Maxim Integrated MAX9722AEUE+ Audio Amplifier

The MAX9722AEUE+ from Maxim Integrated is a high-performance, low-distortion, DirectDrive® stereo headphone amplifier that delivers exceptional audio quality for a wide range of consumer electronics. Designed with the audiophile in mind, this compact and efficient integrated circuit (IC) provides a superior listening experience for users of portable media players, smartphones, laptops, and other devices that require high-quality audio amplification.

This impressive amplifier operates over a wide 2.7V to 5.5V supply voltage range, making it versatile for various battery-powered applications. Its DirectDrive technology eliminates the need for bulky DC-blocking capacitors, thus reducing the external component count and saving valuable board space. The MAX9722AEUE+ also features a high 130dB power-supply rejection ratio (PSRR), which minimizes noise and interference from fluctuating power supplies, ensuring a clean and stable audio output.

The device is capable of delivering up to 130mW of continuous power per channel into a 32Ω load, with an incredibly low total harmonic distortion plus noise (THD+N) of 0.004% at 1kHz. This power efficiency does not come at the expense of sound quality, as the MAX9722AEUE+ provides a flat frequency response across the audio spectrum, preserving the integrity of the original audio signal.

For added flexibility, the MAX9722AEUE+ includes a built-in volume control, which can be easily adjusted to suit the listener's preference. Additionally, it features a low-power shutdown mode, which significantly reduces power consumption when the amplifier is not in use, thereby extending battery life.

The device is housed in a 16-pin TSSOP (Thin Shrink Small Outline Package) that offers a compact form factor suitable for space-constrained applications. Its robust design ensures reliable operation over the extended industrial temperature range of -40°C to +85°C, making it an ideal choice for demanding environments.

With its combination of high-fidelity audio performance, low power consumption, and compact design, the MAX9722AEUE+ from Maxim Integrated stands out as an excellent audio solution for designers looking to enhance the sound quality of their products without compromising on space or power efficiency.