MAX9726BETP+

Audio Amplifiers Overview

The MAX9726BETP+ is a stereo DirectDrive headphone amplifier from Analog Devices Inc./Maxim Integrated, housed in a 20-pin TQFN package with an exposed pad. It operates on a single 2.7V to 5.5V supply and delivers 105mW into a 32Ω load at 5V. Key electrical parameters include a quiescent current of 5.5mA, shutdown current of 8µA, and 85dB PSRR at 1kHz. The device features low 0.02% THD+N, ±7.5kV HBM ESD protection, and an operating temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates bulky DC-blocking capacitors by generating a ground-referenced output from a single supply using an internal charge pump.
• Integrated software-controlled BassMax feature boosts bass response to compensate for low-frequency attenuation in standard headphones.
• Built-in 64-level digital volume control allows precise gain adjustment without external potentiometers.
• Advanced click-and-pop suppression circuitry minimizes audible transients during power-up and power-down sequences.

Audio Amplifiers Applications

• Portable audio devices requiring space-saving designs
• Battery-powered consumer electronics
• Headphone amplifiers for mobile phones and media players

Audio Amplifiers Procurement Notes

Verify the specific ordering suffix ET indicates the 20-pin TQFN package configuration. Confirm lead-free status via the '+' designation. Check component availability as this part may be subject to lifecycle changes or discontinuation. Ensure I2C/SMBus interface compatibility with the host microcontroller before procurement.

Audio Amplifiers Selection Notes

Select this component when minimizing board space is critical due to the elimination of large output coupling capacitors. Choose the MAX9726BETP+ for applications requiring integrated digital volume control and programmable bass boost. Verify that the required output power aligns with the 105mW capability at the target supply voltage and load impedance.

Audio Amplifiers Part Context

This device belongs to the MAX9726 family of DirectDrive headphone amplifiers. It shares core functionality with variants like the MAX9726AETP+, differing primarily in I2C slave address settings. The family is designed for high-performance audio in compact portable systems.

Audio Amplifiers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative models within the same product family based on pinout and functional compatibility.

Audio Amplifiers FAQ

How does the DirectDrive architecture benefit the design?

It creates a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, which saves board space and reduces cost.

What is the purpose of the BassMax feature?

BassMax improves audio reproduction by boosting the bass response, compensating for the low-frequency attenuation inherent in many inexpensive headphones.