The MAX9722ATE from Maxim Integrated is a high-performance, low-cost, DirectDrive® stereo headphone amplifier that delivers a superior audio experience. It is designed to drive 16Ω to 600Ω headphones from a single 2.7V to 5.5V supply, making it an ideal choice for portable music players, smartphones, tablets, and other personal audio devices.

Key Features

• DirectDrive Technology: This feature eliminates the need for bulky DC-blocking capacitors, ensuring a smaller PCB footprint and improved audio quality.
• High Output Power: The MAX9722ATE can deliver up to 130mW per channel into a 16Ω load, providing ample volume and clarity for a wide range of headphones.
• Low Distortion: With a total harmonic distortion plus noise (THD+N) of just 0.004%, it ensures crystal-clear audio reproduction.
• High Power Supply Rejection Ratio (PSRR): Its excellent PSRR of 75dB at 1kHz minimizes noise and interference from fluctuating power supplies.
• Flexible Power Supply: The device operates across a wide range of power supplies from 2.7V to 5.5V, accommodating various battery technologies and system power schemes.

Performance Advantages

The MAX9722ATE stands out for its high-fidelity audio amplification. The integration of DirectDrive technology means that the output capacitors are no longer necessary, which not only saves space but also reduces output pops and clicks upon startup. Additionally, the high PSRR ensures that the audio output remains clean and unaffected by power supply variations, a common issue in portable applications.

Applications

Due to its versatility and high-quality audio output, the MAX9722ATE is well-suited for a variety of applications, including:

• Portable and wireless headphones
• Mobile phones and tablets
• Portable DVD players
• Portable gaming devices
• Notebook and desktop computers

With its combination of performance, efficiency, and size, the MAX9722ATE is a top choice for designers looking to enhance the audio experience in their portable and consumer electronics products.