integrated headphone and microphone amplifiers, the device offers superior linear audio performance with low harmonic distortion. It also integrates a temperature-compensated input stage, protection and gain/level adjustment circuitry, and a single-ended design to reduce component count and simplify layout.

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